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 suspect that your current panel may be marginal but as noted it depends on your parasitic loads. You can monitor your battery volatge in the morning before charging starts for a week or so to determine if it is staying at 12.6 to 12.7 or decreasing.
You can also measure your parasitic load and do the calculation of how many AH you will need to maintain your battery.
I have maintained a single RV 12V battery in the past here in TX with a 10W panel with some parasitic loads eliminated by pulling a fuse. I think if you go above 5W you should have a controller to prevent overcharging.
Dick
You can also measure your parasitic load and do the calculation of how many AH you will need to maintain your battery.
I have maintained a single RV 12V battery in the past here in TX with a 10W panel with some parasitic loads eliminated by pulling a fuse. I think if you go above 5W you should have a controller to prevent overcharging.
Dick
