Home charging cost
Charging a Kia EV9 in Washington
What it actually costs to charge at home on Washington's average residential electricity rate.
Home charging at a glance
Washington rate
$0.10/kWh
Full charge
~$9.98
230–305 miles
Cost per mile
~3.4¢
Yearly home-charging cost
Based on the Kia EV9’s efficiency (2.9 mi/kWh) at Washington's average residential rate. For comparison, a 30-mpg gas car at $3.50/gallon runs about 12¢/mile.
Home vs. public fast charging
Costs below are for a 10%–80% charge — the usable fast-charge window, about 70 kWh of the Kia EV9’s 99.8 kWh battery. That’s the range most owners actually use, since charging past 80% slows down sharply.
Home charging
~$6.99
10 → 80% · 3.4¢/mile
$0.10/kWh
Public fast charging
~$34.93
10 → 80% · 17.2¢/mile
~$0.50/kWh (DC fast)
Charging the Kia EV9 on public DC fast chargers costs roughly 5.0× more than at home — about $27.94 extra per 10→80% charge. Most owners charge at home and only use fast charging on road trips, so your real average lands much closer to the home number.
Level 1 vs. Level 2: can your outlet keep up?
The cost per kWh is the same either way. What changes is how fast the Kia EV9 recovers range while parked at home.
Level 1 · standard outlet
~3 mi/hour
120V · no installation needed
~11 hours to recover 40 miles of driving. A 10-hour overnight plug-in adds about 35 miles.
Level 2 · 240V circuit
~28 mi/hour
240V · uses the Kia EV9’s 9.6 kW onboard charger
~1 hour to recover 40 miles. A 10-hour overnight plug-in adds up to 278 miles.
If your daily driving stays under ~35 miles, a regular outlet may be all the Kia EV9 needs. Drive more than that, and Level 2 — or a workplace charger — becomes the difference between an EV that fits your life and one that doesn’t.
Does a Level 2 install pay for itself?
A home Level 2 setup — 240V circuit plus charger — typically runs $800–$1,800 installed. If the alternative is relying on public fast chargers, home charging the Kia EV9 in Washington saves about $137.93/month at 12,000 miles a year.
At a mid-range install cost of $1,300, that’s a payback of roughly 9 months — and every month after that is pure savings.
Winter in Washington
Washington averages about 3 months a year cold enough to cut EV efficiency — typically 15–25% in deep winter. Here’s what that does to the Kia EV9’s numbers at a 20% efficiency loss:
Cost per mile
~4.3¢vs. 3.4¢ in mild weather
Full-charge range
~232 mivs. ~289 mi
The cost bump is minor — a few dollars a month. The range cut matters more: if your daily driving is close to the Kia EV9’s limits, winter is when a marginal charging setup stops working.
Will a Kia EV9 actually work for your home in Washington?
Cost is one piece. The bigger question is whether your outlet and daily driving keep you covered without relying on public chargers. Answer 5 quick questions for a clear, personalized answer.
Check your EV readiness →Frequently asked questions
How much does it cost to charge a Kia EV9 at home in Washington?
At Washington's average residential rate of $0.10 per kWh, a full charge of the Kia EV9's 99.8 kWh battery costs about $9.98 — roughly 3.4 cents per mile.
What is the yearly cost to charge a Kia EV9 in Washington?
Driving 12,000 miles a year, home charging a Kia EV9 in Washington costs about $414 per year.
Can you charge a Kia EV9 on a regular outlet?
Yes. On a standard 120V outlet (Level 1), the Kia EV9 recovers about 3 miles of range per hour — roughly 35 miles overnight. A 240V Level 2 circuit charges about 8x faster.
Is it cheaper to charge a Kia EV9 at home or at a public fast charger?
Home charging in Washington costs about 3.4 cents per mile, while public DC fast charging runs about 17.2 cents per mile — roughly 5.0x more.
Kia EV9 charging cost in other locations
Other EVs in Washington
Electricity rate is the EIA state residential average. Charging cost assumes home (Level 1 or Level 2) charging; efficiency and battery figures from the EV guide. Rates last reviewed Q2 2026.