I tested panel inside the vehicle. Panels inside the vehicle are almost useless. Take what every the rating is on the panel and reduce it by about 60%.
Solar panels are only going to work placed on the out side of the vehicle.
It takes at least 50 or 60 watts, bare minimum to keep the battery up in my suburban and that was just driving it 8 miles a day.
Driving 50 miles round trip took more like 100 watts to keep the battery charged.
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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