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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IMO it is important to call tech support and get balancing clarified as to how to tell it did that. You need to do balancing every so often.
That battery blurb says they made it 120AH on purpose so you could use 100AH without depleting it and triggering the BMS low voltage cut-off. IE they are going with 80% DOD as being proper for your low.
IMO that means the "real" voltage per SOC table should be for 120AH and your voltage for when you have used the 100AH will be above the "real" empty voltage of 10.0 v. How you use Wh or AH or voltage to determine how much capacity you have remaining is your choice. As is how much you decide is your "allowance" (eg all of that 100AH) to be your marker for how much you have left before hitting your own idea of bottom.
That notion is needed the day before, so you can decide if you need to recharge today or it can wait till tomorrow, knowing about how many AH you will be using till tomorrow.
On voltage for "full" it is 13.6v, but since voltage drops to 13.3ish as soon as you load it, in effect 99% SOC is 13.3, so that looks like what you are seeing.
So IMO you are seeing what is supposed to happen and all is good, except I think you should get that PowerMax LK 45 amp adjustable converter and ditch the low amp gizmo. YMMV. :)
That battery blurb says they made it 120AH on purpose so you could use 100AH without depleting it and triggering the BMS low voltage cut-off. IE they are going with 80% DOD as being proper for your low.
IMO that means the "real" voltage per SOC table should be for 120AH and your voltage for when you have used the 100AH will be above the "real" empty voltage of 10.0 v. How you use Wh or AH or voltage to determine how much capacity you have remaining is your choice. As is how much you decide is your "allowance" (eg all of that 100AH) to be your marker for how much you have left before hitting your own idea of bottom.
That notion is needed the day before, so you can decide if you need to recharge today or it can wait till tomorrow, knowing about how many AH you will be using till tomorrow.
On voltage for "full" it is 13.6v, but since voltage drops to 13.3ish as soon as you load it, in effect 99% SOC is 13.3, so that looks like what you are seeing.
So IMO you are seeing what is supposed to happen and all is good, except I think you should get that PowerMax LK 45 amp adjustable converter and ditch the low amp gizmo. YMMV. :)
