20W solar...need controller?
I have acquired a 20W solar panel that shows 20vdc when not connected to anything (in full sun). When hooked up to a 12v battery, I have seen it as high as 17vdc. I'm wondering if I can get away wit...
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That's why I recommended float but total disconnect protocol needed to be stated once again. I saw the number 5% per month self discharge used for AGM recently on this site. Perhaps in 115 degree weather or if the AGM battery is really old. One to 2% is common self discharge.
