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Any Input would greatly appreaciated am still a newbe. How many solar panel/watts do I need to charge a battery on a reasonable time let say 3 hours. Here is my setup at home. I have four of 15 watts panel from harborfreight, and one 80 watts panel that i got form ebay. All together I have 140 watts solar panel. I am using the charge controller that come in the kit from harborfreignt. Now the battery I have 3 different battery sizes all 12volts/marine each that I got from wallmat, one 75amph, one 115amph and one 125amph. I made the mistake I should have gotten all the same amp h. I need to know how many more panel I need to get this battery charge on a reasonable time. Thanks.
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The great killer of batteries, is not keeping them charged !
You need to charge with at LEAST 3% of the battery capacity, if it's a 100AH battery, you need a 3A charge minimum, to keep it topped off. If you are using the battery, it's more like a 10-15% capacity (C) to recharge it with.
A 5W panel, at 14V, gives .357A not much.
An 80W panel @ 14V = 5.7A
Watts divide by volts = amps.
Batteries recharge at 14-15V, and produce 12V.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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