I have four 100 watt solar panels in series, total voc 89.2 volts, Vmp 74.4 volts, Isc 5.86 amps, Imp 5.38 amps. The nominal BlueSolar 100/20-48 panel spec is for 300 watts total PV, but this is for summer. I am wondering if it is safe to use the 4 100 watt panels for winter time operation when we have short days that are often cloudy? The 2 controller(s) are a BlueSolar 100/20-48 connected to a single 12 volt 200 AH LifePO4 battery.