September 1, 20233 yr I have 2 Mecer Expert MKS-II inverters in parallel (S/W version U1: 71-80), 5 PylonTech 2000 batteries and 12 405W solar panels in 2 strings. The problem is that every few weeks the inverters lose the setup and returns to the default setup. I assume the inverters resets for some reason, but no error codes are displayed, and operation is not disrupted.
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