Does this sound right ??

Arkansasoffgrid
Arkansasoffgrid Solar Expert Posts: 117 ✭✭
in Solar Beginners Corner #1
On my line drawing from Blue Pacific Solar, they have 3-#8 awg and 1 #10 ground from magnum ms4448pae to 200 amp breaker panel 120/240ac. Some reason I thought the wires from inverter to ac panel would have been larger.
8-420AH US Battery L-16s, Midnite Classic 150cc, Whiz Bang Jr, Magnum MS4448PAE inverter/charger,  4590w Canadian Solar panels. Honda EU2000i generator.
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  • waynefromnscanada
    waynefromnscanada Solar Expert Posts: 3,009 ✭✭✭✭
    #2
    Re: Does this sound right ??

    Specs on the inverter state 4400 watts. 4400/240 volts = 18.3 amps. Assuming double that on surge, you're looking at perhaps 40 amps AC per output leg. #8 wire is usually fused/breakered at 40 amps, so it would appear OK to handle the full output from your inverter.
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  • Arkansasoffgrid
    Arkansasoffgrid Solar Expert Posts: 117 ✭✭
    #3
    Re: Does this sound right ??

    So why have a "200 amp" main breaker ? Seems overkill.
    8-420AH US Battery L-16s, Midnite Classic 150cc, Whiz Bang Jr, Magnum MS4448PAE inverter/charger,  4590w Canadian Solar panels. Honda EU2000i generator.
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  • HX_Guy
    HX_Guy Solar Expert Posts: 296 ✭✭✭✭✭✭
    #4
    Re: Does this sound right ??

    Isn't the 200A main breaker your house service panel?
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  • Arkansasoffgrid
    Arkansasoffgrid Solar Expert Posts: 117 ✭✭
    #5
    Re: Does this sound right ??

    Yes, so why a 200amp main with only 2-40amp capacity wires feeding it?
    8-420AH US Battery L-16s, Midnite Classic 150cc, Whiz Bang Jr, Magnum MS4448PAE inverter/charger,  4590w Canadian Solar panels. Honda EU2000i generator.
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  • BB.
    BB. Super Moderators, Administrators Posts: 33,642 admin
    #6
    Re: Does this sound right ??

    If you every get utility power, there is no need to re-panel the home. Does not cost a lot more now--Vs redoing a home sometime in the future.

    In some cases, a building inspector may even require an off grid home to have "utility grade" panel+basic wiring requirements (one even required an AC meter socket for an off grid power system for a poster here).

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