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...
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When charging directly from Meanwell and voltage got stuck at 14.15, it was directly on Meanwell output terminals. I installed a small meter on the Meanwell. Not at the end of a long wire to battery.
Voltage is still fluctuating now +/- 1V on the controller output with Meanwell feeding the controller, and Meanwell at 6A post-MPPT is just "warm", not hot. I think this fluctuation is the battery behavior, not Meanwell thermal protection mode.
Battery went up to 13.6V after 10 hours of charging at the average 8A, this is only 60% full or 72 AH. It will not get much better current with 200W solar. This is what worries me because Meanwell output measured by controller is now 1.1 KWH, this is 75 AH even after all imaginable losses. Battery was previously discharged to 12.5, which according to their manual is 90% DOD,12 AH remaining. 87 AH input and only 72 AH in the battery?
Has it been established that there is an adverse effect of low current on LFP charging? The only restriction on charging in the battery manual is max 0.2C or 24A in this case, and they allow a higher current for a short time.
Voltage is still fluctuating now +/- 1V on the controller output with Meanwell feeding the controller, and Meanwell at 6A post-MPPT is just "warm", not hot. I think this fluctuation is the battery behavior, not Meanwell thermal protection mode.
Battery went up to 13.6V after 10 hours of charging at the average 8A, this is only 60% full or 72 AH. It will not get much better current with 200W solar. This is what worries me because Meanwell output measured by controller is now 1.1 KWH, this is 75 AH even after all imaginable losses. Battery was previously discharged to 12.5, which according to their manual is 90% DOD,12 AH remaining. 87 AH input and only 72 AH in the battery?
Has it been established that there is an adverse effect of low current on LFP charging? The only restriction on charging in the battery manual is max 0.2C or 24A in this case, and they allow a higher current for a short time.
