{"title":"Alternators","description":"\u003ch2\u003eMarine alternators: generating power with the engine\u003c\/h2\u003e\n\u003cp\u003eThe alternator turns the engine into a charging source for the battery bank. On a modern boat, it's not just about replacing an engine part: the alternator must be compatible with the system voltage, battery bank capacity, battery type, regulator, engine compartment ventilation, and belt drive.\u003c\/p\u003e\n\n\u003ch3\u003e12V or 24V: based on the onboard architecture\u003c\/h3\u003e\n\u003cp\u003eThe first criterion is system voltage. A 12V boat is not sized the same way as a 24V installation, and the rated current does not tell the whole story: actual power also depends on voltage, engine RPM, and the alternator's ability to sustain charging over time.\u003c\/p\u003e\n\u003cp\u003eFor a 12V system, the \u003ca href=\"\/en-us\/products\/mastervolt-alternateur-alpha-12-130-iii-regulateur-alpha-pro\"\u003eAlpha 12\/130 III alternator with Alpha Pro III regulator\u003c\/a\u003e provides a complete solution with external regulation. Compact models like the \u003ca href=\"\/en-us\/products\/mastervolt-alternateur-alpha-compact-14-120-alpha-pro-iii\"\u003eAlpha Compact 14\/120\u003c\/a\u003e, \u003ca href=\"\/en-us\/products\/mastervolt-alternateur-alpha-compact-14-140-vp-alpha-pro-iii-12v\"\u003eAlpha Compact 14\/140 VP\u003c\/a\u003e, or \u003ca href=\"\/en-us\/products\/mastervolt-alternateur-alpha-compact-14-200-alpha-pro-iii-12v\"\u003eAlpha Compact 14\/200\u003c\/a\u003e address different power, space, and engine mounting constraints.\u003c\/p\u003e\n\n\u003ch3\u003e24V alternators and high-capacity battery banks\u003c\/h3\u003e\n\u003cp\u003e24V systems are common on power-hungry boats or heavier electrical architectures. They reduce current for a given power, but require strict compatibility between alternator, regulator, wiring, batteries, and protections.\u003c\/p\u003e\n\u003cp\u003eIn this range, the \u003ca href=\"\/en-us\/products\/mastervolt-alternateur-alpha-24v-110a-energie\"\u003eAlpha 24V 110A\u003c\/a\u003e, \u003ca href=\"\/en-us\/products\/mastervolt-alternateur-alpha-24v-150a-evo-alpha-pro-iii-masterbus\"\u003eAlpha 24V 150A EVO with Alpha Pro III\u003c\/a\u003e, \u003ca href=\"\/en-us\/products\/mastervolt-alternateur-alpha-compact-28-110-alpha-pro-iii-24v\"\u003eAlpha Compact 28\/110 with Alpha Pro III\u003c\/a\u003e, and \u003ca href=\"\/en-us\/products\/mastervolt-alternateur-alpha-compact-28-150-regulateur-alpha-pro-iii\"\u003eAlpha Compact 28\/150 with Alpha Pro III regulator\u003c\/a\u003e cover most high-capacity charging needs.\u003c\/p\u003e\n\n\u003ch3\u003eExternal regulation and battery type\u003c\/h3\u003e\n\u003cp\u003eA powerful alternator with poor regulation can charge too slowly, overheat unnecessarily, or stress batteries. The external regulator adjusts voltage and charging strategy to the installed bank. This is especially important with AGM, gel, or lithium batteries, which have different thresholds and behaviors than open-lead batteries.\u003c\/p\u003e\n\u003cp\u003eThe \u003ca href=\"\/en-us\/products\/mastervolt-regulateur-charge-alpha-pro-iii-electricite\"\u003eAlpha Pro III charge regulator\u003c\/a\u003e optimizes alternator charging and manages charging strategy. The \u003ca href=\"\/en-us\/products\/mastervolt-capteur-temperature-alternateur-cable-2m\"\u003ealternator temperature sensor\u003c\/a\u003e helps protect the system from overheating. To monitor the actual impact of charging on the bank, \u003ca href=\"\/en-us\/collections\/moniteurs-de-batterie\"\u003ebattery monitors\u003c\/a\u003e are a useful addition.\u003c\/p\u003e\n\n\u003ch3\u003eMounting, pulley, wiring, and protection\u003c\/h3\u003e\n\u003cp\u003eMechanical compatibility is as important as power output. Check mounting type, belt alignment, pulley diameter, available ventilation, cable cross-section, and circuit protection. A slipping belt, undersized cable, or poor ground can negate the benefits of a high-output alternator.\u003c\/p\u003e\n\u003cp\u003eAccessories like the \u003ca href=\"\/en-us\/products\/mastervolt-kit-cablage-alpha-pro\"\u003eAlpha Pro wiring kit\u003c\/a\u003e, \u003ca href=\"\/en-us\/products\/mastervolt-kit-6-bagues-isolation-alternateur-alpha-compact\"\u003eAlpha Compact insulation ring kit\u003c\/a\u003e, the \u003ca href=\"\/en-us\/products\/mastervolt-poulie-multi-gorges-6-alternateur-alpha\"\u003e6-groove pulley for Alpha\u003c\/a\u003e, or the \u003ca href=\"\/en-us\/products\/mastervolt-poulie-multi-gorges-8-48-1mm-electricite-marine\"\u003e8-groove Ø48.1 mm\u003c\/a\u003e and \u003ca href=\"\/en-us\/products\/mastervolt-poulie-multi-gorges-8-diametre-56mm-alternateur\"\u003e8-groove Ø56 mm\u003c\/a\u003e pulleys help ensure a reliable alternator installation.\u003c\/p\u003e\n\n\u003ch3\u003eBefore choosing\u003c\/h3\u003e\n\u003cp\u003eCheck the system voltage, engine type, available mounting, operating RPM, battery bank capacity, battery chemistry, and space in the engine compartment. Also verify wiring, protection, ventilation, and whether an external regulator is needed. To integrate the alternator into the full system, see the \u003ca href=\"\/en-us\/collections\/production\"\u003eProduction\u003c\/a\u003e, \u003ca href=\"\/en-us\/collections\/batteries\"\u003eBatteries\u003c\/a\u003e, \u003ca href=\"\/en-us\/collections\/stockage\"\u003eStorage\u003c\/a\u003e, and \u003ca href=\"\/en-us\/collections\/electricite\"\u003eElectrical\u003c\/a\u003e collections.\u003c\/p\u003e","products":[{"product_id":"integrel-plaque-adaptation-yanmar-jh-cr-45-57","title":"Yanmar JH-CR 45\/57 adapter plate","description":"\u003cp\u003eThe \u003cstrong\u003eIntegrel adapter plate for Yanmar JH-CR 45\/57\u003c\/strong\u003e is a high-precision mechanical component essential for installing the Integrel power generation system on Yanmar marine engines with common rail injection rated at 45 and 57 horsepower. This part ensures the structural connection between the original engine block and the high-power generator.\u003c\/p\u003e\n\u003ch3\u003eCustom engineering for Yanmar engines\u003c\/h3\u003e\n\u003cp\u003eUnlike universal mounts often prone to vibration, this plate is specifically machined to fit the exact mounting points of the Yanmar JH-CR 45 and 57 models. It guarantees perfect geometric alignment of the drive belt. This level of precision is critical to efficiently transfer mechanical power to the Integrel system without imposing asymmetric loads on the engine or generator bearings.\u003c\/p\u003e\n\u003ch3\u003eMechanical reliability in marine environments\u003c\/h3\u003e\n\u003cp\u003eDesigned to meet the demands of high-capacity power management systems, this mounting plate withstands the high torque generated during rapid battery bank charging. It forms the fundamental foundation for reliable onboard electricity production, thereby securing your overall energy management installation investment.\u003c\/p\u003e","brand":"Integrel","offers":[{"title":"Default Title","offer_id":53723759247700,"sku":"ISD0008","price":2650.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0988\/3274\/4788\/files\/integrel-edrive-cover_57725522-ddb9-4052-ad64-937726f183b6.png?v=1780004689"},{"product_id":"integrel-plaque-adaptation-yanmar-sail-drive-sd60-5","title":"Yanmar Sail Drive SD60-5 adapter plate","description":"\u003cp\u003eThe Integrel Yanmar Sail Drive SD60-5 adapter plate (reference ISD0013) is a mechanical transmission component designed for integrating the power generation system with your marine engine. Machined in the United Kingdom, it ensures a rigid mount and perfect alignment between the Integrel high-power generator and the Yanmar SD60-5 Sail Drive transmission.\u003c\/p\u003e\n\n\u003ch3\u003eReliability and mechanical integration\u003c\/h3\u003e\n\u003cp\u003eThe Integrel system replaces a traditional generator by harnessing the excess power from the propulsion engine. Unlike standard or universal alternator mounts that can generate vibrations, this plate is specifically sized to withstand the mechanical stresses and high torque of the Integrel system. It guarantees optimal energy transfer without compromising the integrity of the Yanmar engine.\u003c\/p\u003e\n\n\u003ch3\u003eMounting specifications for SD60-5\u003c\/h3\u003e\n\u003cp\u003eDesigned exclusively for Yanmar Sail Drive SD60-5 stern drives, this adapter plate prevents premature wear of belts and bearings. By ensuring exact mounting geometry, it secures the installation of your onboard energy management system for extended and demanding sailing.\u003c\/p\u003e","brand":"Integrel","offers":[{"title":"Default Title","offer_id":53723759640916,"sku":"ISD0013","price":2564.52,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0988\/3274\/4788\/files\/integrel-edrive-cover_9f262098-39cf-4885-a240-098917128d8f.png?v=1780004692"},{"product_id":"mastervolt-kit-6-bagues-isolation-alternateur-alpha-compact","title":"Kit of 6 insulation rings for Mastervolt Alpha Compact alternator","description":"\u003cp\u003eThis kit of 6 \u003cstrong\u003eMASTERVOLT\u003c\/strong\u003e insulation rings is an essential accessory for the correct installation of the Alpha Compact alternator. Designed to ensure optimal electrical isolation between the alternator and its engine mount, these rings prevent parasitic ground currents and electromagnetic interference that can disrupt sensitive onboard electronic systems. Made from high-quality composite insulating material, they provide mechanical and thermal resistance suited to the environment of an engine room.\u003c\/p\u003e\n\n\u003ch3\u003eCompatibility and positioning within the Mastervolt range\u003c\/h3\u003e\n\u003cp\u003eThe insulation rings are specifically designed for the \u003cstrong\u003eMastervolt Alpha Compact\u003c\/strong\u003e alternator, a model from the Dutch manufacturer’s high-performance alternator range. This kit of 6 rings is the replacement solution to maintain the integrity of the electrical installation. Unlike older alternators or Beta range models, the Alpha Compact requires this type of isolation to operate reliably with Mastervolt battery chargers and regulators. This kit is an essential consumable for any owner of an Alpha Compact alternator.\u003c\/p\u003e","brand":"Mastervolt","offers":[{"title":"Default Title","offer_id":53723869315412,"sku":"48420242","price":162.7,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0988\/3274\/4788\/files\/main-square_e3e26631-8675-4e6d-a20e-d492e0382629.jpg?v=1778084028"},{"product_id":"mastervolt-alternateur-alpha-12-130-iii-regulateur-alpha-pro","title":"Alpha 12\/130 III Alternator with Alpha Pro III","description":"\u003cp\u003eDesigned to meet the energy requirements of modern vessels, the \u003cstrong\u003eAlpha 12\/130 III alternator\u003c\/strong\u003e from \u003cstrong\u003eMastervolt\u003c\/strong\u003e turns your engine into a high-performance energy source. Unlike standard alternators that require high engine speeds to deliver their rated capacity, this 130 A model is specifically optimized to provide full charging power even at low speeds. It offers a silent and efficient alternative to installing a generator, particularly when used as a secondary alternator in combination with a high-capacity battery bank.\u003c\/p\u003e\n\n\u003ch3\u003eSmart regulation with Alpha Pro III\u003c\/h3\u003e\n\u003cp\u003eThe integrated \u003cstrong\u003eAlpha Pro III\u003c\/strong\u003e charge regulator ensures optimal efficiency and extends battery life. With its 3-stage charging process (Absorption at 14.25 V and Float at 13.25 V), this system is compatible with lead-acid and lithium-ion battery banks. The regulator precisely controls output voltage and current, preventing overcharging while ensuring fast recharging. Adding a Battery Mate-type charge distributor allows simultaneous management of multiple banks (start and service) safely.\u003c\/p\u003e\n\n\u003ch3\u003eMechanical and thermal design for marine environments\u003c\/h3\u003e\n\u003cp\u003eWeighing 10.1 kg and featuring an insulated design, this 12 VDC alternator is built for harsh environments. Its bidirectional fan provides powerful forced cooling, enabling it to maintain high performance even in engine rooms where temperatures exceed 40 °C. Supplied as standard with a double V-belt pulley (2xA section, 89 mm nominal diameter) and featuring a \"six o'clock\" mounting type, it adapts to many engine mounts. Unlike the Alpha Compact range, the classic Alpha series offers bidirectional rotation, facilitating integration into a wider variety of mechanical configurations.\u003c\/p\u003e","brand":"Mastervolt","offers":[{"title":"Default Title","offer_id":53723874689364,"sku":"48612130","price":1035.94,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0988\/3274\/4788\/files\/main-square_838c21e8-4465-42fd-80c5-6672b3f34442.jpg?v=1778053269"},{"product_id":"mastervolt-alternateur-alpha-24v-110a-energie","title":"Alpha 24 V 110 A Alternator","description":"\u003cp\u003e\n    L'alternateur Mastervolt Alpha 24V 110A (référence 48224110) est conçu pour les systèmes énergétiques marins exigeants, offrant une solution de charge haute performance pour les parcs de batteries de servitude en 24V. Avec un courant de sortie de 110A, il assure une recharge rapide et efficace.\n\u003c\/p\u003e\n\n\u003ch3\u003eIntégration et compatibilité moteur\u003c\/h3\u003e\n\u003cp\u003e\n    Cet alternateur se distingue par sa flexibilité d'intégration sur diverses motorisations. Il peut être monté comme second alternateur sur les moteurs Volvo Penta D4 (D4-180I-F à D4-300I-F) et D6 (D6-280I-A à D6-435I-WJ-F) avec le support Volvo Penta numéro 3584501. De même, sur les moteurs MD20 (MD2010C à MD2040D), il s'installe en tant que second alternateur via le support Volvo Penta numéro 3581049.\n\u003c\/p\u003e\n\u003cp\u003e\n    Pour les moteurs Volvo Penta D2 (D2-55C à D2-75F), l'alternateur Alpha 24V 110A peut remplacer l'alternateur standard. Cette configuration nécessite un kit spécifique (Volvo Penta numéro 3885212) qui permet de déplacer l'alternateur d'origine pour alimenter le moteur. Un faisceau de câbles supplémentaire (Volvo Penta numéro 3886482) est requis pour connecter l'alternateur 12V standard dans sa nouvelle position. Sur les moteurs de la série 2000 (2002, 2003, 2003T, etc.), l'alternateur Mastervolt Alpha peut également être monté en remplacement, avec des ajustements nécessaires. Le modèle 24V 110A pèse 10,1 kg, garantissant une construction robuste adaptée aux environnements marins.\n\u003c\/p\u003e\n\n\u003ch3\u003ePositionnement dans la gamme Alpha\u003c\/h3\u003e\n\u003cp\u003e\n    L'alternateur Alpha 24V 110A s'inscrit dans la gamme complète d'alternateurs Alpha de Mastervolt, qui comprend également les modèles 12\/90A, 12\/130A, 24\/75A et 24\/150A. Cette diversité permet d'adapter la solution de charge aux besoins spécifiques de chaque installation, que ce soit en termes de tension ou de puissance. Bien que la documentation technique date de 2013, le produit est toujours référencé avec un tarif 2025 Q2, confirmant sa pertinence et sa disponibilité actuelle sur le marché, comme une alternative performante aux alternateurs d'origine ou pour l'ajout de capacité de charge dédiée à la servitude. Il n'est pas conçu comme une pièce de rechange universelle mais comme un composant d'optimisation énergétique, nécessitant des supports et kits d'installation spécifiques non inclus avec l'alternateur lui-même.\n\u003c\/p\u003e","brand":"Mastervolt","offers":[{"title":"Default Title","offer_id":53723874885972,"sku":"48224110","price":1048.39,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0988\/3274\/4788\/files\/main-square_17d4dda1-5702-4a71-8bca-df6eccff2394.jpg?v=1778059834"},{"product_id":"mastervolt-alternateur-alpha-24v-150a-evo-alpha-pro-iii-masterbus","title":"Alpha 24 V 150 A EVO Alternator with Alpha Pro III","description":"\u003cp\u003e\n    The \u003cstrong\u003eMastervolt Alpha 24V 150A EVO\u003c\/strong\u003e alternator, paired with the \u003cstrong\u003eAlpha Pro III\u003c\/strong\u003e charge regulator, is a high-efficiency marine power generation solution designed to replace the use of a diesel generator. Unlike first-fit models that require high engine RPM, this unit is specifically calibrated to deliver maximum charging current at low RPM and idle. This system ensures rapid and complete charging of service and starting battery banks.\n\u003c\/p\u003e\n\n\u003ch3\u003eElectrical performance and intelligent regulation\u003c\/h3\u003e\n\u003cp\u003e\n    This model delivers a total current of 150 A at a system voltage of 24 VDC. Control is provided by the Alpha Pro III regulator (firmware version 4.0 or higher), which enforces a 3+ stage intelligent charging cycle. Setpoint voltages are fixed at 28.5 V for absorption and 26.5 V for float (measured at 25°C). The system includes a temperature probe for thermal compensation of the charge, thus optimizing the lifespan of lead-acid and lithium-ion battery banks. It also integrates the \"Keep Alive\" function and natively communicates via the MasterBus protocol, enabling configuration, real-time monitoring, alarm management, and event history, particularly when paired with a MasterShunt. The connection between the alternator and the regulator is via a 1.5-meter hydrocarbon-resistant marine-grade cable supplied as standard.\n\u003c\/p\u003e\n\n\u003ch3\u003eMechanical specifications and thermal tolerance\u003c\/h3\u003e\n\u003cp\u003e\n    The alternator weighs 13.1 kg and operates with electrical isolation from ground. It features bidirectional rotation, adapting to various engine configurations. To efficiently transmit power without premature wear, it is equipped with a double pulley (2xA belt section) with a nominal diameter of 89 mm. Thermal management is ensured by a forced-cooling system via an integrated pulley fan, maintaining output power even in engine compartments where ambient temperature exceeds 40°C. Mounting options are flexible thanks to multiple mounting points (positions five to six, six o’clock, and five after six), facilitating installation on custom mounts.\n\u003c\/p\u003e\n\n\u003ch3\u003ePositioning and technical comparison\u003c\/h3\u003e\n\u003cp\u003e\n    Within the Mastervolt range, the Alpha 24\/150 EVO stands as the \"heavy-duty\" solution compared to lower-capacity models like the 24\/75, doubling the charging capacity for vessels with high energy demands (air conditioning, watermakers). Compared to standard OEM alternators, the Alpha EVO eliminates the issue of voltage collapse at high temperatures. When compared to direct competitors such as the Balmar XT or AT series, Mastervolt’s positioning stands out due to native and seamless integration with the MasterBus ecosystem without requiring additional gateways, as well as the systematic inclusion of the external Alpha Pro III regulator. Paired with a Battery Mate distributor, this alternator can simultaneously charge up to three separate battery banks with near-zero voltage drop.\n\u003c\/p\u003e","brand":"Mastervolt","offers":[{"title":"Default Title","offer_id":53723875082580,"sku":"48624152","price":1926.38,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0988\/3274\/4788\/files\/main-square_d08edc29-ac8d-45d2-b1be-13875cdee7c0.jpg?v=1778059840"},{"product_id":"mastervolt-alternateur-alpha-compact-14-120-alpha-pro-iii","title":"Alpha Compact 14\/120 Alternator with Alpha Pro III","description":"\u003ch3\u003eAlpha Compact 14\/120 Alternator with Alpha Pro III Regulator\u003c\/h3\u003e\n\u003cp\u003e\n    The \u003cstrong\u003eAlpha Compact 14\/120 Alternator\u003c\/strong\u003e by \u003cstrong\u003eMastervolt\u003c\/strong\u003e (reference 46614120) is a high-performance charging system designed for marine and mobile energy storage installations. Operating on a 12 V network (14 V charging voltage) with a 120 A output current, it is specifically optimized to deliver high power continuously, even at low engine speeds (idle). The unit weighs 6.7 kg and features an open construction with an integrated dual internal fan for optimal cooling, even in high ambient temperature environments.\n\u003c\/p\u003e\n\n\u003ch3\u003eComparison with standard alternators and the Alpha range\u003c\/h3\u003e\n\u003cp\u003e\n    Unlike OEM alternators installed by default by engine manufacturers, or Mastervolt’s standard Alpha range, the \u003cstrong\u003eAlpha Compact\u003c\/strong\u003e series stands out with a 25 % smaller footprint and 40 % lighter weight. Its patented magnetic design reduces fuel consumption by 30 to 40 % compared to equivalent competitors. Designed to fit directly onto factory power take-off (PTO) mounts, it offers a superior alternative to basic alternators, capable of handling the intensive charging cycles required by modern service battery banks.\n\u003c\/p\u003e\n\n\u003ch3\u003eTechnical specifications and wiring\u003c\/h3\u003e\n\u003cp\u003e\n    This alternator features a clockwise rotation direction and is mounted using a swivel arm. It includes two M8 positive output studs, an isolated W (RPM) signal connection via Faston terminal, and a dedicated Mastervolt connector for excitation current. By default, the system is not galvanically isolated (negative pole connected to the housing), but isolated operation is possible by installing optional insulating sleeves. Cables and electronics are sealed against oil, moisture, and contaminants. Note that the multi-groove free-wheel pulley is not included, allowing selection of the exact diameter suited to the installation.\n\u003c\/p\u003e\n\n\u003ch3\u003eAdvanced regulation with Alpha Pro III and MasterBus compatibility\u003c\/h3\u003e\n\u003cp\u003e\n    The package includes the \u003cstrong\u003eAlpha Pro III\u003c\/strong\u003e charge regulator (firmware 4.0 or higher), which transforms this alternator into a true three-stage (Bulk, Absorption, Float) smart charger. It is compatible with lead-acid, Gel, AGM, and Lithium-Ion battery banks. The charging process is temperature-compensated via an integrated probe (RJ12 connection) to prevent overcharging. The Alpha Pro III is fully connectable to the MasterBus network for real-time monitoring of RPM, charge state, and alarm configuration. It also features an engine load balancing function to reduce mechanical wear and a \"Keep alive\" function ensuring reliable signal transmission to the onboard tachometer.","brand":"Mastervolt","offers":[{"title":"Default Title","offer_id":53723875246420,"sku":"46614120","price":2081.93,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0988\/3274\/4788\/files\/main-square_e9daf780-7bec-49ab-91a9-36c563fad4ae.jpg?v=1778053088"},{"product_id":"mastervolt-alternateur-alpha-compact-14-140-vp-alpha-pro-iii-12v","title":"Alpha Compact 14\/140 VP Alternator with Alpha Pro III","description":"\u003cp\u003eThe \u003cstrong\u003eAlpha Compact 14\/140 VP\u003c\/strong\u003e alternator from \u003cstrong\u003eMastervolt\u003c\/strong\u003e is a high-performance marine energy production solution, specifically designed to fit Volvo Penta engines via its saddle mount. Delivering a nominal current of 140 A at a 12 V system voltage, it stands out from the standard Alpha series with its reduced footprint and optimized cooling thanks to an integrated dual-fan system, allowing it to operate up to 120 °C. For its drive, this alternator requires a 4.8 kW power take-off (PTO) on the engine.\u003c\/p\u003e\n\u003ch3\u003eIntegrated Alpha Pro III smart regulator\u003c\/h3\u003e\n\u003cp\u003eThis kit includes the advanced \u003cstrong\u003eAlpha Pro III\u003c\/strong\u003e charge regulator, turning this alternator into a three-stage smart charger (Bulk, Absorption, Float). Unlike standard regulators, it automatically compensates the charging voltage based on temperature (-30 mV\/°C at 12 V) to effectively protect battery banks (lead, gel, AGM, or lithium-ion). Fully compatible with the MasterBus communication network via its two RJ-45 ports, it provides complete system monitoring, including alternator temperature, excitation current, and voltage alarms, facilitating integration with other equipment such as the MasterShunt.\u003c\/p\u003e\n\u003ch3\u003eReady for installation\u003c\/h3\u003e\n\u003cp\u003eThe Alpha Compact 14\/140 VP alternator is supplied ready-to-use with a standard pulley for 8-rib multi-groove belt (48.1 mm diameter). The kit also includes a hydrocarbon-resistant wiring harness, a battery temperature sensor, and robust connections, including an M8 stud for the positive terminal. While not isolated by default, an insulating bushing kit is available as an option for systems requiring strict galvanic isolation.\u003c\/p\u003e","brand":"Mastervolt","offers":[{"title":"Default Title","offer_id":53723875410260,"sku":"46614142","price":1997.85,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0988\/3274\/4788\/files\/main-square_643623ab-fed6-4f4b-a2c3-97445cd0887b.jpg?v=1778053117"},{"product_id":"mastervolt-alternateur-alpha-compact-14-200-alpha-pro-iii-12v","title":"Alpha Compact 14\/200 Alternator with Alpha Pro III","description":"\u003cp\u003eThe \u003cstrong\u003eAlpha Compact 14\/200\u003c\/strong\u003e alternator from \u003cstrong\u003eMastervolt\u003c\/strong\u003e is the ultimate solution for high-energy demands onboard. Designed specifically for demanding marine environments, it delivers a powerful nominal current of 200 A at 12 V, ensuring rapid charging of your battery banks, whether they are lead-acid (acid, gel, AGM) or lithium-ion. Unlike standard alternators that require high engine speeds, the Alpha Compact provides exceptional output even at low speeds (generation speed at 1350 rpm), making it ideal for harbor maneuvers or extended anchoring.\u003c\/p\u003e\n\u003ch3\u003eAlpha Pro III charge regulator included\u003c\/h3\u003e\n\u003cp\u003eThis model comes standard with the intelligent \u003cstrong\u003eAlpha Pro III\u003c\/strong\u003e charge regulator, which optimizes the process through its three-stage charging algorithm (Bulk, Absorption, Float). It automatically adjusts the voltage (up to 14.25 V in Bulk and Absorption) and compensates for temperature (-30 mV\/°C at 12 V) thanks to the supplied battery temperature sensor. This preserves the lifespan of your batteries while maximizing energy efficiency. Additionally, its full integration with the MasterBus network allows for advanced monitoring and configuration from a display or centralized system.\u003c\/p\u003e\n\u003ch3\u003eRobust design and thermal performance\u003c\/h3\u003e\n\u003cp\u003eEquipped with a patented magnetic design and optimized cooling, the Alpha Compact 14\/200 alternator supports a maximum operating temperature of 120 °C. With a compact weight of 7.5 kg and a power input of 5.6 kW (7.6 HP), it fits perfectly into compact engine compartments. Its ability to withstand rotation speeds up to 20,000 rpm makes it an extremely reliable and durable piece of equipment compared to standard Alpha models, positioning it as a top choice for demanding sailors.","brand":"Mastervolt","offers":[{"title":"Default Title","offer_id":53723875606868,"sku":"46614200","price":2226.39,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0988\/3274\/4788\/files\/main-square_d978d8b9-f4e2-472d-9893-601a0ddf7052.jpg?v=1778053146"},{"product_id":"mastervolt-alternateur-alpha-compact-28-110-24v","title":"Alpha Compact 28\/110 Alternator","description":"\u003cp\u003eMastervolt’s Alpha Compact 28\/110 alternator is a high-performance energy generation solution designed specifically for demanding marine environments. Capable of continuous operation under the high temperatures of an engine room, this 24V model delivers 110A to ensure rapid charging of your service and starter battery banks. Unlike standard alternators often limited by heat, the Alpha Compact series maintains optimal mechanical and electrical efficiency even at full load.\u003c\/p\u003e\n\u003ch3\u003eIntegration and charge regulation\u003c\/h3\u003e\n\u003cp\u003eThis model is designed to operate in synergy with the external Alpha Pro charge regulator (sold separately). This combination enables a precise 3-stage charging algorithm, essential for maximizing the lifespan and performance of lead-acid and lithium-ion (Li-ion) battery banks. Whether used as a primary or secondary alternator, it converts your engine’s mechanical power into a reliable and regulated electrical energy source.\u003c\/p\u003e\n\u003ch3\u003eMechanical specifications and installation\u003c\/h3\u003e\n\u003cp\u003eMastervolt’s Alpha Compact 28\/110 alternator weighs 7.4 kg and requires clockwise rotation (viewed from the pulley side) to ensure proper operation of its internal cooling fans. Unlike the classic Alpha series (such as the standard 24\/110), which features a bidirectional fan, rotation direction is critical here. Additionally, this model is supplied as standard non-insulated (grounded to the housing) and without a pulley. For engines requiring insulated mounting to protect onboard electronics, the optional insulating bushing kit (reference 48420242) must be used, which will reduce the diameter of the mounting holes when installed on the mounting bracket.\u003c\/p\u003e","brand":"Mastervolt","offers":[{"title":"Default Title","offer_id":53723875770708,"sku":"46228110","price":1636.48,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0988\/3274\/4788\/files\/main-square_3a1e59b6-e087-4a89-9e23-6557959eeb97.jpg?v=1778053003"},{"product_id":"mastervolt-alternateur-alpha-compact-28-110-alpha-pro-iii-24v","title":"Alpha Compact 28\/110 Alternator with Alpha Pro III","description":"\u003cp\u003e\n    The \u003cstrong\u003eMastervolt Alpha Compact 28\/110\u003c\/strong\u003e alternator (part number 46628110) is a 24 V DC charging system designed for marine, mobile, and industrial applications requiring continuous power supply. It is supplied as standard with the external Alpha Pro III charge regulator, forming a complete solution compatible with the MasterBus network. This equipment enables rapid charging of service battery banks while powering onboard electrical consumers.\n\u003c\/p\u003e\n\n\u003ch3\u003ePositioning and comparison\u003c\/h3\u003e\n\u003cp\u003e\n    Unlike original alternators installed by engine manufacturers, which are often limited at low RPM, the Alpha Compact 28\/110 is specifically wound to deliver high charging current even at idle. Compared to the standard Mastervolt Alpha range, this Compact series features an automotive-style design that reduces volume by 25% and weight by 40%, while cutting fuel consumption by up to 30% thanks to improved efficiency. Within its own range, this standard model differs from the \"VP\" (Volvo Penta) version by the absence of an included pulley. This design choice allows the installation of a multi-groove free-wheel pulley with a diameter matching the target installation’s speed ratio.\n\u003c\/p\u003e\n\n\u003ch3\u003eElectrical and thermal specifications\u003c\/h3\u003e\n\u003cp\u003e\n    This alternator delivers a nominal current of 110 A at 6,000 RPM and 25 °C. Its charging capacity at idle reaches approximately 41 A at 1,800 RPM. The startup speed is set at 1,400 RPM, with a maximum tolerated speed of 15,000 RPM. It requires a power take-off (PTO) of 6.2 kW (8.3 hp). The unit is designed to operate in confined engine rooms, with a maximum operating temperature of 120 °C. Cooling is provided by an open design featuring a dual internal fan and a patented magnetic circuit that optimizes thermal dissipation.\n\u003c\/p\u003e\n\n\u003ch3\u003eAlpha Pro III Regulation and MasterBus Compatibility\u003c\/h3\u003e\n\u003cp\u003e\n    The alternator is controlled by the included Alpha Pro III regulator (firmware 4.0 or higher). This device uses a three-stage charging cycle (Bulk, Absorption, Float) that compensates for voltage drops and adjusts current based on real-time needs. The system supports all battery chemistries: flooded lead-acid, GEL, AGM, and Lithium-Ion. Native integration with the MasterBus protocol allows configuration of charging parameters, real-time monitoring, event history, and system alarm settings for the power production setup.\n\u003c\/p\u003e\n\n\u003ch3\u003eMechanical Design and Connectivity\u003c\/h3\u003e\n\u003cp\u003e\n    Weighing 7.4 kg, the alternator has a clockwise rotation direction and is mounted via a swivel arm, simplifying installation as a secondary alternator on original PTO mounts. The electronic components and wiring are protected against oil, moisture, and dust. The chassis is uninsulated by default; galvanic isolation requires optional rings. Connection interfaces include two M8 studs for the positive output, an insulated Fast-on terminal for the W signal (tachometer), a Mastervolt-specific port for excitation current, and an RJ12 port for connecting the alternator’s integrated temperature sensor.\n\u003c\/p\u003e","brand":"Mastervolt","offers":[{"title":"Default Title","offer_id":53723875934548,"sku":"46628110","price":1886.74,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0988\/3274\/4788\/files\/main-square_6f763b2e-db7b-4a65-b2f8-929446d36744.jpg?v=1778053176"},{"product_id":"mastervolt-alternateur-alpha-compact-28-110-vp-24v-110a","title":"Alpha Compact 28\/110 VP Alternator","description":"\u003cp\u003eThe Mastervolt Alpha Compact 28\/110 VP alternator is a high-performance charging solution designed specifically for demanding marine environments. Operating on a 24V system, it delivers a nominal current of 110 A with an impressive output of 6.2 kW (8.3 HP). Engineered to fit perfectly on Volvo Penta engines via its gimbal arm mounting, this alternator ensures rapid and efficient charging of your battery bank, starting from a generation speed of 1400 RPM and up to a maximum rotation speed of 15000 RPM. Note that this model is supplied without the Alpha Pro III charge regulator, which remains necessary for optimal voltage management.\u003c\/p\u003e\n\u003ch3\u003eThermal design and compactness\u003c\/h3\u003e\n\u003cp\u003eUnlike the classic Alpha series alternators, which are heavier and bulkier, the Alpha Compact range features a patented magnetic design that maintains compact dimensions while withstanding high temperatures. Weighing 7.4 kg, this model includes a dual cooling fan system, allowing it to operate safely up to a maximum temperature of 120 °C. This advanced thermal management ensures continuous energy production, even in the most confined and poorly ventilated engine compartments.\u003c\/p\u003e\n\u003ch3\u003eConnectivity and system integration\u003c\/h3\u003e\n\u003cp\u003eThe electrical installation of the Alpha Compact 28\/110 VP alternator is simplified by robust connections compliant with marine standards. It features two M8 positive output terminals, a W-signal connection via insulated lug, and a dedicated Mastervolt socket for induced current. Temperature monitoring is ensured by an integrated sensor with an RJ12 connector, enabling seamless communication with the electrical network once paired with the appropriate regulator. Although it is not galvanically isolated and rotates clockwise, its mechanical design makes it an ideal upgrade for propulsion systems requiring high charging capacity.\u003c\/p\u003e","brand":"Mastervolt","offers":[{"title":"Default Title","offer_id":53723876098388,"sku":"46228112","price":1655.71,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0988\/3274\/4788\/files\/main-square_6d912181-5d71-4677-8dcb-1e4cd0c03afe.jpg?v=1778053033"},{"product_id":"mastervolt-alternateur-alpha-compact-28-150-regulateur-alpha-pro-iii","title":"Alpha Compact 28\/150 alternator, Alpha Pro III regulator included","description":"\u003cp\u003e\n    The \u003cstrong\u003eMastervolt Alpha Compact 28\/150\u003c\/strong\u003e alternator (part number 46628150) is a high-capacity 24 V charging system designed for marine and industrial electrical installations. Supplied without a pulley, this model uses a specific magnetic design that reduces its volume by 25 % and its weight by 40 % compared to conventional alternators. It is provided with the external \u003cstrong\u003eAlpha Pro III\u003c\/strong\u003e charge regulator to ensure precise control of the charging cycle for all types of battery banks.\n\u003c\/p\u003e\n\n\u003ch3\u003eElectromechanical and thermal performance\u003c\/h3\u003e\n\u003cp\u003e\n    This model delivers a nominal current of 150 A at 6000 rpm (at 25 °C) and guarantees a production of 28 A at idle engine speed of 1800 rpm. The starting rotation speed is set at 1700 rpm, with a maximum tolerance of 16000 rpm. The mechanical power required on the power take-off (PTO) is 8.4 kW (11.4 hp). Cooled by a double internal fan within an open structure, the alternator supports an operating temperature of up to 120 °C. An integrated temperature probe with RJ12 connection ensures active thermal regulation. The electrical connections include two M8 positive output terminals, an isolated W-signal connection for the tachometer, and a proprietary Mastervolt connector for the excitation current. The net weight of the alternator is 7.9 kg, with a total packaged weight of 11.4 kg.\n\u003c\/p\u003e\n\n\u003ch3\u003eAlpha Pro III regulation and MasterBus integration\u003c\/h3\u003e\n\u003cp\u003e\n    The \u003cstrong\u003eAlpha Pro III\u003c\/strong\u003e regulator controls the output voltage via a three-stage charging algorithm (Bulk, Absorption, Float). This device compensates for temperature and optimizes charging for lead-acid, Gel, AGM, and lithium-ion batteries. The absorption phase is automatically timed (approximately 30 minutes for lithium-ion technology) before switching to float voltage. This regulator natively integrates the MasterBus communication protocol, enabling configuration of voltage thresholds, real-time charge data monitoring, and alarm management directly from the onboard network.\n\u003c\/p\u003e\n\n\u003ch3\u003ePositioning within the range and comparison\u003c\/h3\u003e\n\u003cp\u003e\n    Within the \u003cstrong\u003eMastervolt\u003c\/strong\u003e catalog, the Alpha Compact series stands out from the standard Alpha range with an optimized power-to-size ratio and an estimated 30 % reduction in fuel consumption. Compared to competing equipment such as the 24 V Balmar XT series, the \u003cstrong\u003eMastervolt Alpha Compact 28\/150\u003c\/strong\u003e offers the advantage of direct software integration thanks to the regulator's native MasterBus network, eliminating the need for additional data conversion gateways. Its lightweight design is specifically intended for cramped engine compartments requiring high continuous charging power, where a traditional 150 A alternator would be too heavy or bulky.\n\u003c\/p\u003e","brand":"Mastervolt","offers":[{"title":"Default Title","offer_id":53723876294996,"sku":"46628150","price":2288.6,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0988\/3274\/4788\/files\/main-square_a3d5ed0c-6966-44f4-b8cd-0a0e7bb3e810.jpg?v=1778053194"},{"product_id":"mastervolt-alternateur-alpha-compact-28-150-sans-poulie","title":"Alpha Compact 28\/150 alternator (without pulley)","description":"\u003cp\u003eMastervolt’s Alpha Compact 28\/150 alternator is a high-performance charging solution designed for vessels equipped with large-capacity 24V battery banks. With a 150-amp output current, this model ensures fast and optimal recharging, even at low engine speeds.\u003c\/p\u003e\n\n\u003ch3\u003eCompact design and power-to-weight ratio\u003c\/h3\u003e\n\u003cp\u003eDistinct from the standard Alpha series due to its reduced footprint, the Alpha Compact range was developed to fit in tight engine compartments. Weighing just 7.9 kg, this 28\/150 model delivers exceptional power density. Its internal architecture promotes efficient thermal cooling, allowing it to sustain high continuous charging currents without overheating the generator.\u003c\/p\u003e\n\n\u003ch3\u003eSystem integration and compatibility\u003c\/h3\u003e\n\u003cp\u003eThis specific model ships without a pulley, providing the technical flexibility to install a custom pulley, such as a multi-groove (serpentine) belt, perfectly aligned with your engine’s mechanical configuration. To fully utilize its capabilities and ensure battery safety (especially for Lithium-Ion banks), this alternator must be paired with an external charge regulator such as the Mastervolt Alpha Pro, which guarantees a 3-stage smart charging cycle and rigorous thermal protection of the system.\u003c\/p\u003e","brand":"Mastervolt","offers":[{"title":"Default Title","offer_id":53723876458836,"sku":"46228150","price":1901.61,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0988\/3274\/4788\/files\/alternateur-alpha-compact-28150-sans-poulie_46228150-1.jpg?v=1776349492"},{"product_id":"mastervolt-alternateur-alpha-compact-28-150-volvo-penta-24v","title":"Alpha Compact 28\/150 Volvo Penta alternator","description":"\u003ch3\u003eOverview of the Alpha Compact 28\/150 alternator for Volvo Penta\u003c\/h3\u003e\n\u003cp\u003e\n    The Mastervolt Alpha Compact 28\/150 alternator (part number 46228152) is designed for continuous power generation in marine and industrial environments. This 24 VDC model is specifically sized for direct mounting on Volvo Penta engines in the D4 to D13 series. It can be used as a primary replacement alternator or as a secondary power take-off (PTO) alternator dedicated to charging a service battery bank. This unit is supplied without the Alpha Pro III charge regulator, which is a mandatory component for managing output voltage and current.\n\u003c\/p\u003e\n\n\u003ch3\u003eTechnical performance and raw data\u003c\/h3\u003e\n\u003cp\u003e\n    The alternator delivers a nominal charge current of 150 A at 6,000 rpm (at 25 °C). Its excitation speed is set at 1,700 rpm, allowing it to provide a current of 28 to 30 A at an alternator rotation speed of 1,800 rpm (corresponding to engine idle speed). The maximum tolerated rotation speed is 16,000 rpm. The absorbed mechanical power (PTO) is 8.4 kW (11.4 hp), with a mechanical-to-electrical conversion efficiency of approximately 50 %. The maximum operating temperature reaches 120 °C, monitored by an integrated temperature probe with an RJ12 connection.\n\u003c\/p\u003e\n\n\u003ch3\u003eMechanical design and integration\u003c\/h3\u003e\n\u003cp\u003e\n    The Alpha Compact 28\/150 weighs 7.9 kg. Its internal architecture reduces weight by 40 % and volume by 25 % compared to conventional alternators of the same capacity. Cooling is provided by two internal fans, requiring installation with a clockwise rotation direction (viewed from the pulley side). This specific model includes a multi-groove belt pulley suitable for Volvo Penta blocks as standard and is mounted via a pivoting arm. The unit is non-insulated (the negative output is connected to the metal housing). For installations requiring galvanic isolation, an optional insulating bushing kit (part number 48420240) is available, changing the mounting hole diameter from M10 to M8 or from M12 to M10. Electrical connections are made via two M8 studs for the positive output, an insulated fast-on connector for the W signal (tachometer), and a proprietary Mastervolt connector for the excitation current.\n\u003c\/p\u003e\n\n\u003ch3\u003ePositioning in the Mastervolt range and comparison\u003c\/h3\u003e\n\u003cp\u003e\n    Within the Navico Group offering, the Alpha Compact series stands out from standard Alpha alternators (such as the Alpha 24\/110 or Alpha 24\/150 IV models) due to its compact format, the use of unidirectional internal fans instead of an external bidirectional fan, and a non-insulated base design. Unlike universal Alpha Compact versions, which are supplied without a pulley, this VP variant is ready for use with Volvo Penta engines. Combined with the Alpha Pro III regulator (sold separately), this system differs from original equipment alternators by applying a 3-stage charging algorithm compatible with lead-acid and lithium-ion battery banks, while offering full integration with the MasterBus communication protocol.","brand":"Mastervolt","offers":[{"title":"Default Title","offer_id":53723876655444,"sku":"46228152","price":1875.13,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0988\/3274\/4788\/files\/main-square_0e514e82-3d7a-4d9c-83d3-24612f7e21fe.jpg?v=1778053068"},{"product_id":"mastervolt-capteur-temperature-alternateur-cable-2m","title":"Alternator temperature sensor 2 m cable","description":"\u003cp\u003e\n    The \u003cstrong\u003eMastervolt alternator temperature sensor\u003c\/strong\u003e, part number 41500400, is an essential component for monitoring and protecting your marine charging system. Designed specifically to be used in conjunction with Mastervolt’s Alpha Pro charge regulator, it ensures optimal thermal management of your alternator, regardless of brand.\n\u003c\/p\u003e\n\n\u003ch3\u003eAdvanced protection against overheating\u003c\/h3\u003e\n\u003cp\u003e\n    This temperature sensor plays a critical role in preventing alternator overheating risks. When the Alpha Pro is paired with alternators from manufacturers other than Mastervolt, this sensor provides an additional layer of safety. It transmits real-time temperature data to the Alpha Pro regulator, enabling the latter to adjust the charging process to avoid thermal damage and extend equipment lifespan. This feature is particularly relevant for installations where thermal management is not natively integrated or sufficient on third-party alternators.\n\u003c\/p\u003e\n\n\u003ch3\u003eIntegration and technical specifications\u003c\/h3\u003e\n\u003cp\u003e\n    With its 2-meter cable, the \u003cstrong\u003eMastervolt alternator temperature sensor\u003c\/strong\u003e offers installation flexibility to adapt to various engine compartment configurations. While its primary function is to protect the alternator, it also contributes to optimizing charging efficiency by allowing the Alpha Pro regulator to operate under ideal thermal conditions. Compared to a complete absence of temperature monitoring, this sensor significantly enhances the reliability of your boat’s electrical power system. It represents a minimal investment for maximum protection of costlier components such as the alternator and batteries.\n\u003c\/p\u003e","brand":"Mastervolt","offers":[{"title":"Default Title","offer_id":53723881046356,"sku":"41500400","price":22.35,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0988\/3274\/4788\/files\/main_4b687625-1b43-45df-bb5e-4dfd3790859e.jpg?v=1778020085"},{"product_id":"mastervolt-poulie-multi-gorges-6-alternateur-alpha","title":"Multi-groove pulley (6) for Alpha 24\/110 and Alpha 24\/150","description":"\u003cp\u003e\n    The \u003cstrong\u003eMastervolt 6-groove multi-groove pulley (6)\u003c\/strong\u003e is an essential replacement component designed specifically to maintain optimal performance of Alpha series marine alternators. This pulley, featuring six grooves, ensures reliable and efficient power transmission between the engine and the alternator, thereby contributing to stable onboard power generation.\n\u003c\/p\u003e\n\u003ch3\u003eCompatibility and Integration\u003c\/h3\u003e\n\u003cp\u003e\n    Designed as a direct replacement part, this pulley is compatible with several Mastervolt Alpha alternator models, including versions \u003cstrong\u003eAlpha 12\/130\u003c\/strong\u003e, \u003cstrong\u003eAlpha 24\/75\u003c\/strong\u003e, \u003cstrong\u003eAlpha 24\/110\u003c\/strong\u003e, and \u003cstrong\u003eAlpha 24\/150\u003c\/strong\u003e. Unlike complete alternators such as the Mastervolt Alpha Pro models or competing ranges from Balmar or Victron Energy, this pulley serves as a preventive or corrective maintenance component, essential for extending the lifespan of your existing equipment. It ensures precise adaptation and performance compliant with the manufacturer's original specifications.\n\u003c\/p\u003e\n\u003ch3\u003eTechnical Importance\u003c\/h3\u003e\n\u003cp\u003e\n    Using an \u003cstrong\u003eoriginal Mastervolt\u003c\/strong\u003e pulley is crucial to avoid misalignments, premature belt wear, and efficiency losses. A worn or damaged pulley can lead to inefficient battery charging and potential failures in the electrical system. This component is therefore vital for the reliability of your marine electrical installation, ensuring that your Alpha alternator continues to operate at full capacity under the demanding conditions of the marine environment.\n\u003c\/p\u003e","brand":"Mastervolt","offers":[{"title":"Default Title","offer_id":53723888845140,"sku":"48400030","price":26.19,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0988\/3274\/4788\/files\/main-square_de2f28ac-18c7-40c1-8dfd-70c379f00a01.jpg?v=1778021497"},{"product_id":"mastervolt-poulie-multi-gorges-8-48-1mm-electricite-marine","title":"Multi-groove pulley (8) Ø 48.1 mm","description":"\u003cp\u003e\n    The \u003cstrong\u003eMastervolt 8-groove pulley (Ø 48.1mm)\u003c\/strong\u003e is a critical mechanical component designed for power generation systems aboard vessels. Manufactured by Mastervolt, a recognized leader in marine electrical solutions, this pulley is specifically engineered to ensure reliable and efficient power transmission.\n\u003c\/p\u003e\n\u003ch3\u003eDesign and Technical Specifications\u003c\/h3\u003e\n\u003cp\u003e\n    This pulley features an \u003cstrong\u003e8-groove configuration\u003c\/strong\u003e, optimized for stable belt drive operation and minimal slippage, which is crucial for alternators and other rotating equipment. With a \u003cstrong\u003ediameter of 48.1 mm\u003c\/strong\u003e and a \u003cstrong\u003ewidth of 39.4 mm\u003c\/strong\u003e, it is sized for precise integration into Mastervolt charging systems. Its robust design ensures excellent durability and resistance to common mechanical stresses in marine environments.\n\u003c\/p\u003e\n\u003ch3\u003ePosition in the Mastervolt Range\u003c\/h3\u003e\n\u003cp\u003e\n    As a spare part, this pulley is part of Mastervolt’s energy solutions ecosystem, ensuring compatibility and optimal performance with the brand’s alternators and energy management systems. Unlike more complex units such as Alpha alternators or Mass Combi chargers, this pulley is a fundamental component of the drivetrain, providing the essential mechanical link. Its role is comparable to that of an alternator pulley in competitors like Balmar or Victron Energy, but it is specifically tailored to the high-performance and reliability requirements of Mastervolt equipment. It is not an obsolete product but a maintenance or replacement component for existing systems or new installations.","brand":"Mastervolt","offers":[{"title":"Default Title","offer_id":53723888910676,"sku":"48420170","price":58.32,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0988\/3274\/4788\/files\/main-square_a8ab84ba-7d18-49dd-bfd0-19db0bdd3a8f.jpg?v=1778021525"},{"product_id":"mastervolt-poulie-multi-gorges-8-diametre-56mm-alternateur","title":"Multi-groove pulley (8) Ø 56 mm","description":"\u003cp\u003e\n    The Mastervolt \u003cstrong\u003e8-groove multi-groove pulley (8) Ø56mm\u003c\/strong\u003e, part number 48420140, is a precision mechanical component designed for marine power generation systems. This pulley is specifically sized with a 56 mm diameter and a 38.9 mm width, featuring eight grooves for optimal and stable power transmission. It aligns with Mastervolt’s philosophy of ensuring energy independence aboard vessels.\n\u003c\/p\u003e\n\u003ch3\u003eDesign and Performance\u003c\/h3\u003e\n\u003cp\u003e\n    Manufactured in Germany, this Mastervolt pulley is a critical spare part for the brand’s alternators. Its multi-groove design ensures better grip and uniform load distribution, reducing belt wear and extending the lifespan of the entire drive system. Compared to simpler pulley designs or those with fewer grooves, this configuration delivers increased efficiency and superior reliability in demanding marine environments. While Mastervolt offers an extensive range of electrical equipment, this pulley serves as a specific replacement part, ensuring compatibility and original performance for existing Mastervolt installations.\n\u003c\/p\u003e\n\u003ch3\u003eIntegration and Reliability\u003c\/h3\u003e\n\u003cp\u003e\n    Integrating this pulley into an existing Mastervolt system is straightforward, as it is designed as an exact replacement part. Mastervolt is recognized for the robustness and reliability of its equipment, and this pulley is no exception. It is essential for maintaining the performance of Mastervolt alternators and generators, preventing failures caused by wear in transmission components. Unlike generic brands, using original Mastervolt parts ensures that technical specifications and manufacturing tolerances are met, which is critical for the longevity and safety of marine electrical installations. This product is offered without additional accessories, focusing solely on providing the replacement part itself.\n\u003c\/p\u003e","brand":"Mastervolt","offers":[{"title":"Default Title","offer_id":53723889074516,"sku":"48420140","price":214.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0988\/3274\/4788\/files\/main-square_44be13cf-6101-4d9c-b195-9448917b20f7.jpg?v=1778021512"},{"product_id":"mastervolt-regulateur-charge-alpha-pro-iii-electricite","title":"Alpha Pro III Charge Controller","description":"\u003cp\u003e\n    The \u003cstrong\u003eAlpha Pro III charge regulator\u003c\/strong\u003e from Mastervolt (reference 45513000) is a sophisticated charge management solution designed to optimize the performance of standard and high-performance alternators in marine and vehicle systems. Based on ten years of experience and evolution, this regulator provides fast and safe charging of service batteries from the propulsion engine while protecting the entire system. It features a modernized style, increased power, and improved ease of use compared to previous Alpha Pro generations.\n\u003c\/p\u003e\n\n\u003ch3\u003eCharge performance optimization and system protection\u003c\/h3\u003e\n\u003cp\u003e\n    The Alpha Pro III converts any alternator into an advanced 3-stage charger (Bulk, Absorption, Float) with thermal control, compatible with lead-acid (flooded, gel, AGM) and lithium-ion batteries. Unlike standard alternator regulators, which are often undersized for charging service batteries, the Alpha Pro III ensures optimal charging, preventing overheating and overcharging to extend battery life. It can handle induced currents up to 20 A, allowing it to control high-power alternators, including models from 200 A to 400 A, and even up to 600 A for certain tested Delstar alternators.\n\u003c\/p\u003e\n\n\u003ch3\u003eAdvanced features and MasterBus integration\u003c\/h3\u003e\n\u003cp\u003e\n    This advanced regulator continuously measures battery temperature and voltage for temperature-compensated charging, with an adjustment of -30 mV\/°C (-17 mV\/°F) and voltage drop compensation up to 3 V in DC cables. The absorption time is adjustable from 2 minutes to 12 hours, with a default setting of 4 hours. An intelligent \"keep alive\" function ensures reliable tachometer readings by sending engine RPM values over the MasterBus network, alongside alternator status and charge level. The Alpha Pro III is compatible with 12 V and 24 V systems and fully integrates with Mastervolt’s MasterBus, simplifying wiring and optimizing cooperation with other Mastervolt equipment. It comes with 6-meter battery temperature sensors and dedicated connections for Mastervolt and Bosch alternators (via adapter 45510500). Its compact dimensions (90 x 109 x 30 mm) and 0.4 kg weight, combined with fanless cooling, make installation in demanding marine environments straightforward.","brand":"Mastervolt","offers":[{"title":"Default Title","offer_id":53723889500500,"sku":"45513000","price":331.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0988\/3274\/4788\/files\/main-square_a7fe6e8f-62d7-4643-85f9-51bce6ba5517.jpg?v=1778021342"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0988\/3274\/4788\/collections\/e67aad84d0fce1d2003cfed6502093d6.png?v=1779974970","url":"https:\/\/skysat.fr\/en-us\/collections\/alternators.oembed","provider":"Skysat","version":"1.0","type":"link"}