Hello, everyone:
I have 100W X2 Renogy panels(RNG-100D, used), I use them to charge my 12V LiFePo4 (100A) for Aux pump (12V). I use MakeSkyBlue MPPT V118 for test them. (Battery type, Li, charge Voltage 14.40)
With single panel, shows Voltage 20.31, Watts 46.16, it is ok. (here in New York...