Meet the Mastervolt CombiMaster 24/2000-60, a compact, marine-grade inverter/charger designed for 24 V battery banks and 120 V shore power. It delivers reliable, clean power with seamless transfer and easy integration for monitoring and control on boats.
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True sine wave inverter: 2000 W continuous, 3000 W peak, 4000 W surge; 120 V output with configurable 60/50 Hz; input range 20.4–32 V.
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Broad battery charger: 3-step+ charging that adapts to flooded, Gel/AGM, and MLI batteries; AC input 90–140 V, up to 21 A input; up to 60 A charge current at 28.5 V (configurable); includes battery temperature sensor and automatic voltage compensation.
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Automatic transfer switching: Seamless transfer between mains and inverter in 10 ms; AC input up to 30 A; AC output up to 47 A; wide and narrow transfer voltage ranges for varied shore power.
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Power Assist and system integration: Prevents nuisance tripping on weak landlines or small generators; easy monitoring and integration via MasterBus, CZone, and NMEA 2000.
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Safety and installation: E-mark certified, IP23 protection, galvanic isolation, safety class I; heavy-duty connections and quick wiring for reliable, straightforward installation.
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Efficiency and energy management: Up to 93% maximum efficiency; low no-load consumption (30 W on, <1 mA off); energy-saving mode consumes 10 W when idle.
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Compact build and mounting: Dimensions 17.6 in (h) x 11.2 in (w) x 6.1 in (d); weight 20.5 lb; suitable for vertical mounting; vario cooling fan for temperature control.
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Battery range and environment: Recommended battery capacity 120–320 Ah (gel guidance; other chemistries may differ); operating temperature range -13 °F to 140 °F.
With the CombiMaster, you gain steady, clean power whether you’re connected to shore power or running on battery. The rapid 10 ms transfer safeguards sensitive electronics, while the true sine output ensures smooth operation for motors and devices. Its flexible charging, broad battery compatibility, and marine-grade design provide reliable power management on tough seas, all while integrating seamlessly with MasterBus, CZone, and NMEA 2000 for simple system monitoring and control.
| Specifications sine wave inverter |
| Nominal DC voltage |
24 V (20.4—32 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 |
21 A (adjustable) |
| Max. charge current at 40 °C / 104 °F |
60 A at 28.5 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 |
120-320 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 |
