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 been using a Coleman CL-600 solar panel, 600ma, 15V, 9Watt, for about 5 years now. I have 2 panels: one for V10 starting-battery, and the other for the pair of 6V Trojan T105's.
MH is stored for 5 to 6 months with only the solar-panels. I check monthly and run engine, and generator (if temperature is around 20F or higher). Done to exercise both as needed. I always check batteries with volt-meter before starting engines. They are always found at full charge.
It should be noted that I have no currents drawing down batteries. If you have a radio with digital displays drawing current continuously you will need 5 or more watts.
MH is stored for 5 to 6 months with only the solar-panels. I check monthly and run engine, and generator (if temperature is around 20F or higher). Done to exercise both as needed. I always check batteries with volt-meter before starting engines. They are always found at full charge.
It should be noted that I have no currents drawing down batteries. If you have a radio with digital displays drawing current continuously you will need 5 or more watts.
