Solar Panels used to charge batteries. Answered
So I understand how the WestingHouse Solar Powered Outdoor Lights. They use the energy gathered by the solar panel, convert it and store it in AA batteries. The LEd is then powered by these batteries.
This is kind of a two part question. What exactly is stopping me from using a large Ni-Cd battery or even a car battery to be charged by an array of solar panels like the little ones that are used in the little outdoor lights??
Is there some sort of equation that would be helpful to estimate the amount of time it might take to charge these batteries?
Any help is appreciated. Thank you.