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Thanks. I was afraid of this ;)

I have new Easun SMG II 3.6KP. To inverter i have connected only 7xPV (NOCT 231V, 2471W) on input, without batteries and 2kW 230V water heater on output. Program set is "01 SOL". When I connecting heater i getting warning 15 "PV voltage is too low". Is any way to work with than heater when PV...