Is my math correct? Is it really this cheap to operate?

[kps713]

I have had my 2025 Lightning FLASH for a little over a year now and have a little over 17,000 miles on it. I decided to do a calculation of what it costs me per 100 miles to drive my truck. I live in the Phoenix metropolitan area and during the summer I average about 2.3 miles per KWh and in the winter I average a little over 2.6 miles per KWh. I decided to use 2.5 as an average for my calculations so I use about 40 KWH per 100 miles. I have a FCSP at home and charge exclusively at home except when I drive to LA or up to the mountains. My FCSP shows that I use between 7.1% and 7.5% more energy to charge my truck each time I charge. I decided to use 8% to be conservative which means to add 40 KWh to the truck I will use 43.2 KWh from the power company. I charge only at night starting at 10 PM and the rate I pay through my power company is 5.943 cents per KWh off-peak in the summer and 3.495 cents per KWh during super-off-peak hours (10 PM to 3 AM) in the winter. If my calculations are correct then the cost to drive 100 miles is $2.57 (43.2 * .05943) in the summer and $1.51 (43.2 * 0.3495) in the winter. Why would I ever spend money on gasoline again if my calculations are correct?

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[frautumn]

the rate I pay through my power company is 5.943 cents per KWh off-peak in the summer and 3.495 cents per KWh during super-off-peak hours (10 PM to 3 AM) in the winter

This is only the cost for the energy, not for the distribution. Check your electric bill, there are other (sometimes 5 or 6) charges (per KWhr) besides energy.

 

[Lightning Rod]

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[SpaceEVDriver]

The advertised cost per kWh on our utility plan is
Winter: $0.12351 off-peak, $0.03495 super off-peak, and $0.32543 peak
Summer: $0.12345 off-peak and $0.34396 peak

For us, last month’s effective rate was $0.15/kWh.

I believe Arizona requires the utility to give you the $/kWh effective rate. Find that on your bill and use that cost rather than the advertised rate.

 

[kps713]

This is only the cost for the energy, not for the distribution. Check your electric bill, there are other (sometimes 5 or 6) charges (per KWhr) besides energy.

Got it. Those additional charges add $.02690 per KWh to the calculation. That raises my summer cost to $3.72 per 100 miles and my winter cost to $2.67 per 100 miles. Still way better than ICE.

 

[B177y]

Why would I ever spend money on gasoline again if my calculations are correct?

 

[richguy82]

Jesus those are cheap rates! My super off peak is like 11 cents and last year our dear governor approved Duke Energy rate hikes of 3 cents per kWh to that across the board for all hours of the day as a “hurricane recovery” fee. Publicly traded utilities are an absolute scam. Our surrounding counties have municipal energy utilities that are significantly cheaper (and statistically more reliable). I put in solar before the end of 2025 because of this and STILL waiting on permission from the utility to operate them. It costs more, is slow to deal with, and is less reliable. This arrangement with Duke energy benefits no one but Duke (and probably the governor ). Sorry for the rant .

 

[TaxmanHog]

Got it. Those additional charges add $.02690 per KWh to the calculation. That raises my summer cost to $3.72 per 100 miles and my winter cost to $2.67 per 100 miles. Still way better than ICE.

Pure envy coming from a guy who is paying 35 cents a KWH in the cold north east winters ~1.1 MPK

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