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.
In cold conditions the PV output may go higher than in specs. You must not go over the MPPT limits or you will fry it.
Hi. You must stay within the voltage limits this is key or you will try it.
You can however use a smaller controller than your maximum theoretical amps you just wont get the max charge rate, yield may well be higher though.
Yes you can, but besides max input voltage, also check max input current from the panels!
The maximum input current is listed in the datasheets.
PS I'm moving this topic from the 'modifications' section.
