Basic battery charging and solar question
I have a Surveyor 245BHS with 2 6v batteries wired in series. The RV dealer told me that when I'm plugged in to charge, the trailer doesn't recognize when the batteries are fully charged and will kee...
Forum Discussion
mike-s wrote:
A 12 W panel can ruin even a sizable battery bank by overcharging if used without a controller, so ignore those who claim 15 (or 50!) watts "is barely enough to provide the charge that your 2*6V lose in 24 hours due to" self-discharge/parasitic draw.
There's a lot of misinformation out there
And a lot of misquoted lines too :)...
It was said that "15W is barely enough to provide the charge that your 2*6V lose in 24 hours due to self-discharge". Not 50W. Neither did I suggest using 15W without a controller.
As to the parasitic draws, half the time people include the fridge draw in this - though I don't think this is correct.
PS: The linked article is a bit messy. He was charging 2 different banks, 220 AH and 125 AH, with a nominal 12V/12W panel, and measured overcharging on 220 AH AGM. This battery is AGM, very low self-discharge.
