Generally a fully discharged 12 volt 100ah battery needs 1200 watts of energy to be 100 recharged.
How many solar panels to charge deep cycle battery.
Charge 100ah battery standard size solar panel is 58 inches by 27 inches 2 solar panel for 150 watts 12 volt each for 5 sunshine light hour takes to recharge 100ah 12 volt battery.
It safeguards the deep cycle batteries from being overcharged during the day.
However the more important thing is to determine the power requirements of your home to determine the best suitable components for your solar system.
After tapping solar energy from the sun there is a need to store this energy by using batteries as they are known to be a stable and dependable source of power for the home.