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RE: ASKING FOR A FRIEND #1: who can advise on if it’s possible to build a roof rack solar panel to charge a tesla over say, a week of reasonable sunshine?
I don't think a 480W panel would fit on the roof, but let's say it does.
50 hours of good sun a week makes 24kWh. Conversion losses and charging inefficiencies, say 8%, leaves 22kWh. That's a quarter of the battery capacity.
Roughly 8-).
interesting. yeah i doubt it would fit either but i would build some kind of canopy thing to fit in a trailor if that was the case, it would probably be 2 x 240 watts, i wonder how many miles a quarter tank of electric gets me, i'm guessing maybe 30/40 miles, so basically i could boondock for a week somewhere, charge her up in the week offgrid, drive another 30/40 miles and keep doing that ;) - interesting. . . ;)
I'm guessing a 200W panel would just fit, yielding about 9kWh per week. It's better than nothing, but still ...
if access to fuel, power was a problem, i'd take the drip feed anyday. .. like i said, i was asking for a friend ;)