BFL13 wrote:
So with a low charging rate like solar does, your "window" to be in Absorption is quite narrow between 90 something when you get to Vabs and 97% when you trigger Float.
However some controllers have no Float to trigger, so they just stay at Vabs until dark once they reach Vabs. Others have a timed Absorption Stage like two hours so they could go past 97% before dropping to Float. Others have adjustable Float and Absorption voltages. If you want a longer Absorption stage, you can make your Float voltage the same as your Vabs, so it will stay at your Vabs until dark.
BFL - it's a good explanation, thanks. I had a feeling that somehow my system was responsible for what I see, now I know why. Hopefully OP will get a decent controller that allows some tweaking of setpoints, to reach "true 99.999% SOC".
