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riaanm asked

Muliplus overload when charging Lithium Phosphate batteries

My system consist of a Mulitplus 48/800, a Bluesolar MMMT150/35, Venus GX and 3 x 255W solar panels.

At first I used a 48V/100AH gel battery bank but recently replaced it with a Lithium Phosphate 48V/120AH bank with BMS. I changed the battery type in VE configure from gell to Lithium and used the default values. There are no comms between the charger and the BMS.

Since the switch to lithium batteries the system report a AC overload every day at around midday and this overload /recovering last for up to 30 minutes. The AC load is < 100W.

It seems to happen when the batteries are fully charged. This never happened with the gel batteries.

Any ideas please?

MultiPlus Quattro Inverter Charger
2 |3000

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