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Yep, even with it sitting in the sun for 8hrs a day. As I mention in my first post a lot, we have to think about worst case scenario. Worst case is a cloudy week. Unless you have a massive battery, its not going to last a week for you, let alone a week in winter when there is nowhere near 8 hours of sun per day. Then, you add in the other little factors like the windows have UV protection and/or tinting which reduce the panel output. And solar panel output isn't optimal unless the panel is tilted perpendicular to the sun (ie sitting on a dash). The little things start adding up, and the size of the panel you need keeps going up, and you still need a charger for that week where there is absolutely no sun.
A few guys have done it, and I agree its a very cool idea. But IMO there are a lot of other mods that are a lot more beneficial and reduce my commuting cost a lot more. Thus its an idea I'd consider, but its way down on my list to the point I'll probably never get to it.
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