Hey All,
I have a 100/50 MPPT connected to 1200 watt solar at 60volt and to a leaf battery. I get a error 21 shutdown on the charge controller. The dealer sent a new one and it worked 2 days and the error came back on this one too. I checked all wires and turned out good. Last time it happened the battery was at 98%. Dealer said there is some sparking going on in the solar wires. But how can if there is no current flowing anymore. On the battery side, there was no load on except the inverter (multi) was on. After some research i only find this error on 100/50s not on any other controllers.
can anybody shine some light on my problem?
