Originally Posted by john61ct
Do you measure trailing amps at the bank before the SC transitions to Float?
Does it get to Float before mid-afternoon even when the bank got under 60-70% SoC overnight?.
Maybe just an adjustment extending absorb hold time will get you to 100%?
If you do hit that endAmps point, you could let the SG know, hit the 100% reset.
No, I don't measure trailing amps at the bank.
Float before mid afternoon? Yes and No. As you point out, the Absorption Phase is time limited. So the controller will go into float mode when one of two things has occurred. Either the battery
charge rate has reached less than 2 amps during constant voltage charging
( ie fully charged the bank ) OR the time limit of the absorption phase has been reached. Many mistake the latter for a fully charged bank. ( which is why I assume you are measuring trailing amps at the bank )
My Victron measures the bank voltage at controller start up in the morning and based on the state of discharge, determines a maximum absorption time. Assuming a steady discharge over night, the maximum limit is 6 hours. ( I cannot change or adjust that time limit ) So yes, by noon I am technically in "Float Mode" but depending on how much sunlight I actually managed to harvest in that time, my bank may or may not be fully charged. This is where I see a difference in what the smartgauge is telling me vs the Victron App and it makes perfect sense.
This is also where the Firefly's really shine because I don't sweat it if they don't reach 100% SOC. If say the solar
array gets me to 90% as per the smartgauge, the engine alternator
easily gets me to 100% if needed.
I try to avoid resetting the SG whenever possible because I think over time, that defeats it's purpose of actually "learning" what bank health