Daly BMS gone crazy..Update Opinions
I was charging my 120ah lifepo4 battery yesterday and came in for lunch and saw it shut down..I figured it hit the 3.65 volt cell limit and shut down,I went out to check it and saw this on the Blueto...
Forum Discussion
For sure, you can't use your AH counting battery monitor for knowing when the batts are "full". Monitors get out of whack and need to be "zeroed" fairly often to keep them reasonably accurate for their display of SOC.
You zero the monitor when the battery is actually full, so you need another way to tell when that is.
EG with FLA you use an hydrometer and get the SG. With AGM you need an ammeter to observe when amps taper to 0.5a/100AH of bank. So there must be a "tell" for LFP also, that you use to zero the monitor.
I would not use the charger's idea of "full". With an AGM, and the charger set to "AGM", howinheck can it know when amps have tapered to 0.5a/100AH? No way! Same thing with whatever "full" is with LFP IMO.
The OP is liking those chargers with all kinds of read-outs, but IMO they are highly dubious. Prefer to set the voltage myself and get the info on when to stop the charge separately from other indications.
Have to look it up, but didn't BB say to charge until balancing act and then leave it on for another ?20 minutes? and call it "full"? So that would be "somewhere close" rather than knowing for sure, but then do you need to know bang on with an LFP that will not sulphate?
What is "good enough" so you can zero the monitor?
You zero the monitor when the battery is actually full, so you need another way to tell when that is.
EG with FLA you use an hydrometer and get the SG. With AGM you need an ammeter to observe when amps taper to 0.5a/100AH of bank. So there must be a "tell" for LFP also, that you use to zero the monitor.
I would not use the charger's idea of "full". With an AGM, and the charger set to "AGM", howinheck can it know when amps have tapered to 0.5a/100AH? No way! Same thing with whatever "full" is with LFP IMO.
The OP is liking those chargers with all kinds of read-outs, but IMO they are highly dubious. Prefer to set the voltage myself and get the info on when to stop the charge separately from other indications.
Have to look it up, but didn't BB say to charge until balancing act and then leave it on for another ?20 minutes? and call it "full"? So that would be "somewhere close" rather than knowing for sure, but then do you need to know bang on with an LFP that will not sulphate?
What is "good enough" so you can zero the monitor?
