How fast does a Level 2 240V charger pay for itself?

For a typical commuter driving 12,000 to 15,000 miles per year, switching from public DC fast chargers ($0.35–$0.48/kWh) to home overnight charging ($0.09–$0.15/kWh) saves $600 to $900 annually—meaning a $400–$500 Level 2 unit pays for itself in 6 to 9 months.

VoltCost — EV Charging Cost & Gas Savings Calculator (All 50 States)

Q: Does rooftop solar really make EV driving free?

Once your solar array is amortized, the marginal cost of excess daytime solar kilowatt-hours fed directly into your vehicle is essentially $0.00. Paired with a smart EV charger, your vehicle runs purely on clean domestic sunlight.

⚡ Your Driving & Energy Profile

Location / State $0.158 / kWh

Annual Mileage 13,500 mi/yr

⚡ 1-Click Popular Matchups:

Electric Vehicle

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Home Electric Rate ($/kWh)

Gas Price ($/gal)

Charging Breakdown (% Off-Peak Night Rate) 80% Off-Peak

0% (Standard Peak) Off-peak rate: $0.089/kWh 100% Night

☀️ Rooftop Solar Offset Covers 50% of home charging at $0 marginal electricity cost

📊 Financial Impact

Estimated Annual Savings

+$1,142

That's $5,710 saved over 5 years

Monthly Fuel: EV

$38

$0.034 per mile

Monthly Fuel: Gas

$133

$0.118 per mile

Annual EV Electricity

$456

3,750 kWh/year

Annual Gas Spend

$1,598

482 gallons/year

EV Running Cost (28%) Cash Kept in Pocket (72%)

☀️

Slash EV Fuel Cost to $0 with Solar

Rooftop solar in California unlocks a 30% Federal Tax Credit + Net Metering.

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☀️ Zero-Dollar EV Fuel Strategy 📍 California Net Metering Active

🏛️ 30% Federal Tax Credit (IRS Form 5695)

Drive on Sunshine: Slash Your EV Fuel Cost to $0

Pairing your electric vehicle with rooftop solar eliminates your annual electric charging costs entirely. Compare pre-screened local installers in California to unlock wholesale equipment pricing and state clean energy rebates.

⚡

$0 / Mile Charging

Generate your own vehicle fuel on your roof for 25+ years.

💵

30% Federal Tax Credit

Save $6,000 to $9,000 directly off your federal tax liability (IRS Form 5695).

📈

Net Metering Protections

Spin your electric meter backwards when generating peak power.

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⚡ 2026 State Electricity Cost Rankings

Official Energy Information Administration (EIA) data ranked by residential cost per kilowatt-hour. Click any state to load it into the calculator.

🟢 5 Most Affordable States to Charge

🔴 5 Most Expensive States to Charge

Frequently Asked Questions

Real-world facts about electric vehicle ownership, electricity tariffs, and home battery charging.

Charging an EV with an average 75 kWh battery from 10% to 80% at home in the United States costs between $6.50 and $14.00, depending on your state's electricity tariff. Under super-off-peak time-of-use (TOU) rates, this can drop below $5.00 per full charge.

Yes. Many major utilities (like PG&E, ConEd, Georgia Power, and Duke Energy) offer special EV Time-of-Use rates where electricity between 11 PM and 6 AM is 40% to 65% cheaper than daytime peak hours. Most modern EVs allow you to schedule charging automatically from your smartphone.

Once your solar array is paid off or amortized, the marginal cost of excess daytime solar kilowatt-hours fed directly into your vehicle is essentially $0.00. Paired with a smart EV charger that supports solar diversion, your vehicle runs purely on clean domestic sunlight.

For a typical commuter driving 12,000 to 15,000 miles per year, switching from public DC fast chargers (which average $0.35–$0.48/kWh) to home overnight charging ($0.09–$0.15/kWh) saves $600 to $900 annually—meaning a $400–$500 Level 2 unit pays for itself in 6 to 9 months.