Originally Posted by SECTLANDSCAPING
When I read your headline I was thinking you had a small panel, something like 2-3 amps but that is bad. Is that overkill for the batteries though?
I have two batteries wired parallel. The charger would take about a week to get them charged with sun all day on the long summer days. The controller does all the work, keeping them charged at a trickle and conditioning at the same time. While researching this I found that this system actually will give better performance and extend the life of the batteries.
I have used it for one week now and am wishing I had done this when I built the truck. One more 15 w panel would do a really good job but this set up works well. I sprayed 70 gallons on Thursday and left the job with 3/4 battery capacity.