Mastervolt Mass Combi Ultra Inverter/Charger (48V / 3500W / 50A)

The Mastervolt Mass Combi Ultra combines a 3 step battery charger, able to charge a second 12v or 24v battery simultaneously, along with a heavy duty true sine wave power inverter. The unit has two AC inputs and can be connected up to shore power and generators 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 is equipped with MasterBus Combi integration for easy operation along with the rest of your Mastervolt system.

The Mass Combi Ultra 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.

This unit can provide up to 50% of charging current or inverter capacity without using any fan cooling, and so runs very quietly. Even when operating at maximum capacity, or performing in high ambient temperatures, the fan speed is regulated to only run in a linear way, meaning it wont spin too fast or make unnecessary noises. This model can be used in a 3 phase system, or you can combine up to 10 units in parallel for higher power outputs.

Specifications sine wave inverter

Nominal DC voltage: 48 V (38-62 V)

Output voltage: 180-260 V, adjustable

Output frequency: 50/60 Hz (± 0.005 %), configurable

Output waveform: true sine

Continuous power at 40 °C / 104 °F, cos phi 1: 3500 W

Max. peak load: 7000 W

Max. efficiency: ≥ 93 %

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

No-load power consumption on DC (ON/inverter OFF/OFF): 26 W / 4 W / 0 W

Energy saving mode consumption: 7 W

Parallel configuration: yes, up to 10 units (for larger systems, an external transfer system is required)

3-Phase configuration: yes, up to 3x3

Synchronise with mains/generator: yes

Specifications battery charger

Input voltage range: 184-275 V

Max. input current: 16 A

Max. charge current at 40 °C / 104 °F: 50 A at 57 V, adjustable

Secondary charger output voltage: 12/24 V selectable

Secondary charger output current: 10 A

Battery temperature sensor: yes, included

Battery voltage sense: through MasterShunt, otherwise automatic compensation

Specifications transfer system

AC input (generator): 50 A (switched)

AC input: 30 A (switched)

AC output 1: 67 A

AC output 2: 50 A (switched)

AC input fuse: no

Transfer speed: seamless (< 1 ms)

Transfer voltage range: 184-275 V, adjustable

Transfer frequency range: 35-68 Hz, adjustable

General specifications

Galvanic isolation: yes

Display/read-out: LED display

Dimensions, hxwxd: 472 x 318 x 178mm (18.6 x 12.5 x 7.0 inch)

Weight: 15.3 kg (33.7 lb)

Compliance: CE, E-mark, ABYC, RMRS

Technical specifications

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

Recommended battery capacity: ~ 100-300 Ah (based on gel batteries, may differ for other types)

Ground relay: yes, configurable

Temperature range (ambient temp.): -25 °C to 60 °C, derating > 40 °C (-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

MasterBus compatible: yes