Can an 80W Solar Panel Charge a 12V Battery?
30Ah x 12V = Watts Watts / sunlight hours = solar panel watts needed. In this case, multiply 30 by 12 and you get 360. Divide 360 by 6 and you get 60 watts. So an 80 watt solar panel like the Sunpals Solar Panel Kit is sufficient to charge a 30Ah 12V battery in 6 hours. If you have a larger solar panel then the charge time will be faster.