For a 3kVA unit With its PowerAssist feature, the MultiPlus-II can add up to 3 kVA (that is 3000 / 230 = 13 A) to the output
during periods of peak power requirement. Together with a maximum input current of 32 A, this means that the output can
supply up to 32 + 13 = 45
For a 5kVA unit, this is an additional 22A (5000/230), so the maximum output is 50+22=77A.
An earth leakage circuit breaker and a fuse or circuit breaker rated to support the expected load must be included in series with
the output, and the cable cross-section must be sized accordingly.
• AC-out-2
A second output is available that disconnects its load in the event of battery operation. On these terminals, equipment is
connected that may only operate if AC voltage is available on AC-in-1, e.g. an electric boiler or an air conditioner. The load on
AC-out-2 is disconnected immediately when the MultiPlus-II switches to battery operation. After AC power becomes available
on AC-in-1, the load on AC-out-2 will be reconnected with a delay of approximately 2 minutes. This allows a generator to
stabilise.
4.4. Connection to the VRM Portal
Connection of the product to VRM requires an internet connection. This can be made via wifi, or preferably a hardwired ethernet
cable to an internet connected router.
The VRM site id is located on a sticker inside the cable connections area of the device.
For more information to set up VRM, refer to the VRM Getting Started Manual.
4.5. Optional connections
A number of optional connections are possible.
For the location of the connction terminals, see the appendix.
4.5.1. Remote control
The product can be remotely controlled in two ways.
• With an external switch. Operates only if the switch on the MultiPlus-II is set to “on”.
• With a Digital Multi Control panel connected to one of the two RJ45 sockets Operates only if the switch on the MultiPlus-II is set
to “on”.
4.5.2. Programmable relay
The product is equipped with a programmable relay.
The relay can be programmed for all kinds of other applications however, for example as a starter relay for a generator.
4.5.3. Programmable analogue/digital input/output ports
The product is equipped with 2 analogue/digital input/output ports.
These ports can be used for several purposes. One application is communication with the BMS of a lithium-ion battery.
4.5.4. Voltage sense
To compensate for possible cable losses during charging, two sense wires can be connected with which the voltage directly on
the battery or on the positive and negative distribution points can be measured. Use wire with a cross-section of 0.75mm² (AWG
18).
During battery charging, the MultiPlus-II will compensate the voltage drop over the DC cables up to a maximum of 1 Volt (i.e. 1V
over the positive connection and 1V over the negative connection). If the voltage drop threatens to become larger than 1V, the
charging current is limited in such a way that the voltage drop remains limited to 1V.
4.5.5. Temperature sensor
For temperature-compensated charging, the temperature sensor (supplied with the MultiPlus-II) can be connected. The sensor is
isolated and must be fitted to the negative terminal of the battery.
MultiPlus-II inverter/charger off-grid Australia
Page 10 Installation
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