So I just took the plunge on a moderately priced charger from a large online distributor who shall remain unnamed. ;-) The reviews on it suggested it will do what I want it to do, even if it won't do what the manufacturers advertise it to do. I can live with that for now. The immediate impetus....with an addendum below....is the charging of an 100 Ah LiFePO4 (100A BMS) battery. Without going into the rather unusual background of the issue, a reading lamp in the main living room space needs power and can't get it by other means (old house, limited outlets, unmentioned impediment to extension cord use). I debated converting the lamp to 12V (can an E26 socket be rewired or relabeled +/- to be used as 12V?.....Do 12V bulbs even come in an E26 configuration?), but wanted to test using an inverter and battery combo and stick with the current plug, cord, and wiring to see how long it could operate under our normal useage before needing to be recharged. The LED bulb in the socket is 12W and the inverter is 700W running. No fan noise under these conditions. The battery is bluetooth so one can monitor state of charge rather easily. It was actually a bit surprising to me how quickly that little bulb drained juice out of the battery. Unfortunately, I don't have the total number of hours to bring the battery from 100% down to 30% because of a strange occurrance....
Addendum: I check the battery status nightly and one day after it showed (bluetooth reading from BMS) a charge level of ~50%, my wife noted to me that she had turned off the inverter due to an 'insufficient charge' error code. This seemed odd, but sure enough when I connected the phone app, the battery was registering 0%! As my only LiFePO4 charger at the moment is a fixed 3A charger, I began a recharge and noticed it starting to fill as expected. The 4 individual cells were equally charging as well. Needless to say, charging that battery with this small charger will take some time (and monitoring of the temperature of the charger!) but eventually it got back to 100%. So I'm left confused about the precipitous charge drop from ~50% to 0%. I will note that even though the light was not on during this time, the inverter was.....normally the inverter is turned off after the light is turned off for the night.
The battery is now charged up again to 100%....single cell voltage at 3.4 across all 4 cells. Any thoughts on why this may have happened before I begin use again? The new charger will arrive any day now and can do LiFePO4 charging at 2, 10, and 25A, so hoping to get faster charging out of this unit. Also, I suspect conversion of the lamp to 12V would allow for longer operation before recharging due to eliminating inverter draw, correct? As always, thanks for insights and comments.