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Old 08-16-2022, 12:55 AM   #11 (permalink)
Isaac Zachary
High Altitude Hybrid
 
Join Date: Dec 2020
Location: Gunnison, CO
Posts: 2,083

Avalon - '13 Toyota Avalon HV
90 day: 40.45 mpg (US)

Prius - '06 Toyota Prius
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Maybe if you had a solar panel on the roof that kept the battery topped off (and off-gassing) and had a way of collecting that while the vehicle sits (would be an explosion hazard.

I don't think it's enough to make that much of a difference though. Maybe if you had a DIY hybrid with a truck bed full of lead acid batteries it would help a tenth of a mile per gallon.

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