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Old 02-08-2011, 04:35 PM   #25 (permalink)
EcoModding Lurker
Join Date: Sep 2010
Location: Ohio
Posts: 18

The Beater - '99 Honda Civic EX
90 day: 39.89 mpg (US)
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Thanked 2 Times in 2 Posts
Okay well i'll try to do something constructive to help ya out then. Using the industy standard for reserve capacity of a battery (25A continous) An optima yellow top (deep cycle) has a 100 min reserve capacity and a 48Ah rating. If you run it completely dead you are looking at 50-70 miles depending on how you drive.

25A*100min=41.5Ah Using a 10A charger you are looking at a little over 4Hrs to charge that back up. 41.5A*12v=498 Whr/1000=.5 kWh per charge

You have a 50 mile commute letís say your car gets 40 mpg now, thatís 1000 miles a month 1000miles/40mpg=25 gallons of gas

Lets say your modification gets you 45mpg. 1000miles/45mpg=22.22Gallons
You save 25 gallons-22.22 gallons=2.78 gallons*3=$8.34 a month

Current Electric pricing in my area at least is $.11 kWh
cost to charge the pack everyday .5 kWh *.11=$.055 a day

In one month you drive roughly 20 days back and forth to work you would use $1.10 worth of electricity, and save about $7.24 in fuel.

On the battery note if your using 4/3 cells you would need 11 of them to get the 13.2 volts that you needed, and to get the 50Ah you would need 11 sets of 11 or 121 cells to replace your starting battery. Good luck!

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