Got a problem with my EB3A, after a few month of usage (bad power, undervoltage etc) it started turning off after discharge, like completely turning off and not charging when connected to the socket. I figured out it can be brought back by giving it 12V, after that it accepts power from wall socket and starts charging, but it shows battery charge at 90% from start. It still takes correct time to fully charge, and it bears load correctly.
Any suggestions or do I need to search for repairs?
Try completely draining to 0 percent followed immediately by charging to 100% via slow charge. Repeat this process twice and see if the situation is resolved.
@arcade And to add to what Scott mentioned above… when you’re charging it up to 100%… leave it plugged (also make sure nothing is plugged into the outputs and that they are all “off”) after the unit displays 100% until you see the input wattage drop to 0 watts coming in. Sometimes the BMS needs to be re-calibrated from time to time and by leaving it plugged into the charging source, it will eventually top-balance. But its important to let the unit keep charging until it doesnt allow any more incoming wattage to come in.
Yeah, thought about that too and already attempted to calibrate 3 times:
Connecting only one steady drain ~100W.
Disconnecting everything (starting via 12V if needed) and charging to 100%.
Repeating cycle.
Well, now it is able to start from AC power. On the other hand I now have a Voltage regulator. ALAS, place I’m working doesn’t smell like civilization - voltage jumps from 230 to 170 depending on load, blackouts are quite common. I actually used EcoFlow + voltage regulator last time to keep it charging steadily.
I’ll try draining it one more time after EcoFlow calibration would be complete.