MPPT 150/135
2*200 Watt Mono Panels (on a boat)
Smart BVM-712
4*6v Wet Cell 230AH (SLGI115)
Controller:
14.7 Absorption
13.95 Float
15.15 Equalization
Monitor:
Charged Voltage: 14.4
Tail Current: 4%
Charged detection time: 15m
Peukert Exponent:1.25
Latest firmware on both as of last week.
Issues:
Mainly, the equalization cycle lasts only about an hour and doesn't seem to care what the voltage is (it was at 14.4v when it stopped and went to "float"). I was cycling it manually after it went into absorption mode. Second time, same result (though at 14.6v this time). Seems broken / bad design or I have some other issue. How can I make it stay on until the 15.15v that I have it set to is reached?
Secondly, the BVM-712 percentage is rather useless if I can't turn the "Charged detection time" setting completely off. It causes massive drift even at the max setting (15 minutes). I've had it jump from 85% to 100% late in the afternoon when it's getting a very low trickle charge. Is there any way to turn this feature completely off? It seems completely useless for a solar setup where the charging current is commonly going to be < than the tail current for extended periods of time in the morning, evening and during a storm. Or am I just misunderstanding what the definition of this setting is? Please tell me if I'm wrong, but it seems like it would regularly cause drift in solar setups even at the max minutes