October 19, 2025Oct 19 Hey everyone,I’ve been facing a strange issue with my 5 kW inverter lately. Whenever I turn it off and disconnect it from both PV and solar inputs for cleaning, it just refuses to power back on using the battery only. The screen flickers for a second and then goes off — no countdown, nothing. Tried several times, same result.If I turn on the solar breaker afterward, it sometimes throws random fault codes — usually Fault 58 or Fault 32 — for no clear reason. Then, if I switch off the battery breaker and start it up using PV only, it boots up normally. Once it’s running, I can turn the battery breaker back on and it’ll pick up the battery input without any issue.The batteries seem fine — I usually discharge them at night to around 48.5 V, with still decent backup available to use.Today I reconnected the inverter to the grid (it was disconnected before), but now it won’t start at all. On battery mode, it just flickers and shuts off immediately. When I try to power it via the grid, it gives Fault 32 again. Unfortunately, it’s nighttime, so I can’t test it with PV input right now — but I’m guessing it would probably start if PV were available.Has anyone faced a similar issue or know what might be the problem?
October 20, 2025Oct 20 Hi. Check the capacitors. Error 58 is low voltage. Error 32 is a communication failure between the display board and the capacitors in the power supply. Check them.
October 20, 2025Oct 20 Author 8 hours ago, YRIIY said:Hi. Check the capacitors. Error 58 is low voltage. Error 32 is a communication failure between the display board and the capacitors in the power supply. Check them.Thank you for your response. I have suspected the same reason of bad capacitors being the root cause. I am attaching the picture of inverter PCB the highlighted capacitors seem to be bulged up, haven’t got time to check via multimeter. The inverter got started itself on PV mode in the morning after showing multiple faults, i.e. fault 02, fault 09 and eventually got stuck on fault 32, after several failed attempts left it on fault code 32 on display took several minutes and booted up successfully on its own. I am attaching the picture, check it and let me what do you thin
October 20, 2025Oct 20 I'm thinking about replacing them. Preferably, everything near the power supplies. Or at least measure them with an ESR tester.
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