PV to Inverter fuses & or breakers

Pete4049Pete4049 Registered Users Posts: 4
Do I need protect negative wiring between PVs & inverter with a fuse or breaker?.  Should the GFP on positive wiring between PVs & inverter be placed ahead of or after the breaker?  Thanks


  • EstragonEstragon Registered Users Posts: 3,127 ✭✭✭✭✭
    Negative typically isn't fused (assuming negative ground system). Some charge controllers (eg Midnite classic) have GFP built in. If not, between the pv breaker and the charge controller I think.
    Main daytime system ~4kw panels into 2xMNClassic150 370ah 48v bank 2xOutback 3548 inverter 120v + 240v autotransformer
    Night system ~1kw panels into 1xMNClassic150 700ah 12v bank morningstar 300w inverter
  • BB.BB. Super Moderators, Administrators Posts: 28,315 admin
    Can you tell us more about your system, any components you have purchased our are thinking about purchasing?

    Is this in a vehicle, cabin, or other? DC loads and\or or AC inverter?

    Grounding is a complex subject. If done wrong, it can be worse than doing a half way job.

    Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
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