The Mastervolt CombiMaster 12/3000 Inverter/Charger is a compact, reliable power solution for 12 V systems on boats or remote installations, delivering true sine-wave 120 V AC for sensitive electronics with smooth, hum-free performance.
-
True sine-wave inverter: 12 V nominal input with 120 V output; configurable 60/50 Hz; safe operation for electronics and appliances.
-
High power and efficiency: 2600 W continuous at 40 °C (104 °F); 4500 W peak; 6000 W surge; up to 93% efficiency for economical operation.
-
Intelligent battery charging: 3-step+ charger supports flooded, Gel/AGM and MLI batteries; input 90–140 V; max input current 28 A (adjustable); max charge current 160 A at 14.25 V (configurable); battery temperature sensor included with automatic voltage compensation.
-
Automatic transfer and synchronization: Automatically switches between mains and inverter to maintain constant power; transfer speed 10 ms; transfer voltage ranges wide 70–140 V / narrow 90–140 V; transfer frequency 40–65 Hz; synchronize with mains: yes.
-
Power Assist and generator compatibility: Power Assist prevents nuisance tripping on weak landlines or small generators; generator compatible for seamless operation with external power sources.
-
Smart integration and monitoring: Integrated MasterBus, CZone and NMEA 2000 for broad monitoring and system integration; LED display; IP23 protection; conformal coating with humidity protection up to 95% RH non-condensing; galvanic isolation.
-
Robust build and safety: Heavy-duty connections and reliable protection features; E-mark certified for compliance and safety; temperature range from -13 °F to 140 °F; cooling via vario fan.
-
Physical specs and compatibility: Dimensions 17.6 x 11.2 x 6.1 in; Weight 20.5 lb; compatible with 12 V systems and 300–800 Ah battery banks (based on gel batteries; may differ for other chemistries).
The unit powers critical devices with a steady true sine-wave output, simplifies system integration with onboard networks, and optimizes charging for longer battery runtimes. Automatic transfer, Power Assist, and generator compatibility reduce downtime and fuss, while robust protections and certifications provide peace of mind in demanding marine and off-grid environments.
| 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 |
2600 W |
| Peak power (30 sec) |
4500 W |
| Surge power (5 sec) |
6000 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 |
28 A (adjustable) |
| Max. charge current at 40 °C / 104 °F |
160 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 |
55 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 |
300-800 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 |
