Litemup Posted August 25, 2014 at 11:18 PM Report Share Posted August 25, 2014 at 11:18 PM Is there a formula to figure out how much it costs to charge the battery. I know my electric cost is around .11 cents per kWh. Thanks Quote Link to comment Share on other sites More sharing options...
murphy Posted August 25, 2014 at 11:41 PM Report Share Posted August 25, 2014 at 11:41 PM The most I have ever put into my battery is 6.9 kWh. Not all of that makes it to the battery, some is lost as heat. 6.9 x 0.11 = 76 cents. Quote Link to comment Share on other sites More sharing options...
shaggy314 Posted August 29, 2014 at 08:11 PM Report Share Posted August 29, 2014 at 08:11 PM (edited) Plus there is a never used reserve of 1 kW+. When I'm asked I tell people under a dollar with virtually always <6 kW needed. Here in Austin it's $.12 kWh so 6*.12 = $.72 The only times I use more than 6 is GoTimes... A/C is hard draw. Edited August 29, 2014 at 08:11 PM by shaggy314 Quote Link to comment Share on other sites More sharing options...
Kybuck Posted August 30, 2014 at 12:20 AM Report Share Posted August 30, 2014 at 12:20 AM It also depends on the charging. L2 is more efficient than L1. My typical L1 charge takes ~8 kWh from the wall (metered with a Kill-A-Watt). Electricity from the wall is about 1.44x what the car reports. Quote Link to comment Share on other sites More sharing options...
Volleyguy Posted September 6, 2014 at 07:44 PM Report Share Posted September 6, 2014 at 07:44 PM KybuckWhat is the loss on L2 charging? We are looking at getting that right now. I do not think it will ever pay back until we get another electric car. Quote Link to comment Share on other sites More sharing options...
larryh Posted September 6, 2014 at 08:57 PM Report Share Posted September 6, 2014 at 08:57 PM (edited) L2 charging is about 82% efficient. L1 charging is about 72% efficient. The difference in electricity used to charge a fully depleted battery is less than 1 kWh. If you charge once a day, you will save less than 365 kWh of electricity a year. At $0.01 / kWh, that is $36.50 per year. You are not going to recover the cost of an L2 charger based on electricity savings alone, unless your electric rates are very high. Edited September 6, 2014 at 08:57 PM by larryh Quote Link to comment Share on other sites More sharing options...
shaggy314 Posted September 7, 2014 at 04:25 PM Report Share Posted September 7, 2014 at 04:25 PM (edited) L2 charging is about 82% efficient. L1 charging is about 72% efficient. The difference in electricity used to charge a fully depleted battery is less than 1 kWh. If you charge once a day, you will save less than 365 kWh of electricity a year. At $0.01 / kWh, that is $36.50 per year. You are not going to recover the cost of an L2 charger based on electricity savings alone, unless your electric rates are very high. Plus TIME to charge... Having my car in the hot sun at work 5 hours vs. < 2.5... worth it there (ok, it's almost free at work), but at home, it's nice to know the car is ready after 2 hours and not 5. Edited September 7, 2014 at 04:25 PM by shaggy314 Quote Link to comment Share on other sites More sharing options...
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