I have looked it before on the net and I see that there are no solar powered charge controllers where it is specified to work with Lithium-Ion batteries. LiIon battery recharging needs several safety checks.

There are factor that can help you to determine the right size solar panel that will work effectively to fulfill your requirements. Solar panels are sized according to their wattage, that is, the number of watts that the panel is capable of outputting. A panel that is rated at 100 watts is capable o...