The MultiPlus-II is a multi-functional inverter/charger with all the features of the MultiPlus, and an optional external current probe that expands the PowerControl and PowerAssist function to 50A and 100A respectively. The MultiPlus-II is ideal for professional marine installations, with sailboats, vehicles and land-based off-grid systems.
It is also equipped with an anti-islanding system and has a long and growing list of certifications for many countries regarding the ESS application. Several system configurations are possible. For more information, see the ESS System Design and Installation manual.
It is possible to set a maximum current for the generator or the network. The MultiPlus-II then takes into account the other AC loads and it will only use the excess for the load, thus avoiding any overload of the mains supply or the generator (PowerControl function). The PowerAssist function gives an extra dimension to the principle of PowerControl If a high peak power demand is often required for a short time, the MultiPlus-II will compensate for the lack of power from the generator, the shore or the mains by the energy coming from battery. And when demand drops, the excess power will be used to recharge the batteries.
The MultiPlus-II can be used both off-grid and connected to a PV grid or other alternative energy systems. It is compatible with both solar charge controllers and grid-tied inverters
The main output has an uninterrupted power supply function. In the event of a grid failure or disconnection of shore or generator power, the MultiPlus-II takes over supplying the connected loads. This transfer is so fast (less than 20 milliseconds) that the operation of connected computers or other sensitive electronic equipment will not be disturbed. The second output is energized only when AC power is available at the MultiPlus-II input. Loads that would not discharge the battery, such as a water heater for example, can be connected to this output
Up to 6 Multis can be operated in parallel for more power output. For example, six 48/5000/70 units will provide 25 kW / 30 kVA output power and 420 Amps of load capacity. In addition to parallel connection, three units of the same model can be configured for three-phase output. But that's not all: up to 6 series of 3 units can be connected in parallel for a 75 kW / 90 kVA converter and more than 1200 A load capacity
Settings can be changed in minutes using VEConfigure software (desktop or laptop computer and MK3-USB interface required). Several control and supervision options are available: Color Control GX, Venus GX, Octo GX, CANvu GX, desktop or laptop computer, Bluetooth (with an optional VE.Bus Smart dongle), Battery monitor, Control panel Digital Multi Control.