Meet the Mastervolt CombiMaster 12/2000 Inverter/Charger — a compact, lightweight powerhouse built to deliver reliable, hum-free power from your batteries. Designed to handle the heaviest and most sensitive loads with ease, it automatically switches between shore/generator power and inverter output, so you never experience a power dip. With intelligent charging, automatic transfer, and advanced monitoring, the CombiMaster keeps your systems safe, efficient, and always ready.
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True sine wave output at 120 V (60/50 Hz configurable) for clean, stable power to electronics, appliances, and tools.
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2000 W continuous power with 3000 W peak (surge 4000 W) to start demanding loads and run on overdrive when needed.
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Automatic AC transfer switches seamlessly between mains/generator and inverter output in about 10 ms, ensuring constant power.
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Power Assist feature prevents tripping of mains fuses when connected to a weak land line or small generator.
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Intelligent 3-step+ battery charger for faster, safer charging across flooded, Gel/AGM, and MLI batteries.
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Generator compatible and fully integrable with MasterBus, CZone, and NMEA 2000 for broad monitoring and system control.
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Automatic battery voltage sensing with temperature compensation for optimal charging in varied conditions.
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Compact, lightweight design with heavy-duty connections for quick installation and reliable operation.
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High protection and reliability including IP23 enclosure, conformal coating for humidity, and a broad safety/compliance profile (ABYC A31, UL1236, UL1741, SAEJ1171, FCC class B).
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Ideal for larger battery banks recommended 180–500 Ah (types may vary) with a 90–140 V input range and up to 100 A max charging current at 14.25 V.
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Integrated communication via MasterBus, CZone, and NMEA 2000 for seamless remote monitoring and control.
With its compact form factor, high efficiency (up to 93%), and user-centric design, the CombiMaster 12/2000 is the go-to inverter/charger for marine, RV, and mobile power systems. It delivers reliable power when you need it, while protecting your batteries and electrical system from faults, all in a single, easy-to-install unit.
| Specifications sine wave inverter |
| Nominal DC voltage |
12 V (10.2—16 V) |
| Output voltage |
120 V |
| Output frequency |
60/50 Hz (configurable) |
| Output waveform |
true sine |
| Continuous power at 40 °C / 104 °F, cos phi 1 |
2000 W |
| Peak power (30 sec) |
3000 W |
| Surge power (5 sec) |
4000 W |
| Max. efficiency |
93 % |
| Battery no-load power consumption |
30 W (on mode) / < 1 mA (off mode) |
| Energy saving mode consumption |
10 W |
| Synchronise with mains |
yes |
| Specifications battery charger |
| Input voltage range |
90—140 V |
| Max. input current |
17 A (adjustable) |
| Max. charge current at 40 °C / 104 °F |
100 A at 14.25 V (configurable) |
| Battery temperature sensor |
yes, included |
| Battery voltage sense |
automatic compensation |
| Specifications transfer system |
| AC input |
30 A (switched) |
| AC output |
47 A |
| AC input fuse |
yes |
| Transfer speed |
10 ms |
| Transfer voltage range |
wide: 70—140 V / narrow: 90—140V |
| Transfer frequency range |
40-65 Hz |
| General specifications |
| Galvanic isolation |
yes |
| Display/read-out |
LED display |
| Dimensions, hxwxd |
17.6 x 11.2 x 6.1 inch |
| Weight |
20.5 lb |
| Compliance |
ABYC A31, UL1236, UL1741, SAEJ1171, FCC class B |
| Technical specifications |
| Charge characteristic |
UoUo, automatic / 3-step+ for flooded, Gel/AGM and MLI, configurable |
| Recommended battery capacity |
180-500 Ah (based on gel batteries, may differ for other types) |
| Ground relay |
yes, configurable by means of mechanical jumper |
| Temperature range (ambient temp.) |
-13 °F to 140 °F |
| Cooling |
vario fan |
| Protection degree |
IP23 (vertical mounting) |
| Safety class |
IEC protection class I |
| Humidity protection |
conformal coating, max. 95 % relative humidity, non condensing |
| Protections |
over-temperature, overload, short circuit, high/low battery voltage |
| Power Assist |
yes, supports AC input with power from the battery |
| Power Sharing |
yes, allows you to select AC Input fuse setting |
| MasterBus compatible |
yes |
| CZone / NMEA 2000 compatible |
yes |
