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I'm having a hard time figuring out how to get my Rev C GS6 to enter float automatically after the absorb charge. It seems to stay at the bulk/absorb voltage indefinitely and I must manually select float. Not sure if I'm misunderstanding the setting or doing something wrong. Input is from 120v at 2.5 amps. Input seems to level off at around 1 amp on absorb on roughly 11kwh of lead acid.
I'm having a hard time figuring out how to get my Rev C GS6 to enter float automatically after the absorb charge. It seems to stay at the bulk/absorb voltage indefinitely and I must manually select float. Not sure if I'm misunderstanding the setting or doing something wrong. Input is from 120v at 2.5 amps. Input seems to level off at around 1 amp on absorb on roughly 11kwh of lead acid.
60 minutes...that's a pretty long time. I'm suspecting that during that while, voltage fluctuations or otherwise keep "bumping" the charge state from constant-voltage (timer active) to constant-current (which would reset the timer). If this is the case, I would need to put a threshold on the timer reset so it's not easily triggered.
I'm suspecting that during that while, voltage fluctuations or otherwise keep "bumping" the charge state from constant-voltage (timer active) to constant-current (which would reset the timer).
I switched it to 15 minutes and after waiting roughly 45 minutes I manually switched it to float. I watched the voltage for a couple minutes and saw it slowly fluctuating 0.22v
FYI, the Shunts i use have a "charged voltage", "charged current" and "charged detection timer" setting used to determine when it's charged.
These might be an alternative to absorb-timer? Which is possibly too rigid of a setting? When reaching voltage-limited charge, wait for the current to drop below certain % of the battery capacity (aka 2% = 4A for a 200Ah Bank) for a period of time (usually a few minutes), then switch to float.
Another good reference would be Balmar's external alternator regulators. (particularly their FbA and FFL settings)
Battery charging is quite an art in-and-of-itself.
Battery charging is quite an art in-and-of-itself.
Yes you can go very in deapth with charging. The current sensing method is the preferred method but not really justifiable for my application. My application is basically just for backup. I have very little loss in my batteries so my whole system is off most of the time just waiting for an outage in which case I have to manually connect it and turn it on.
@Cali-Carlos It's taken me far too long, but I've finally gotten back to the GS code, and added a ~2 minute hysteresis on the Float/Bulk switch. That way, small random regulation CC/CV flag noise doesn't constantly reset the "Absorb Tmr" (preventing Float). Should solve the issue ;-).
Also fixing a few dumb bugs + adding some new features for misusing the generator start relays as configurable signal/control outputs...hopefully I'll be able to release 1.2r6 before too long here.
