The MultiPlus is a combined inverter and charger in one package: a true sine wave inverter, adaptive battery charger, and high-speed AC transfer switch built into a single enclosure. This model carries a 50A AC-in transfer relay for on-grid or off-grid battery storage use.
PowerAssist prevents overload of a limited AC source. Battery charging is automatically reduced first to avoid an overload; if demand still peaks, the unit boosts the output of a generator or shore supply with power drawn from the battery.
Uninterrupted AC power (UPS function): if grid, shore or generator power is lost, the inverter takes over the connected loads in under 20 milliseconds, fast enough that computers and other electronics keep running without disruption.
Virtually unlimited power through parallel operation: up to 6 units can run in parallel for higher output, with three-phase or split-phase operation also possible.
Specification

Battery voltage: 48V nominal
Continuous power (25°C): 3,000 VA / 2,400 W
Continuous power (40°C): 2,200 W, (65°C): 1,700 W
Peak power: 6,000 W
Maximum efficiency: 95%
Maximum battery charge current: 35A, adaptive 4-stage charge algorithm
Charge voltages: absorption 57.6V, float 55.2V, storage 52.8V
AC transfer switch rating: 50A
DC input voltage range: 38-66V
AC output: 230V, 50Hz (50Hz or 60Hz selectable)
AC input voltage range: 187-265V, frequency range 45-65Hz
Zero load power: 25W (20W AES, 12W in Search Mode)
Communication port: VE.Bus
Number of AC outputs: 2, plus auxiliary output
Protections: output short-circuit, overload, high/low battery voltage, over temperature, AC voltage on inverter output, excessive DC ripple
Operating temperature: -40°C to 65°C, fan-assisted cooling
Protection category: IP20
Dimensions: 362 x 258 x 218 mm
Weight: 18 kg
Material: aluminium, blue (RAL 5012)
Compliance: EN-IEC 60335-1, EN-IEC 60335-2-29, EN-IEC 62109-1
Warranty: 5 years standard (extendable to 10 years); lead-acid batteries 2 years, lithium batteries 3 years

A 16A AC-in transfer relay version of this model is also available for lighter-duty installations.