Mastervolt Mass Combi 24/4000-100 120V Inverter/Charger - 37024005

SKU: EX 37024005

1-2 weeks delivery time

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The Mastervolt Mass Combi 24/4000-100 (item no. 37024005) is a professional-grade 24 V DC inverter/charger system for 120 V / 60 Hz installations. It offers 3750 W of continuous inverter output (7500 W peak) and delivers 120 A of adaptive 3-step+ battery charging. With dual 5 A auxiliary outputs, Power Assist support, and MasterBus compatibility, this unit suits demanding marine, vehicle, and industrial environments. Housed in a compact 496 x 318 x 279 mm casing and weighing 21 kg, it is engineered for high-reliability autonomous operation.

Description
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Mastervolt 37024005 - Mass Combi 24/4000-100 Inverter/Charger (120V, 3750W, 120A) – High Capacity, MasterBus Ready

The Mastervolt Mass Combi 24/4000-100 (product code: 37024005) is a high-capacity inverter/charger for 24 V DC autonomous energy systems in North American 120 V environments. Featuring a 3750 W true sine wave inverter and a 120 A intelligent battery charger, it supports dual battery banks, Power Assist, and fully isolated AC output channels. Ideal for marine and off-grid applications requiring maximum performance and control, it also integrates into MasterBus smart networks via an interface.

Key Features

True sine wave inverter: 3750 W continuous / 7500 W peak
Advanced 3-step+ battery charger: 120 A main, 2 × 5 A auxiliary
Power Assist technology protects against grid/generator overload
Dual AC outputs for separating critical and general loads
MasterBus ready (interface required for integration)
HF design: compact, lightweight, silent (no transformer hum)
Dimensions: 496 x 318 x 279 mm
Weight: 21 kg

Specifications – Inverter

Nominal DC Voltage	24 V (range 19–31 V)
Output Voltage	120 V ± 5%, 60 Hz ±0.05%
Output Waveform	True sine wave
Continuous Power	3750 W @ 25°C
Peak Load	7500 W
Efficiency	≥ 90%
Max Ripple on DC	< 5%
Energy Saving Mode	1 W
Parallel Configuration	No
3-Phase Capability	No
Sync with Grid/Generator	Yes

Specifications – Battery Charger

Input Voltage Range	90–135 V AC
Charge Current	120 A @ 28.5 V (adjustable)
Primary AC Consumption	3500 W / 29 A
Auxiliary Output	2 × 24 V / 5 A
No-load AC Draw	< 30 W
Battery Temperature Sensor	Included
Voltage Sensing	Automatic compensation
Charging Algorithm	IUoUo / 3-step+ for Gel, AGM, MLI, flooded, traction

Specifications – Transfer System

AC Input	50 A (25 A switched)
AC Output 1	25 A (short break)
AC Output 2	50 A (main)
Transfer Speed	~10 ms typical
Voltage Range	90–135 V
Frequency Range	45–65 Hz