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Mastervolt

44020120

ChargeMaster 24/12-3

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Retail priceBenefit from the professional rate

£239.40 GBP

£239.40 GBP ~~£307.63 GBP~~

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In stock

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

Custom installation

Trust Skysat to install the equipment on board

Request a quote

Installers near you

thanks to our network of approved installers

Find an installer

Support service

Opt for additional installation assistance

Technical specifications

Capteur de température batterie inclus	Oui
IP rating	IP23
Wired input	AC cable 2 m
Wired network	MasterBus
Section de câble AC recommandée	1.5 mm²
Plage de tension d'entrée AC	90-265
Dimensions (W x H x D)	234 x 132 x 60
Capacité de batterie recommandée	25.0
Supported battery chemistries	Lead-acid, AGM, Spiral, Gel, Deep cycle, Lithium-ion Mastervolt (MLi)
Bulk/absorption charge voltage	28.8
Charge algorithm	3-step
Phases de charge	Bulk, Absorption, Float
Cooling method	Vario fan
Max efficiency	73.1
Tension de maintien (Float)	26.5
Courant d'entrée AC maximal	5.0
Max charge current (A)	12.0
Section minimale du câble DC	4.0
Mounting type	Vertical wall mount
Nominal voltage	24.0
Operating temperature range	-25 to 60
Tension de sortie	24.0
Facteur de puissance (Cos Phi)	0.98
Recommended fuse rating	15.0
Galvanic isolation	Oui
Input voltage range	90-265
Marine-ready	Oui
Nominal input voltage	230.0
Nominal output voltage	24.0
Overload protection	Oui
Remote on/off support	Oui
Short-circuit protection	Oui
Weight	1.8
Wired output	3 equal outputs, screw terminals

Detailed description

The MASTERVOLT ChargeMaster 24/12-3 is a fully automatic battery charger designed for reliability and performance in marine and mobile environments. Part of the ChargeMaster range, known for its robustness, this model is a versatile solution for 24V systems requiring efficient and safe charging of multiple battery banks.

Advanced and versatile charging technology

This charger integrates Mastervolt’s innovative 3-stage+ charging algorithm, ensuring fast and complete battery recharge, even for fully discharged batteries. It is compatible with a wide range of battery technologies, including flooded lead-acid, AGM, Spiral, Gel, deep-cycle, and Mastervolt lithium-ion batteries (MLi). The temperature compensation function automatically adjusts charging voltages, preventing overcharging or excessive gassing, which significantly extends battery life. Unlike basic chargers, the ChargeMaster 24/12-3 maintains a stable DC power supply even without a connected battery, allowing direct powering of equipment such as lighting or refrigeration.

Robust design and system integration

The ChargeMaster 24/12-3 features three equal outputs, each capable of delivering the full charging current, distributed according to the needs of connected battery banks. Its robust design includes solid metal connectors with cable glands, protected against corrosion and overheating. The device has automatic input voltage detection (90–265V AC, 50/60 Hz), ensuring optimal operation worldwide. With an IP23 protection rating, it is designed for indoor installation, protected against water splashes and solid objects larger than 12.5 mm. Weighing 1.8 kg and with compact dimensions (234 x 132 x 60 mm), it is easy to integrate on board. CE, ABYC A-31, SAE J1171/ISO 8846 (ignition protection), RRR, and RMRS certifications attest to its compliance with the strictest maritime and industrial standards. For more complex systems, the ChargeMaster 24/12-3 is fully compatible with the MasterBus network, enabling centralized control and monitoring via a remote control panel or CZone™ integration.

Documentation

Type	Nom
	EN - User Manual
	EN - Consignes de sécurité -
	EN - Technical Datasheet
	EN - Configuration instructions
	EN - User Manual
	EN - User Manual
	EN - User Manual
	FR - Directives de sécurité -
	EN - Consignes de sécurité -
	EN - User Manual

Expert opinion

Pol CONIN

Digital Manager

« MASTERVOLT ChargeMaster 24/12-3: Technical Analysis and System Integration »

The MASTERVOLT ChargeMaster 24/12-3 is a reliable and high-performance charging solution for marine installations and recreational vehicles. Its ability to operate across an extended AC voltage range (90-265V) is a major advantage for international voyages or connections to varied power sources. The 3-step+ charging algorithm is critical for preserving battery longevity, particularly with temperature compensation that optimizes charge cycles. The MasterBus integration provides scalability and centralized energy management, enabling precise control and monitoring of battery status—key aspects for the reliability of an onboard system. The three independent outputs and the option to power DC loads directly without a connected battery enhance installation flexibility. Its IP23 rating makes it suitable for installation in protected environments, while its overall robustness, compliant with Mastervolt standards, ensures a long-lasting choice for demanding electrical systems.

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ChargeMaster 24/12-3

£239.40 GBP

£239.40 GBP ~~£307.63 GBP~~

Frequently Asked Questions

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What is the Mastervolt ChargeMaster 24/12-3 and what is it used for?

The Mastervolt ChargeMaster 24/12-3 is a fully automatic battery charger designed for marine and mobile environments. It is intended to efficiently and safely recharge 24V battery banks using an advanced 3-stage+ charging algorithm.

What are the dimensions and weight of the ChargeMaster 24/12-3?

The ChargeMaster 24/12-3 has dimensions of 234 x 132 x 60 mm (HxWxD). Its weight is 1.8 kg.

Can the ChargeMaster 24/12-3 power devices without a connected battery?

Yes, even when batteries are not connected, the ChargeMaster 24/12-3 can provide a constant DC output, allowing you to power equipment such as lighting or a refrigerator directly.

How does Mastervolt's 3-stage+ charging algorithm work?

The 3-step+ charging algorithm operates in three automatic phases:

BULK: The charger delivers its maximum current for a rapid charge from 0 to 80% of the battery’s capacity. ABSORPTION: The charger reaches its maximum charging voltage, and the charging current slowly decreases until the battery is fully charged to 100%. FLOAT: This stage begins once the battery is fully charged. The battery remains in a fully charged state, compensating for self-discharge.

What is the Ingress Protection (IP) rating of the ChargeMaster 24/12-3?

The ChargeMaster 24/12-3 has an IP23 protection rating. This means it is protected against solid objects larger than 12.5 mm and against rain falling at an angle up to 60° from the vertical.

Does the ChargeMaster 24/12-3 have an on/off switch?

No, the ChargeMaster 24/12-3 does not have an on/off switch. To shut it down, you must cut the AC power. Charging will resume as soon as AC power is restored.

What information does the LED screen of the ChargeMaster 24/12-3 display?

The ChargeMaster 24/12-3’s LED screen displays key data such as charging current, charging voltage, charge stage, and battery level (or available capacity percentage in Ah). It also shows the MasterBus network communication status.

Which battery types is the ChargeMaster 24/12-3 compatible with?

The ChargeMaster 24/12-3 is compatible with a wide range of battery technologies, including lead-acid batteries (flooded), AGM, Spiral, Gel, deep-cycle batteries, and Mastervolt lithium-ion batteries (MLi).

Can the ChargeMaster 24/12-3 be integrated into a MasterBus system?

Yes, the ChargeMaster 24/12-3 is compatible with the MasterBus network. This enables decentralized communication between different Mastervolt devices, as well as remote control and monitoring.

What is the minimum recommended battery capacity for the ChargeMaster 24/12-3?

For Mastervolt gel batteries (MVG series), the minimum recommended capacity for the ChargeMaster 24/12-3 is 25 Ah. Always follow the battery manufacturer's instructions.

Where and how should I install the ChargeMaster 24/12-3?

The ChargeMaster 24/12-3 is designed for indoor use only. It should preferably be mounted on a vertical wall, with the connection cables facing downward. Ensure at least 10 cm of free space around the device for proper airflow and avoid placing it in the same compartment as batteries or directly above them due to corrosive fumes.

What are the DC wiring requirements for the ChargeMaster 24/12-3?

For maximum system efficiency, DC cables must be as short as possible. The minimum recommended cross-section for battery cables up to 3 meters (9 feet) in length is 4 mm² (10 AWG) for each of the three outputs. Use ring terminals on the battery side and cable ends on the charger side, crimped with an appropriate tool.

Which DC fuses are recommended for the ChargeMaster 24/12-3?

The recommended DC fuses for each of the three outputs of the ChargeMaster 24/12-3 are 15A. The battery's positive cable must be fitted with a fuse and connected to the positive terminal of the battery bank.

Is it necessary to install a residual current device (RCD) with the ChargeMaster 24/12-3?

Yes, for a secure installation, it is necessary to insert a residual current device (RCD) in the ChargeMaster 24/12-3's AC input circuit. The ground wire provides protection only if the ChargeMaster's housing is connected to the safety ground.

Which items are included with the ChargeMaster 24/12-3 at purchase?

In addition to the ChargeMaster itself, delivery typically includes:

A battery temperature sensor with cable and plug.The DC wiring: 2 positive cables (red) and 1 negative cable (black).A MasterBus termination device.The user manual.Important safety instructions.

What important safety precautions should I take when installing the ChargeMaster?

Installation must be carried out by a certified electrician. All electrical systems (AC and DC) must be disconnected from any power source during installation. It is crucial to avoid short circuits or reverse polarity, as this can seriously damage the batteries, the ChargeMaster, the wiring, and accessories.

Under what conditions can the warranty of the ChargeMaster 24/12-3 be voided?

The warranty of the ChargeMaster 24/12-3 may be voided if work is carried out that does not comply with the guidelines, instructions, and specifications contained in the user manual. Mastervolt guarantees that the unit was built according to applicable standards, but any deviation from the instructions may result in damage or failure to meet specifications, thereby voiding the warranty.

Does the ChargeMaster 24/12-3 adjust charging voltage based on battery temperature?

Yes, the ChargeMaster 24/12-3 features temperature compensation. By installing the included battery temperature sensor, charging voltages are automatically adjusted to ambient temperatures. This prevents overcharging or excessive gassing, extending battery life.