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Old 11-27-2007, 06:48 PM   #474 (permalink)
MetroMPG
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Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 20,785

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

MPGiata - '90 Mazda Miata
Last 3: 51.27 mpg (US)

Winter beater Metro - '00 Chevrolet Metro
90 day: 58.31 mpg (US)
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10-16-2007, 07:29 Pm

Got my Killawatt equivalent on the weekend.

Good thing too - the car is way more efficient than I estimated before!

I estimated electricity use based on the nominal 120vac draw listed on the tag on the 24v/5A charger. But charger current tapers down as the batteries charge, so its average current is much less than nominal. Also, the charger switches on/off regularly (thermal protection) when supplying the first (highest current) part of the charge.

I wouldn't have clued in to either of these things without the energy meter.

So...

23.x hours per charge for 24.8 km travelled
5.1 kwh consumed (per the Killawatt) using the 24v/5A charger

@ 6 cents per kwh (standard Ontario energy mix rate - Ivan's house)

0.306 $ per charge
24.8 km/charge
0.012399 $ per km
1.2 cents/km

@ 9.1 cents per kwh (100% renewable energy rate - my house)

0.4641 $ per charge
24.8 km/charge
0.018714 $ per km
1.9 cents/km

Compare to gasoline cost for the Blackfly @ 75 mpg (US) & $1 / L ...

3.14 L/100 km (3.14 = 75 mpg (US))
0.0314 L/km
1 $/L
0.0314 $/km
3.1 cents/km
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EcoModder
has launched a forum for the efficient new Mitsubishi Mirage
www.MetroMPG.com - fuel efficiency info for Geo Metro owners
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