I have seen many discussions about using portable solar panels to charge an EV while camping or on a road trip. As has been often pointed out, trying to charge the car's batteries a significant amount just isn't practical. However, suppose you simply need to charge your EV just enough to drive a few miles. Then, even at the slow rate of charging that portable solar panels would provide, maybe you would only have to charge for a few hours. That would be preferable to calling a tow truck. I see lots of portable solar products on Amazon and on different solar companies' websites. Is it as simple as solar panels, battery, inverter? Somehow I think not. Any advice would be greatly appreciated. Thanks.