Builiding of a complete 6kW PV inverter with MPPT chargers

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Regular Member

Joined: 11/01/2024
Location: Poland
Posts: 79
Posted: 07:53am 21 May 2024      

Small update about OVP mppt circuit. As I said earlier, I have a relay on the board that turns on/off the BAT-12V converter that powers all MPPTs. The converter has low ESR capacitors at the input, which stuck the relay together during one of the subsequent tests. So I'm making a small soft start circuit: a serial NTC thermistor, or a resistor + relay powered from the output.

Moreover, in this casing I placed a caps mppt pre-charging system - behind the kilovac relay, activated manually with a switch.