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Solar panel charger for RC model car batteries

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  • #16
    Understood. That's what I meant to say, but it didn't come across that way.

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    • #17
      Understood. That's what I meant to say but it did not come across that way. Pardon my struggle with words (among other things)

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      • #18
        Based on the helpful comments and advice, this is what I came up with for sizing my project. Comments??


        Size system to recharge four 12V 3000mAh RC batteries
        4 x 12V x (3000mAh/1000) = 144 wh
        Size solar battery for twice the load: 2 x 144wh = 288 wh
        Converting to ah : 288 wh/12 V = 24 ah solar battery
        Need to replace 288 wh in solar battery with 6 hours of sunlight
        288 wh/6hr = 48 watt solar panel
        Adding 20% contingency: 48 x 1.2 = 60 watt panel

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        • #19
          1) Summer Solstice, you might get 6 hours of usable sunlight. More likely you will have 4 hours by them time you factor in poor alignment (aim) and some cloudy conditions

          2) Adding 20% contingency: 48 x 1.2 = 60 watt panel
          nope, more like 80% contingency is the realistic value.
          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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