Mastervolt ChargeMaster 12/50-3 Battery Charger - 44010500

SKU: EX 44010500

1-2 weeks delivery time

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The Mastervolt ChargeMaster 12/50-3 (44010500) is a three-output, 12 V battery charger capable of delivering a total of 50 A. Designed for global use with auto-ranging input (90–265 V AC), it supports all battery chemistries, including Lithium Ion, and provides robust charging via Mastervolt’s 3-Step+ algorithm. Built with galvanic isolation, ignition protection, and MasterBus integration, it is ideal for professional marine, vehicle, or off-grid energy systems up to 500 Ah. Note: this model is discontinued and replaced by the ChargeMaster Plus 12/50-3.

Description
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Mastervolt 44010500 – ChargeMaster 12 V/50 A Battery Charger (3 Outputs, Auto-Ranging, MasterBus, Ignition Protected)

The ChargeMaster 12/50-3 is a rugged and intelligent battery charger designed for professional and recreational DC systems. With a total output of 50 A at 12 V DC, the unit supports simultaneous charging of up to three battery banks. Auto-ranging AC input allows global operation, and MasterBus compatibility provides centralized monitoring and configuration. Built-in protection, robust fan cooling, and 3-Step+ charging make it ideal for marine, RV, and industrial environments up to 500 Ah.

Key Features

Delivers 50 A total charge current at 12 V DC
Supports three independent battery outputs
Auto-ranging input: 90–265 V AC, 50/60 Hz
3-Step+ charging profile ensures fast and complete charging
Compatible with AGM, Gel, Wet, and Lithium Ion batteries
MasterBus enabled for full remote system integration
Power supply mode provides DC power without battery
Ignition protected (SAE J1171/ISO 8846)
Galvanically isolated for enhanced safety
Vario-controlled fan for quiet and efficient cooling

General Specifications

Specification	Value
Product Code	44010500
Nominal Output Voltage	12 V DC
Total Charge Current	50 A
Battery Bank Capacity Range	100–500 Ah
Number of Outputs	3 (1x full + 2x 10 A typical)
AC Input Range	90–265 V AC, 50/60 Hz
Power Consumption (full load @ 230 V)	825 W
Galvanic Isolation	Yes
MasterBus Compatible	Yes
Display	LED panel
Mounting	Bracket or 4x screw
Dimensions (HxWxD)	291 × 210 × 131 mm
Weight	4 kg (8.8 lb)
Protection Degree	IP23
Certifications	CE, ABYC A-31, SAE J1171, ISO 8846, RMRS, RRR

Charging Profile & Safety

Function	Specification
Charge Algorithm	IUoUo 3-Step+ (auto for battery type)
Bulk Voltage	14.4 V
Absorption Voltage	14.25 V (4 hours)
Float Voltage (Wet)	13.25 V
Float Voltage (AGM/Gel)	13.8 V
Temp Compensation	Yes
DC Voltage Compensation	Automatic
Standby Power Draw	< 5 mA
Operating Temperature	–25 °C to +60 °C (derating outside 0–40 °C)
Power Factor	≥ 0.98
Protections	Overload, Overtemp, Short Circuit, Battery Voltage Limits

Applications

Marine DC systems (house, engine, bow thruster)
RVs, expedition vehicles, or mobile service trucks
Off-grid or backup battery charging systems
Professional telecom or instrumentation systems

Note

This model has been discontinued. The recommended replacement is the ChargeMaster Plus 12/50-3, which offers enhanced digital connectivity, built-in battery profiles, and improved thermal efficiency.