I have built a lithium ion 3s 16 p battery each cell is 3000 mili amp hour. The problem was that my inverters minimum input voltage was 11 so as soon as the batteries voltage went below 11 volts (the capacity of the battery was still pretty high) it shut off. My solution was to rearrange the cells into a 4s 12p configuration, however, the voltage than was too high at 16.4 volts. I was wondering if there was any way to adjust the input voltage on the inverter or if there was an inverter that could take 17 volts.