RV Voltages too high while charging
I have a problem and have been wrapping my head around this for a few days. I have four 100w Solar panels, and a Morningstar RJ-45 programmable charge controller wired to batteries. I have Four In...
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Let's look at those recommendations from U.S. Battery. On page 5, 2 stage charging, it says to bring the bank to less than or equal to 3% of C, at 14.7v. If I brought my 430 ah bank to 13a @14.7v, it would not be full. I usually bring it to about 2.5a at 14.8v... a huge difference... lower acceptance at a higher voltage means way deeper into the charge. So, yes, those charts are a great visual tool, but the numbers must not be taken literally.
And look at page 6, 3 stage charging. While current is limited at 3% during stage 3, voltage rises. And during stage 4 (EQ), voltage is limited so current tapers. As the song goes..., "That's just the way it is. Somethings'll never change".
As for that 15.3v the dealer says for my bank, I really don't know where he came up with that? For all I know, he may have just pulled it out of his... !
And look at page 6, 3 stage charging. While current is limited at 3% during stage 3, voltage rises. And during stage 4 (EQ), voltage is limited so current tapers. As the song goes..., "That's just the way it is. Somethings'll never change".
As for that 15.3v the dealer says for my bank, I really don't know where he came up with that? For all I know, he may have just pulled it out of his... !
