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EcoWorld avatar image

Multiplus II not charging in charger mode but will charge batteries in inverter mode. No Leds on in charger mode and not charging with the generator but Leds all good when switched to inverter mode.

Multiplus II not charging 48v battery bank in charger mode but will charge batteries in inverter mode. No Leds on in charger mode and not charging with the generator but Leds all good when switched to inverter mode.

Multiplus-II
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EcoWorld avatar image
EcoWorld answered ·

The customer and I had the generator starting based on SOC below 70% and it all worked fine except that the charging amps remained zero while in charger mode. We shut off the generator, switched to inverter/charger mode and turned the generator back on and saw around 50A going into the batteries. So now the Multiplus II is left in Inverter/Charger mode all the time (not good) as it is not the primary inverter, its there as a 70A 48V charger mainly. It receives generator power via its AC1 Input and its AC output is wired over to a manual transfer switch in case the primary inverter ever fails. I intend to modify its settings to be in low power mode until I can work out what's going on or find an answer on this forum.

We can see the charging amps and other details via the advanced tab of the VRM interface graphs.

OT? (I'm also getting lots of interminent VE.Bus Low Voltage Warnings even though all the cables are secure and the battery voltages are healthy).

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Martijn Coster (Victron Energy Staff) avatar image
Martijn Coster (Victron Energy Staff) answered ·

Hello @ Ecoworld,
This sounds really strange. When in inverter mode there should be no battery charging.
How do you measure this? Where is the charging current comming from then?
You should have a Victron dealer have a look at the unit to test if it is not broken.

https://www.victronenergy.com/where-to-buy
gr. Martijn

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Wouldn’t it be able to charge in inverter/charger mode?

The puzzle is why isn’t it lighting up and charging in charger mode. The volts are present but zero amps flowing into the batterie.

Wouldn’t it be able to charge in inverter/charger mode?

The puzzle is why isn’t it lighting up and charging in charger mode. The volts are present but zero amps flowing into the batteries.