Charging LFP battery from AC-DC unit
Tried to charge LFP from Meanwell se-200-15. Lynac Lithium 120AH battery marketed as 100AH, you discharge to 80% DOD and get 100AH. Was partially charged already, resting 13.1V. Battery manual sugg...
Forum Discussion
BFL, thank you. I am looking at the charge curve for my particular battery https://www.lynaclithium.com/wp-content/uploads/2020/10/12.8V-100Ah-True-Series-Quick-Sheet.pdf. Long Absorption stage here is a gradually rising voltage from 13.3 to 13.6, at this point it's ~80% full - I was wrong earlier, it's 80% not 60. Hard to tell when the curve is almost flat.
Should be having a spike now but it's been hanging on at 13.6 for 3 hours. KWH counter on the controller input now reads 1.3 KWH, this is 80% full for 120AH battery. Will give it another several hours.
Do you mean that it takes longer when voltage is lower, regardless of how many AH you're pumping in there every hour?
Also, how can empty battery be 14.X at the beginning of charging? Max recommended voltage for my battery is 14.2. This is where it eventually arrives with charger still connected (and then drops to 13.8 resting).
Should be having a spike now but it's been hanging on at 13.6 for 3 hours. KWH counter on the controller input now reads 1.3 KWH, this is 80% full for 120AH battery. Will give it another several hours.
One article (which LFP folks here liked or hated depending on their moods of the day) said if you charge at less than 14.6 that was ok; it just meant you got a longer Absorption Stage.
Do you mean that it takes longer when voltage is lower, regardless of how many AH you're pumping in there every hour?
Also, how can empty battery be 14.X at the beginning of charging? Max recommended voltage for my battery is 14.2. This is where it eventually arrives with charger still connected (and then drops to 13.8 resting).
