davidg wrote:GregoInc wrote:The pack contains 80 YUASA LEV40 cells... which I hope to integrate into my offgrid system. Basically each cell is 40Ah at 3.75 volts. So it will be 15 cells in series to make my 48 volt system.

Parallel Pairs and then series them you will use 32 of them then.

With 16 or even 15 of them in series, you might stuggle to find a suitable 48V inverter with a high enough HVD, A 60V inverter (not too many available) will work with 16 in series 16 * 3.75V = 60V.

For a 48V inverter use 14 cells in series (nominal 52.5V, 200AH = very similar to 16 LiFePO4 cells), you could have 5 strings of 14 cells, leaving 10 spare cells. Use the surplus to pick out the strongest 70.