solarMax
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solarMax got a reaction from Coulomb in MPPT Patch for EAsun InverterThanks for the clarification. It may well be that the inverters did not use the best optocouplers.
Thank you very much for your support. I solved the problem in a similar way. I created a flash dump from one of the inverters where the update worked and flashed it onto the “defective” one. Now everything is working perfectly again.