question

tommas avatar image
tommas asked

Only charge batteries when the grid is overloaded In ESS

hello, in my situation there is an overload of the grid in the region causing the grid connected inverters to fail due to overvoltage.

at the moment this happens the batteries are already fully charged, so my question is, is there a way to configure ess in such a way that the batteries are only charged at a mains voltage above 253v? so that the batteries are used as a dumpload?


setup:

1-phase

2x multiplus2 48/3000 parallel

2000Wp DC coupled(mppt)

4500Wp connected to grid(measured by em24s)

1500Wp AC coupled

ESS parallel (em24 in meter box)

lithium storage 14kwh (2-wire bms)


thanks in advance!

ESS
2 |3000
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1 Answer
tnt369 avatar image
tnt369 answered ·

Hmm, interesting task. It might be possible to solve it with an external controller via Modbus. I would read out the mains voltage permanently and activate the battery charge depending on it (register 38 of the VE.bus).


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