After a recent purchase of a pile of parts from a fellow DIY'r I started the battery building process. The 8 Ganfeng 277Ah cells were grouped into two sets of 4. I did an initial 4S set with me as the BMS charging at 14.2V (caution if you are a BMS, pay attention). When the pack approached a full charge, I switched it to 4P and hit it with 3.65V (5A supply takes a while). After days of monitoring and sneaking the cell voltage up to 3.65V, I left them 4P and put a headlamp load to slowly drain the charge down.
Very pleased with the results so far. Set them up to 4S, wired in the JBD BMS, dragged them into my trailer for a discharge test on my 600W inverter. They went from 277Ah to 2Ah and the cell delta stayed within 10mV. I need some cables to complete the install into the boxes from Solar Supply House and looking forward to upgrading the trailer battery capacity.
For the thrill seekers, I'm sad to report that this process has gone smoothly (nothing better than following instructions) didn't hook anything backwards or drop any tools on the pack.
Very pleased with the results so far. Set them up to 4S, wired in the JBD BMS, dragged them into my trailer for a discharge test on my 600W inverter. They went from 277Ah to 2Ah and the cell delta stayed within 10mV. I need some cables to complete the install into the boxes from Solar Supply House and looking forward to upgrading the trailer battery capacity.
For the thrill seekers, I'm sad to report that this process has gone smoothly (nothing better than following instructions) didn't hook anything backwards or drop any tools on the pack.