PWM controller with no float
OK, I have a Morningstar Sunsaver 20a PWM controller. It's not the current generation, which is a 3-stage unit. It's basically a 2-stage without the float stage. It delivers full amps till the targ...
Forum Discussion
BFL13 wrote:
Mex says the constant float voltage is better than anything, but you do need shore power for that. So then you might ask, if solar is second best, how much farther off second best is that two stage thing?
I don't know.
I believe Mex is correct. The purpose of float should be to hold the battery at stasis, neither charging nor discharging. In theory, this suspends any chemical reactions and leads to longer life.
Daily solar cycling is a cycle of discharge then recharge. A while back, I proposed to Mex that a nightly draw of 3% and then followed by a daily full solar recharge would give about a 13 year life; he agreed.
At those magnitudes, it doesn't matter.
HTH;
John
