November 28, 20241 yr Hi everyone, I have a WKS Evo Max II 10kVA, that is the same as the Axpert one. I noticed that it consumes 35VA from the grid when it is in battery mode, and there is no solar power. I think this is strange. I know that these inverters consume around 70W when there is no load and some people complain about this I understand that it must consume some power to make the inverter run. What I don't understand is why does it take it from the grid and not from the batteries ? If I cut the grid completely the inverter still runs fine, and from the batteries only of course. the aim of such hybrid inverters is to lower the grid invoice, so it must take the less possible energy from the grid I see that the wks is an european brand of the same Axpert you have in australia, but can someone explain me why these 35VA ? or may be it's a default from my inverter ? do you notice this with your inverter too ? thanks. Edited November 28, 20241 yr by Kripton2035
November 29, 20241 yr 4 hours ago, Kripton2035 said: I noticed that it consumes 35VA from the grid when it is in battery mode, That's probably almost entirely reactive, so you won't pay much for that. It's because of the capacitor at the end of the LC (inductor-capacitor) filter, needed to turn the pulses from the DC->AC converter into a smooth sine wave.
November 29, 20241 yr Author well it is not reactive as two days ago was a full day of sun, and I had 0.8kWh displayed on the grid counter... a full year would be around 300kWh which is quite a lot for something that shouldn't be there... anyway I will add a relay to cut the grid when the battery is above 15% and the grid is not used using the small esp8266 module that already resets the inexact time in the inverter...
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