The Mastervolt Mass Combi range combines a powerful 3 step battery charger able to charge two batteries simultaneously, along with a heavy duty true sine wave power inverter to provide AC output to operate household items. The unit can be connected up to shore power or solar panels for charging and the AC output will automatically switch between mains and inverter mode. It has two separate AC outputs, allowing critical equipment to be put on a different circuit to other appliances to protect them from heavy loads. The inverter/charger is built to be reliable and user friendly, and includes two control panels for remote monitoring and operation.

The Mass Combi features the Power Assist function, which prevents main fuses or breakers being tripped in the event of a weak power supply. It also eliminates power failures and dips to maintain reliable performance. The unit is equally capable at handling heavy loads and more sensitive loads, and with a true sine wave output will not cause harm or damage to your appliances. The high frequency technology used eliminates noise typically associated with power inverters, such as buzzing or humming.

Specifications sine wave inverter

Nominal DC voltage: 24 V (19-31 V)

Output voltage: 180-250 V (adjustable) 50/60 Hz (± 0.05 %)

Output waveform: true sine

Continuous power at 25 °C / 77 °F, cos phi 1: 2550 W

Max. peak load: 4000 W

Max. efficiency: ? 90 %

Max. ripple on DC (battery at full load): < 5 %

Energy saving mode consumption: 0.5 W

Parallel configuration: yes, up to 2 units

Synchronise with mains/generator: yes

DC consumption at 230 V: < 9 W

Specifications battery charger

Input voltage range: 180-265 V

Max. charge current at 25 °C / 77 °F: 60 A at 28.5 V, adjustable

Primary AC consumption (full charge): 8.5 A

Secondary charger output voltage: 24 V

Secondary charger output current: 5 A

No-load power consumption on AC: < 15 W

Battery temperature sensor: yes, included

Battery voltage sense: automatic compensation

Specifications transfer system

AC input 1: 50 A (25 A switched, to short break output)

AC output 1: 25 A (short break output)

AC output 2: 50 A (power output)

AC input fuse: yes, resettable

Transfer speed: semi-seamless (10 ms typical)

Transfer voltage range: 180-265 V

Transfer frequency range: 45-65 Hz

General specifications

Display/read-out: LED display

Dimensions, hxwxd: 496 x 318 x 156mm (19.5 x 12.5 x 6.1 inch)

Weight: 11 kg (24.3 lb)

Delivered with: ICC remote panel and APC remote panel

Compliance: CE, ABYC, E4, RMRS

Technical specifications

Charge characteristic: IUoUo, automatic / 3-step+ for Gel/AGM/MLI/ flooded/spiral/traction

Max. current power output: 50 A

Max. current short break / inverter output: 25 A

Recommended battery capacity: ~ 120-360 Ah (based on gel batteries, may differ for other types)

Ground relay: yes, configurable

Temperature range (ambient temp.): -25 °C to 60 °C, derating > 25 °C (-13 °F to 140 °F)

Cooling: maintenance-free vario fans

Protection degree: IP23 (vertical mounting)

Safety class: IEC protection class I

Humidity protection: conformal coating, max. 95 % relative humidity, non condensing

Protections: over temperature, over load, short circuit, high/low battery voltage

Power Assist: yes

MasterBus compatible: yes, in combination with a MasterBus Combi Interface (product code M77030475)