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Old 04-15-2009, 05:39 PM   #3 (permalink)
MetroMPG
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Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 21,825

Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 53.56 mpg (US)

Winter beater Metro - '00 Chevrolet Metro
90 day: 61.98 mpg (US)

Fancy Metro - '14 Mitsubishi Mirage top spec
90 day: 58.72 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 61.46 mpg (US)
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Thanks for the idea.

One reason I thought of using the "merry-go-round" relay approach is that it's a more efficient use of the panel. I assumed there would be greater losses going through a DC-DC setup.

EDIT: also, I like the idea of hitting 12v pairs with higher current every N minutes, rather than 1/4 (or less) of the current at a constant 48+ volts nominal across the entire pack. The higher current will mix the electrolyte better, and may be more effective against preventing sulfation (an EE who is an EV owner mentioned that to me).
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