For 3x400 W Sunpower Maxeon (400 W, Voc 75.6, Isc 6.58) solar panels in series, is MPPT 250/60 a good choice? I have three 48V Pylontech 5000 batteries.
The MPPT excel calculator says it is ok, but I am not sure if I have everything right and if I have entered all the data correctly in the excel.
At minus 19 degrees, the spreadsheet says that the MPPT 250 is no good. Should I expect such a cold panel temperature?