p.v.solar project

Discussion in 'The Projects Forum' started by mgt55, Jul 8, 2012.

  1. mgt55

    Thread Starter New Member

    Jul 8, 2012
    1
    0
    my solar contractor said he would use 4 ot copper wire on the 300 ft. run from inverter to main 200 amp panel.later I found he used 1 ot alluminum.I want to know what is the difference. it is a 96.6 KW size with 42 panels
     
  2. BSomer

    Member

    Dec 28, 2011
    433
    106
    There is a BIG difference between 4/0 copper and 1/0 aluminum, a little over 100 Amps difference. 4/0 copper is rated for 230 amps and 1/0 aluminum is rated for 120 amps

    Not sure where you are located, but here in the US we follow the National Electrical Code (NEC). The size of wire used depends on if this is for a residential use or commercial. If in a residential application you need to have at a minimum 2/0 copper or 4/0 aluminum for a 200 amp service.
     
  3. Bernard

    AAC Fanatic!

    Aug 7, 2008
    4,172
    397
    Is that 96 kW or 9.6 kW? My 24, 230 W, panels are rated at 5.5 kW or about 20 A @ 240 V.
     
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