Then add 10 of the charging time.
How much solar panel to charge 4 batteries in series.
Then divide the battery capacity which is 50 ah by the ampere per hour rating of the solar panel which is 1 25 amps which will be the charging time.
A single solar panel of 280 watts will do the work for you.
So you could use a solar module that has a vmp of 26 28v.
If you have a 50 volt and 10 amp current coming from your solar panels but only want 15 volts the pnw charge controller will send a 15 volt 10 amp current into your battery.
This is less than ideal due to the wasted energy.
You generally want to have the vmp of the solar panels 10 20 higher than the battery voltage.
So you need 1200 250 4 8 hours of bright sunlight.
Charging time 50 ah 1 25 amps 10 of ct ave.
You should use a charge controller to protect the equipment.
If you connect the four 6 volt batteries in series then its like one 24 volt battery.