You do realize even a small unregulated solar panel can over charge and damage the battery?
I have found that putting the solar panel behind vehicle glass tends to cut panel output by around half.
I have 180 watts of solar on top of my suburban and I would not expect it to increase fuel economy unless the belt is removed from the alternator.
A small solar panel like that, with its output cut in half wont do squat.
Save your money, do aero mods.
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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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