Mastervolt ChargeMaster Plus 24/40-3 Battery Charger - 44320400

SKU: EX 44320400

1-2 weeks delivery time

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The Mastervolt ChargeMaster Plus 24/40-3 (44320400) is a high-efficiency 24 V smart battery charger with 40 A output, 3-step+ charging algorithm, Smart In-/Output functionality (DC-DC converter), and full MasterBus integration. With wide input tolerance (80–275 V AC), ignition protection, and CAN-based networking (CZone/NMEA/CANopen), it safely charges Lithium, AGM, or Gel batteries (160–400 Ah) in marine, mobile, or off-grid environments.

Description
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Mastervolt 44320400 – ChargeMaster Plus 24 V/40 A Battery Charger (Smart In/Out, VSR, 3 Outputs, MasterBus)

The ChargeMaster Plus 24/40-3 is a compact, smart multicharger engineered for demanding 24 V systems. With 3 outputs, built-in Smart Input/Output DC-DC conversion, and VSR (Voltage Sensitive Relay) logic, it ensures fast, safe, and adaptive charging. The versatile input range (80–275 V AC) and robust IP23 housing make it ideal for marine, mobile, and off-grid use cases where reliability and compatibility with modern battery chemistries are essential.

Key Features

All-in-one multicharger: 40 A main output, Smart In-/Output, VSR relay
Advanced 3-step+ charge algorithm: compatible with Lithium, AGM, Gel, and traction batteries
Smart Input: charges all outputs from one alternator or secondary source
Wide input tolerance: works from 80–275 V AC and 35–70 Hz
SafeCharge logic: optimizes battery lifespan by monitoring charge status
Revival Mode: safely reactivates deeply discharged batteries
MasterBus support: integrates with CZone®, NMEA, and CANopen systems
High-temperature operation: maintains 80 % charging power at 60 °C
Protection: over-temp, overload, high/low battery voltage, ignition safe

General Specifications

Specification	Value
Product Code	44320400
Nominal Output Voltage	24 V
Total Output Current	40 A at 28.8 V
Primary Output Current	40 A
Smart In-/Output Voltage	12 V or 24 V
Smart In-/Output Current	5–10 A at 12 V, 5–20 A at 24 V (adjustable)
Input Voltage Range	120/230 V (80–275 V), 50/60 Hz
AC Input Current (230 V / 120 V)	6.8 A / 13.5 A
Number of Battery Outputs	3 (max.)
Battery Bank Capacity	160–400 Ah
Display	LED status display
Mounting	Vertical (IP23 protected)
Dimensions (HxWxD)	384 × 250 × 127 mm
Weight	5.9 kg (13.0 lb)
AC Connection	Screw terminals (max. 6 mm²)
Certifications	CE, ABYC, UL1236, SAE J1171, ISO 8846, CEC/DOE, RCM

Technical Specifications

Parameter	Value
Charge Algorithm	IUoUo, 3-step+ for AGM/Gel/Lithium/traction/spiral
Temperature Compensation	-30 mV/°C (sensor included)
DC Voltage Compensation	via MasterShunt
DC Standby Consumption	< 2 mA (MasterBus off)
Power Factor	> 0.98
Cooling Method	Temperature-controlled vario fan
Operating Temperature Range	-25 °C to 80 °C (derating < 0 °C > 40 °C)
Protection	Over-temp, overload, ignition-safe, voltage protection
MasterBus Compatible	Yes
Alarm Interface	Yes (via Multipurpose Output – 77030500)