>>1977954>This looks like the perfect device to keep my car battery topped up if I'm not driving much.Same guy as
>>1978023There are small kits made exactly for that, although they are usually just for trickle charging, low power, at most 5W.
Usually it's a small panel plus battery clamps and/or car lighter plug. Like pic related.
Don't ask me if they are worth a shit, my guess would be "not worth the asked price".