Dear all, I’m having a hard time with my Growatt SPF5000ES. It keeps burning the Mosfets from the DC-DC converter and DC-AC inverter from the main board with no warning or fault before. Just after that it gives error 52 ‘low bus voltage’, bus voltage start failed’. It does it every time after the battery gets to 100%. The setup is 12 x 455w Longi panels, 2 x Pytes 5.12kw/h, 20 amps fuse and 20 amps breaker on the panels input, 100amp fuse in the battery input, 32amps breakers on the input from the grid and on the output from the inverter to the house. After the first inverter failed after 8 months I bought another one witch failed after one month and was replaced with the first one witch I repaired and failed again after almost one month. The problem appears during the summer. Didn’t have any issues during the cold season. I’m tired of replacing mosfets . Hope I was clear enough. Any ideas? Thanks
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