Multiplus II GX.
No battery connected. Cause trip of B16 MCB some seconds after switching on.
L-N “polarity” OK.
I don’t have a battery a home, just wanted to update firmware and get access for the settings.
Theoretically some capacitor charging can cause this inrush or there is something else?
I re-read the manual, no word, that energization without battery is prohibited.
Its a battery based system, so you either have to connect a battery or a big enough DC powersupply
You can not run on only ac
Its designed to run from battery like an normal inverter, it needs to start from dc, needs ro be configured and then its ready to connect to ac
If its a 12/24v multiplus, you can use that at the right voltage setting, not on a 48v multiplus
Inrush will be higher then 5A, but you can try, or either build a pre charge circuit
There is a large capacitor bank on the DC input. You connect the ac, the unit checks the ac, decides it meets the required voltage and frequency, closes the input relays and then your ac goes high trying to charge these capacitors.
Although not specifically prohibited in the manual, the wiring order is Battery firs, then AC.
However, there is screen print on the front cover of the inverter specifically saying to connect the battery cables before applying AC power.
No, the order of paragraphs in manual doesn’t mean the order of connecting AC/DC.
There is no such text on the front cover. The text on the cover says: “Disconnect the supply before making or breaking the connection to the battery”.
There is lot of funny recommendations in this manual like "Do not lift heavy objects unassisted
", but really necessary information is missing or nот clear.
PS: Solution with 24V DC power supply instead of battery worked for me.