Hi, the errors continued after that. There was also an overcharge error and a ripple error as well. The system is an on-grid one and the error only appeared in the evening when there was no solar production. Those errors sent me to check all the connections on the battery side and I found, to my shame, on the multiplus master L3 the “+” and “-” screws very loose, tightened only with my free hand, without a torque wrench. I set the wrench to 12 and fixed it. It worked like that for about 1 year, I was very lucky that it didn’t catch fire. I followed the installation specifications with a 70 mmp cable and a spring washer and I think that mitigated the heat emitted. Thanks for the advice and support.