Rainy days, solar panels can also charge, just according to the degree of rainy day charge will be different.
solar street lights are equipped with battery charging and discharging device, when the sun foot at ordinary times can recharge itself, rainy day battery power for a street lamp power supply. Solar panels in the strong light of the sun, large amount of charge. In cloudy or rainy days, the sun's light is weak charge is relatively weak, charging amount is very small.