Programmable to chemistry and cell count/voltage. Currently set up for 66 LiFePo4 at 3.5 vpc or 231 volts. Has 10 programs and they are currently all LiFePo4 with 66+4 and 66-5. In other words, selectable between 198 volts and 245 volts. You decide.
have video of unit running from few weeks ago.