Alternateur Alpha Compact 28/150 Volvo Penta

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Mastervolt

46228152

Alternator Alpha Compact 28/150 Volvo Penta

The Mastervolt Alpha Compact 28/150 high-performance alternator (24 V / 150 A) delivers massive charging current from idle speed to quickly recharge service battery banks, including lithium-ion types. Designed as part of the manufacturer’s ultra-compact current range, this model is specifically sized for direct secondary alternator installation on Volvo Penta marine engines (D4 to D13 series) and requires integration with the external Alpha Pro III regulator for thermal and electrical management.

Included with the product: Alpha Compact 28/150 VP alternator with integrated 8-rib pulley (supplied without mounting bracket, insulating bushes, or Alpha Pro III charge regulator).

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2.250,16€

2.250,16€ ~~2.734,80€~~

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Free pickup point from €150 in France
Pickup at Skysat possible

Custom installation

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Installers near you

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Support service

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Technical specifications

Serija	Alpha Compact
Nazivna napetost	24.0
Nazivni tok	150.0
Moč	8.4
Maksimalna hitrost vrtenja	16000.0
Vklopna hitrost	1700
Tok v mirovanju	30.0
Način montaže	Saddle mount
Smer vrtenja	Schedule
Galvanska izolacija	Non-insulated
Tip kontrole vzbujanja	External
Podpora senzorja temperature v ohišju	Oui
Minimalni premer vlečnega kolesa	53.3
Maksimalni premer vlečnega kolesa	71.1
Minimalno razmerje škripca	2.25
Maksimalno razmerje vretenc	3.0
Vlečno kolo vključeno	Oui
Način hlajenja	Dual integrated fan
Število hlajilnih ventilatorjev	2.0
Maksimalna delovna temperatura	120.0
Temperatura zaustavitve polnjenja	120.0
Teža	7.9
Načrtovan za morsko okolje	Oui
Velikost izhodnega terminala (mm)	M8

Detailed description

Predstavitev alternatorja Alpha Compact 28/150 za Volvo Penta

Alternator Mastervolt Alpha Compact 28/150 (referenčna številka 46228152) je namenjen kontinuiranemu proizvodnji električne energije v morskih in industrijskih pogojih. Ta model 24 VDC je dimenzioniran za neposredno namestitev na motorje Volvo Penta serij D4 do D13. Uporablja se kot glavni alternator za zamenjavo ali kot sekundarni alternator (odvzem moči) za polnjenje baterijskega sistema za servisne potrebe. Naprava je dobavljena brez regulatorja Alpha Pro III, ki je nujen za upravljanje napetosti in izhodnega toka.

Tehnične zmogljivosti in surove podatki

Alternator zagotavlja nazivni polnilni tok 150 A pri 6.000 vrtljajih/min (pri 25 °C). Njegova vžigalna hitrost je nastavljena na 1.700 vrtljajov/min, kar mu omogoča zagotavljanje toka 28 do 30 A pri 1.800 vrtljajih/min (kar ustreza motornemu prostemu teku). Maksimalna dovoljena hitrost vrtenja je 16.000 vrtljajov/min. Vlečna moč (PTO) znaša 8,4 kW (11,4 KM), z mehanskim-to-električnim izkoristkom okoli 50 %. Maksimalna delovna temperatura dosega 120 °C, nadzorovana s temperaturno sondo z vgrajeno povezavo RJ12.

Mehanska zasnova in integracija

Alpha Compact 28/150 tehta 7,9 kg. Notranja arhitektura omogoča zmanjšanje teže za 40 % in zmanjšanje prostornine za 25 % v primerjavi s konvencionalnimi alternatorji z enako zmogljivostjo. Hlajenje zagotavljata dva notranja ventilatorja, kar zahteva namestitev z vrtljaji v smeri urinega kazalca (pogledano z strani kolesa). Ta specifična izvedba vključuje serijsko večslečno kolesce, prilagojeno blokom Volvo Penta, in se pritrdi preko vrtljivega ramena. Naprava ni izolirana (negativna izhod je povezan z kovinskim ohišjem). Za namestitve, ki zahtevajo galvansko izolacijo, je na voljo opcijski komplet izolacijskih tulcev (referenčna številka 48420240), ki spremeni premer montažnih lukenj iz M10 v M8 ali iz M12 v M10. Električne povezave potekajo preko dveh vijakov M8 za pozitivni izhod, enega izoliranega fast-on konektorja za signal W (števec vrtljajev) in lastniškega vtiča Mastervolt za vzbujalni tok.

Položaj v Mastervoltovi ponudbi in primerjava

V okviru ponudbe Navico Group se serija Alpha Compact razlikuje od klasičnih alternatorjev Alpha (npr. modelov Alpha 24/110 ali Alpha 24/150 IV) po zmanjšanem formatu, uporabi enosmernih notranjih ventilatorjev namesto zunanjega dvosmernega ventilatorja in neizolirani osnovni izvedbi. V nasprotju z univerzalnimi izvedbami Alpha Compact, ki so dobavljene brez kolesca, je ta različica VP pripravljena za uporabo na motorjih Volvo Penta. V kombinaciji z regulatorjem Alpha Pro III (prodajanim ločeno) se ta sistem razlikuje od originalnih alternatorjev z uporabo 3-stopenske polnilne algoritma, ki je združljiv s sistemom baterij iz svinčevih kislin in litij-ionskih baterij, hkrati pa omogoča popolno integracijo v protokol MasterBus.

Expert review

Pol CONIN

Odgovorni digitalni vodja

« High power and thermal endurance for 24V service battery banks »

The Alpha Compact 28/150 alternator for Volvo Penta is a high-performance power generation solution, specifically designed to integrate optimally with Volvo Penta D4 to D13 engines. With a nominal output of 150A at 24V (28V charge voltage), it meets the high energy demands of modern systems, particularly those equipped with Lithium-Ion battery banks. Its patented design, up to 40% lighter and 25% more compact than a standard alternator, is a major strategic advantage in engine rooms where space and weight are critical.

Regarding system integration, it is imperative to highlight that this alternator is designed to operate in tandem with the external Alpha Pro III regulator. The latter is not an option but an essential component that controls the alternator to deliver a multi-stage charge (3-stage+), optimizing battery lifespan and ensuring fast and secure charging. Field reliability is ensured by a robust design tailored for high-temperature environments, featuring a dual internal fan that requires clockwise rotation (viewed from the pulley side), a crucial technical detail during installation. The integrated temperature probe allows the regulator to adjust the charge to prevent overheating, thus securing the entire system.

From an installation perspective, the Volvo Penta model is supplied with a pre-installed multi-groove pulley, simplifying assembly. It is important to note that its standard design is non-isolated (grounded to the chassis). For installations requiring galvanic isolation to protect engine electronics or prevent corrosion, Mastervolt offers specific isolation sleeves (ref. 48420240). Ultimately, this alternator does not merely replace the original equipment; it represents a fundamental upgrade to the charging system, delivering superior energy output, especially at low RPM, and proven reliability essential for offshore cruising and professional applications.

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Alternator Alpha Compact 28/150 Volvo Penta

2.250,16€

2.250,16€ ~~2.734,80€~~

Frequently asked questions

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What is the output power of the Alpha Compact 28/150 alternator?

This alternator delivers a massive charging current of 150 A at 24 V, requiring 8.4 kW (11.4 HP) of mechanical power (PTO).

Is the charge regulator supplied with the alternator?

No, this alternator is supplied bare. Adding the external Alpha Pro III charge regulator is strictly required to control the field current and benefit from the three-stage smart charging.

Is this alternator compatible with lithium batteries?

Yes, the Alpha Compact series offers an excellent power-to-size ratio enabling ultra-fast charging of large service battery banks, including lithium, AGM, and gel technologies.

Can the Alpha Compact 28/150 alternator be installed on any marine engine?

This specific model (reference 46228152) is specially calibrated and designed to fit directly on Volvo Penta engine mounts.

What is the weight of this equipment?

The Alpha Compact 28/150 alternator weighs 7.9 kg.

At what engine RPM does the alternator start charging?

The alternator begins charging at low RPMs. The cut-in speed is 1700 RPM (alternator rotation speed).

What is the maximum supported rotation speed?

The Alpha Compact 28/150 alternator can tolerate a maximum rotation speed up to 16,000 RPM.

How is the alternator cooled in the engine compartment?

It is equipped with a dual integrated fan and features a patented magnetic design, allowing it to maintain optimal efficiency even in confined high-temperature environments.

What is the maximum operating temperature?

This model is designed for harsh environments and can withstand up to 120 °C in continuous use.

Is this alternator galvanically isolated?

No, this specific Alpha Compact alternator model is not galvanically isolated.

How to connect the power output (positive cables)?

The connectivity is designed for high power with a dual M8 positive output terminal. It is imperative to use cables with an appropriate cross-section to handle the 150 A.

How to retrieve the signal for the boat's tachometer?

The alternator has an isolated terminal dedicated to the W (RPM) signal to simplify the connection and reading of your tachometer.

Is a temperature sensor included?

Yes, a temperature sensor is directly integrated into the alternator. It communicates with the charge regulator via an RJ12 port.

How to configure the temperature sensor in the MasterAdjust software?

When configuring your system via MasterAdjust, go to the System section and set the Temperature sensor parameter to Dynamo (specific to Alpha Compact models).

Is an insulation kit required for installation?

If isolated mounting is required for your installation, you must use insulating bushings. The recommended insulation kit for the Alpha Compact 28/150 and 28/110 models is part number 48420242.

Can the alternator operate on a 12V battery bank?

No, this model is a 24V DC alternator. It is exclusively designed to charge battery banks operating at 24 volts.

How is the excitation current (field) managed?

The field current (induced) is controlled by the external Alpha Pro III regulator, which connects easily to the alternator via a dedicated Mastervolt plug.

What to do if the belt slips?

If the belt slips, it reduces load capacity and generates noise. Check pulley alignment and ensure the belt tension is correct. Using an automatic tensioner is highly recommended for these power levels.

Is the Alpha Compact alternator compatible with the MasterBus network?

The alternator itself is controlled by the Alpha Pro III charge regulator. It is this external regulator that is fully MasterBus-compatible, enabling monitoring and configuration of the charge on your marine network.

Why is my battery not charging properly with this alternator?

Several causes are possible: check that the Alpha Pro III regulator is properly connected and functional, inspect the condition and tension of the drive belt, and ensure the battery terminals are clean and tightly secured.