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  • Diodes?

    i read a little bit about them and the onlything i can find out if they are used in solar panels to keep the energy from flowing back into them during night and wasting energy is that pretty much the only reason they are on panels? also do they put diodes on both the + and -?

  • #2
    diodes are used for 2 reasons in PV panels.

    1) [B]Bypass[/B], in case the panel gets shaded, there are often several segments with bypass diodes to allow array current to flow, or else 1 shaded panel can kill a whole array.

    2) Nighttime reverse current [B]Blocking[/B]. To keep the batteries from draining into a dark panel. Most charge controllers prevent this from happening too.
    Powerfab top of pole PV mount (2) | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe Battery (in series)| 15, Evergreen 205w "12V" PV array on pole | Midnight ePanel | Grundfos 10 SO5-9 with 3 wire Franklin Electric motor (1/2hp 240V 1ph ) on a timer for 3 hr noontime run - Runs off PV ||
    || Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
    || VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A

    solar: http://tinyurl.com/LMR-Solar
    gen: http://tinyurl.com/LMR-Lister