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Subaru Solterra EV Limited Edition
Electric Charge Cost Using DC Fast Charger

Subaru Solterra electric car limited edition published mileage range is 222 miles and published battery total power is 72.8 kwh therefore the EV average mileage per kwh is 3.05. The owner of Subaru EV use 350 kwh DC fast charger for 12 minutes that delivered 4.8 kwh and his credit card bill is $2.09. The EV owner work destination is about 45 miles from home, so for round trip he will need 90 miles. The owner EV remaining estimated driving mileage is showing 70 miles with AC turn on. He wanted to use the same 350 kwh DC fast charging station from Walmart that is closed to his home. How many minutes will be his wait time to get at least 90 miles of charging? Assumed directly proportional relationship. What will be his estimated credit card billing cost?

EPA formula is 33.7 kwh is the equivalent energy conversion of 1 gallon of gasoline. The average 2023 model gasoline fuel economy is about 28 mpg. Subaru Solterra EPA published 111 mpge city and 93 mpge for highway. The combined is 102 mpge.

Using electric vehicle battery charger connected to 240 V and 32 A maximum charging current the estimated power delivery is 240 V x 32 A = 7,680 VA assuming a power factor of 1.0 the active power in kW is 7,680 W. Expressing in kW it will be 7.7 kW. Solterra published battery total power to fully charge state is 72.8 kWh. Using the given DC fast battery charger supplied from 240 V with 32 A maximum charging current, what is the total estimated waiting time to fully charge condition? The answer is 72.8 kWH divided by 7.7 kW is equal to 9.45 hours. So expect about 9 hours and 30 minutes

Using DC fast charger for electric vehicle connected to 480 V and 52 A maximum charging current the estimated power delivery is 480 V x 52 A = 24,960 VA assuming a power factor of 1.0 the active power in kW is 24,960 W. Expressing in kW it will be 25 kW. Solterra published battery total power to fully charge state is 72.8 kWh. Using the given battery charger supplied from 480 V with 52 A maximum charging current, what is the total estimated waiting time to fully charge condition? The answer is 72.8 kWH divided by 25 kW is equal to 2.92 hours. So expect about 3 hours.

Solterra recharged warning light will turn on at around 40 miles. So if your actual travel destination from Google Map or Apple Map is showing 45 miles. If you are going to use a highway speed of 65 mph to 75 mph with A/C turn on, you need to add 30 miles to your destination mileage 45 + 30 = 75 miles to be in safe side. Then add 40 miles recharge warning lights. So your EV mileage dashboard should be showing at least 75 miles + 40 miles = 115 miles. Then you need to plan where to find DC fast charger to recharge your car. If your A/C is not turn on your mileage range will increase.

Make sure you charge your electric vehicle before the electric utility peak hour time (example of peak hour time 4 pm - 7 pm). If you charge your car before or after the peak hour, Then your charging cost will be less. Try to record your charging time and how much it will cost you.

actual cost per 12 minutes of charging
estimated charging cost

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