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Sunlight, power, day length, expected harvest = PV Watts

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  • Sunlight, power, day length, expected harvest = PV Watts

    After you've established what your load is, here is where to look for size of array needed to power it.
    http://www.nrel.gov/rredc/pvwatts/

    PVWatts can take your location, panel aim & tilt, and tell you how much, on average, to expect from it.

    for grid tie, the numbers are pretty close. For battery/off grid, you may need almost 2x the PV array to account for losses in battery charging.
    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
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