It's a good idea, but that's all (17.05.2019)
Anonymous134748517
The idea is good, it actually does work as it says, but forget about charging your battery to full. With a max of 0.8amp of current (clear sky, sunny), it's only good to 'keep' your battery alive when it is already charged. If not, it will take months to restore it to full capacity, I mean, my cellphone charges at 2.1amps, immagine! For a car I'd suggest to forget it.