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I have had my Bolt for about 2.5 months now. I have put on 6500 miles, which puts me right on track for my 30k miles/yr expectation.
My vehicle, via the never reset trip meter, reports 2.5 mi/kwh average. That equates to 2600kwh. During that time, we had multiple days of -30F and a high of +40F. I would estimate the average has been ~+10F.
My charger also reports its lifetime kwh and it is at 1400kwh. I was a week or two late to get it installed, so I would guess lifetime electric for this car is more like 1600kwh from my pocket. The rest of my charging is free public chargers, near work and class.
I'm on a TOU plan with my electric provider. Offpeak is $0.049/kwh, with on and critical being higher. Last month my blended car rate was $0.055/kwh. So, I've spent $88 to go 6500 miles, or $0.0135/mile or $135/10k miles.

I have been charging to a certain percent at home, generally 85 or 90, and to 100% while away. Now that temperatures are coming up and range with it, I will be able to reduce my home charging while relying more on the charger near work. I expect that out of pocket costs to dip under $0.01/mile for me.

Even if I had no away charging, I still would have paid only $0.022/mile or $220/10k miles.
Compare that to a Prius getting 46mpg @ $2.30/gal, would be $0.5/mile or $500/10k miles.

Even though my performance numbers are likely near the worst compared to the rest of you, my awesome electric rate makes up for a lot of cost. At the current rates, I'm saving over $100/month parking the Prius. That is a powerful statement of not just the effectiveness of electric cars, but the value of Time of Use Plans.

For anyone who wants more numbers, last month we used 1137kwh charging both cars (Bolt + Volt), the geothermal heat pump drew 1980 kwh, and the rest of the house 790kwh.
 

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Nice numbers. That's about the cost per mile I came up with for my Prius Plug-in with EV vs gasoline cost. 2 cents per mile EV, and 6 cents per mile gas. I'm more like 10 cents per mile in my 30 MPG Acura.

Off peak of 5 cents per kWh is very low (in Vancouver WA I pay 8 cents flat). I wonder if it pencils out to install a battery system that charges off-peak, and supplies energy the rest of the day?
 

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My vehicle, via the never reset trip meter, reports 2.5 mi/kwh average.
I have had my Bolt about the same amount of time a you. Am surprised that you don't reset your trip meter. I like being able to compare efficiency trip by trip. Plus, I am able to obtain the "Lifetime Efficiency" from the My Chevrolet App. That feature may require subscribing to OnStar once the trial period expires.
 

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Nice numbers. That's about the cost per mile I came up with for my Prius Plug-in with EV vs gasoline cost. 2 cents per mile EV, and 6 cents per mile gas. I'm more like 10 cents per mile in my 30 MPG Acura.

Off peak of 5 cents per kWh is very low (in Vancouver WA I pay 8 cents flat). I wonder if it pencils out to install a battery system that charges off-peak, and supplies energy the rest of the day?

Residential battery energy storage systems in the US are not allowed to charge from the grid during off-peak hours in order to discharge during on-peak hours. Twenty years ago, one could do this, but not any more. Interestingly, you *are* allowed to do this in Australia. Tesla sells a *lot* of Powerwalls in Australia.
 

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That seems like a truly dumb restriction. Isn't the whole point of Time Of Use pricing to incentivize people to shift their load from peak hours to non-peak hours?

Yup. Except that the utilities don't want you using their power to do it. You can charge from PV all you want.

In the late '90s, SCE wasn't paying attention to PV with battery backup. Several PV users with batteries were charging their batteries on Super Off Peak ($.04/kWh) at night and discharging them to the grid (along with excess PV production) at Peak ($.32/kWh) during the day. I knew a guy (Bill Korthoff, may he RIP) who paid off his system in about two years doing this.

SCE has mucked with rates and times for TOU so much that it's not recognizable as anything more than a way to reduce the benefits of PV for consumers, and make sure that EVs aren't charged at exceptionally low rates either. SCE also gets the last say in how big your PV installation is. IIRC, 125% of historical average yearly consumption is the most residential PV production they'll allow, without special dispensation.

I just noticed that SCE's existing TOU rates are being sunsetted at the end of this month (February), so if you want to change to any of the current TOU rate structures, sign up now.


Residential rates increased this month, too.
 

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I have had my Bolt about the same amount of time a you. Am surprised that you don't reset your trip meter. I like being able to compare efficiency trip by trip. Plus, I am able to obtain the "Lifetime Efficiency" from the My Chevrolet App. That feature may require subscribing to OnStar once the trial period expires.
It does not.....I have not extended the OnStar trial subscription and I can get that data from the MyChevy app.

Dayle
 
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