Size of solar maintainer for car battery?
Had a 2.4W panel for $30 or so, on my truck while in storage. Seemed to be adequate at latitude 27 with plenty of sun and almost no clouds. Flat on the roof. Didn't worry much because the battery was...
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I have the exact charger (5 watt) and have used it for 4 winters to date. The vehicle is a Ford with 2 batteries. The truck may sit for 7-10 days outside between use. Prior to using the charger the batteries would be low and the engine would start but turn over slower then it should. With the charger I connect it immediately after shutdown from a drive. I use the lighter plug and lay the panel on the dash. When I start the truck again the engine turns over and starts normally. The charger works for me. :C
