Electric conversion: Project ForkenSwiift - Page 76 - Fuelly Forums

Android Users - Coming Soon! - Migrating from aCar 4.8 to 5.0

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Old 09-18-2007, 06:24 PM   #751
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People keep asking me how much it costs to drive (recharge) the ForkenSwift. So without further ado...

After 20+ km of driving, the pack takes about 24 hours to recharge, using the slow, "semi-smart" (voltage sensing, auto shut-off) 24vdc/10A charger. That's splitting the pack, 12 hours on the back 4 batts, then 12 hrs on the front 4.

Yes, 10A is that slow.

3.6 amps (24v charger) at 120 volts AC =
432 watts total

24 hours per charge for 25 km
10368 watt hours per charge

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

0.62208 $ per charge
25 km/charge
0.024883 $ per km
2.5 cents/km

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

0.93312 $ per charge
25 km/charge
0.037325 $ per km
3.7 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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Old 09-18-2007, 06:31 PM   #752
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Nice price write up! Make ivan get the same power you have now...
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Old 09-18-2007, 06:57 PM   #753
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Just realized I can calculate the car's energy efficiency from these figures...

(10368 wh / 25 km) / 1.61 km/mi = 257.59 wh/mile

And that's based on charging. Discount the charging inefficiencies (as I believe is standard practice in talking about wh/mi), and it's better than that. I'm not sure what the charging efficiency is though.
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Old 09-19-2007, 06:42 PM   #754
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Soon there will be no more 48v cables
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Old 09-19-2007, 06:57 PM   #755
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You're crazy, you know that?
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Old 09-23-2007, 05:32 PM   #756
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Spent some more time on things this weekend
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Old 09-23-2007, 05:52 PM   #757
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Oh, and trebuchet - I was talking to someone last week who made an electric outboard (DC with lithium) and experienced controller failure (overheated it) ... it failed fully on.
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Old 09-24-2007, 05:06 AM   #758
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Quote:
Originally Posted by MetroMPG View Post
Oh, and trebuchet - I was talking to someone last week who made an electric outboard (DC with lithium) and experienced controller failure (overheated it) ... it failed fully on.
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Old 09-26-2007, 06:18 PM   #759
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I think the single task I've spent the longest on so far is this
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Old 09-26-2007, 06:26 PM   #760
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Whee! I guess I just won this
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