Electricity bill - Hyundai Ioniq Forum
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post #1 of 17 (permalink) Old 09-01-18, 10:34 PM Thread Starter
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Electricity bill

Hi guys,

Do you guys see big jump in your electric bill after owning the ev?

Excuse my ignorance, wondering if someone can help me understand how to calculate how much does it cost to charge the car from home using regular 120 v outlet and how much would it be using level 2?

Thanks

Last edited by MikeC; 09-01-18 at 10:35 PM. Reason: Typo
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post #2 of 17 (permalink) Old 09-01-18, 10:40 PM
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The level of charging should not mean much, when charging from the grid, unless you have some kW consumption related, progressive, cost plan. You usually pay a fixed price per kWh (energy), plus some fixed cost per time period of grid accessibility.

Multiply the price per kWh with the battery capacity in kWh, and you have the cost of a full charge-up.
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Regards, Knut, driving a 2017 Marina Blue Ioniq Plug-in Premium SE
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post #3 of 17 (permalink) Old 09-01-18, 11:03 PM
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I have the level 2 chargepoint with the monitoring app.

Adding 159km to the car used 22 kWh of energy. I pay .0448 / kWh. So this cost me about one dollar.

In my suv I get about 450km to a tank of gas which costs me about 75$.
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post #4 of 17 (permalink) Old 09-01-18, 11:15 PM
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I am also in Ontario and I have worked it out to around $2 to "fill the tank" at overnight charging rates.

I have a short commute (32km round trip), but we have also migrated almost all of our errand and weekend driving to the Ionic and I would estimate it's costing us around $20 a month.

In 3 months we have saved probably close to $350+ in gas already!

The only problem is that I'm driving the Ioniq so much my ICE car battery died from sitting in the extreme cold for several weeks.
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post #5 of 17 (permalink) Old 09-01-18, 11:25 PM Thread Starter
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Quote:
Originally Posted by Ioniq-Future View Post
I am also in Ontario and I have worked it out to around $2 to "fill the tank" at overnight charging rates.

I have a short commute (32km round trip), but we have also migrated almost all of our errand and weekend driving to the Ionic and I would estimate it's costing us around $20 a month.

In 3 months we have saved probably close to $350+ in gas already!

The only problem is that I'm driving the Ioniq so much my ICE car battery died from sitting in the extreme cold for several weeks.
I have signed up the APP overnight plan. The rate is 2 cent/kwh from midnight to 6 am. It is less than a dollar for me to charge the car :P
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post #6 of 17 (permalink) Old 10-01-18, 02:31 AM
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Same here, we usually have two rates. The nightly rate is about 2 eurocents cheaper than the daily rate. I am getting solar panels soon (12 X 275wp), but they will likely not offset my daily commute of about 130km in electricity consumption.
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post #7 of 17 (permalink) Old 10-01-18, 09:48 AM
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Well, you'll use between 14 and 16 kwh/100km (mostly highway driving) depending on weather. Where I am, its 6 cents/kwh off peak and 5 cents/kwh for delivery. Or it was before the province forced the price cut on power, haven't recalculated lately. So, if you drive 100km a day, figure about 1.76 for that amount of power per day, plus a bit for charging efficiency losses, so lets say about $2 a day.
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post #8 of 17 (permalink) Old 10-01-18, 09:51 AM
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I calculate by looking at the percentage of battery used. In warmer weather, I averaged charging 20% (or 5.6kW) of the battery a day. During the coldest weather (the past 2 weeks), I charge 40% (or 11.2kW). I used $0.09 per kW after you factor in the grid delivery fee and assumed 20% losses.

The math comes out to $0.57 for me to charge during warmer weather and $1.14 during the coldest weather. if I assumed driving the car 25 days of the month, that's about $14.28/$28.56 for about 1200km. Not bad!
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post #9 of 17 (permalink) Old 10-01-18, 10:44 AM
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Electricity is billed by kWh (kilowatt * hour), an unit of energy. A kW is a thousand watts, an unit of power. It's akin to km and km/h. They are not the same.

Charging overnight at 120V * 15A for say, 12 hours is (using very simplistic equations) around 22kWh (volts times amps gives you watts, divided by 1000 gives you kilowatts, times hours gives you kWh). Multiply that by whatever your electricity provider bills you per kWh and you get the nightly charging cost.

For Ontario for example, it's 6.5 cents per kWh, which means it costs $1.43 per night. A more realistic figure is probably around $2 to account for all the losses through wiring and resistive heat. If you charge 12 hours per night every day for a 30 day period, that comes out to $60 per month, around $720 per year.

Though if you based that off the rated range and battery capacity of the Ioniq, that's 22/28 * 200km = 157km a day, which means 57,357km annually. That's about 2.5 times the average annual driving an average North American does.

So if you drive about 22,000km a year and charge at home exclusively, it will cost you about $290 a year.

It costs me about $100 a year even though I do upwards of 28,000km because a) I do only 110kph on the highway and b) I get free charging at work.
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post #10 of 17 (permalink) Old 10-01-18, 11:20 AM
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Quote:
Originally Posted by sth128 View Post
Electricity is billed by kWh (kilowatt * hour), an unit of energy. A kW is a thousand watts, an unit of power. It's akin to km and km/h. They are not the same.
Thanks for pointing this out and explaining very well.

When people are mixing these sizes and their units, it's hard to respond friendly without starting out like a school teacher with red ink.

Just repeating, and this is the international, or "metric" system (SI):
Power is measured in watts, and the symbol is a capital W, 1000 W = 1 kW.
Energy or work (equivalent or proportional physical thing, usually), which can be seen as power * time, is measured in kWh (k and h should be lowercase), or other units like joule (J) or newton meter (Nm) are sometimes used, but not in this context.

You use power, for some time, and pay for that energy used. A battery has a capacity in kWh and can be charged with a power in kW. The power is basically electric current in amps (A) times the potential in volts (V). In this way the power can be compared between electric systems with different potential, 120 V versus 230 V. 120 V requires about twice the current (amps) to be delivered to get the same power as 230 V systems and so on.

Regards, Knut, driving a 2017 Marina Blue Ioniq Plug-in Premium SE
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