Mastervolt Mass Combi 12/2500-100 120V Inverter/Charger - 37012505

SKU: EX 37012505

1-2 weeks delivery time

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The Mastervolt Mass Combi 12/2500-100 (item no. 37012505) is a compact and powerful inverter/charger tailored for 120 V / 60 Hz applications. It delivers 2500 W of continuous inverter power (4000 W peak) and features a 100 A 3-step+ charger with dual battery bank support. With high-frequency technology, a silent and transformer-free design, and full MasterBus compatibility, it’s ideal for mobile, marine, and industrial systems in North American markets. Dimensions: 496 x 318 x 156 mm; weight: 11 kg.

Description
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Mastervolt 37012505 - Mass Combi 12/2500-100 Inverter/Charger (120V, 2500W, 100A) – Parallel Capable, MasterBus Ready

The Mastervolt Mass Combi 12/2500-100 (product code: 37012505) is a dual-function inverter/charger designed for 120 V / 60 Hz systems, combining a robust 2500 W pure sine wave inverter and a high-performance 100 A battery charger. Ideal for demanding autonomous energy applications, it features parallel operation capability, low-ripple charging, Power Assist, and support for two battery banks. Integration into a digital MasterBus system is possible using an optional interface module.

Key Features

True sine wave inverter: 2500 W continuous, 4000 W peak
3-step+ charger: 100 A + 5 A secondary output
Supports 120 V / 60 Hz AC systems (±5%)
Dual AC outputs: critical vs. non-critical loads
Parallel operation (up to 2 units)
Power Assist prevents overloading the grid or generator
High-frequency, transformer-free silent operation
MasterBus integration ready (interface required)
Compact and rugged: 496 x 318 x 156 mm, 11 kg

Specifications – Inverter

Nominal DC Voltage	12 V (range 10–15 V)
Output Voltage	120 V ± 5%, 60 Hz ±0.05%
Waveform	True sine wave
Continuous Power	2500 W @ 25°C
Peak Load	4000 W
Efficiency	≥ 90%
DC Ripple	< 5%
Power Save Mode	0.5 W
Parallel Capability	Yes, up to 2 units
3-Phase Support	No
Sync with Mains/Generator	Yes

Specifications – Battery Charger

Input Voltage Range	90–135 V AC
Max Input Current	14.5 A
Max Charge Current	100 A @ 14.25 V (adjustable)
Secondary Output	12 V / 5 A
AC Consumption (Full Load)	14.5 A / 1700 W
No-load Consumption	< 15 W
Battery Temp 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 Time	~10 ms typical
Voltage Range	90–135 V
Frequency Range	45–65 Hz