电动车充电费用计算器
计算电动汽车在家或公共充电桩的充电费用。
Cost Per Charge
$9.33
Cost Per Charge vs Electricity Rate
公式
How EV Charging Costs Work
The cost to charge depends on battery capacity, how much charge you add, your electricity rate, and charger efficiency.
Formula
kWh From Wall = Battery kWh x Charge % / Charger Efficiency
Cost = kWh x Electricity Rate
Level 2 home chargers are typically 85-95% efficient.
计算示例
75 kWh battery, charging 80%, $0.14/kWh, 90% efficiency.
- 01Energy needed = 75 x 80% = 60 kWh to battery
- 02From wall (90% efficiency) = 60 / 0.90 = 66.7 kWh
- 03Cost = 66.7 x $0.14 = $9.33
- 04Monthly (8 charges) = $9.33 x 8 = $74.67
常见问题
Is it cheaper to charge at home or public stations?
Home charging is typically 50-75% cheaper than public DC fast charging. Home rates average $0.10-$0.20/kWh vs $0.30-$0.60/kWh at public stations.
How long does home charging take?
Level 1 (standard outlet): 24-48 hours for a full charge. Level 2 (240V): 6-12 hours. DC fast charging: 30-60 minutes to 80%.
How does EV cost compare to gas?
At $0.14/kWh, an EV costs about $0.04/mile vs $0.12/mile for a 30 MPG car at $3.50/gallon. EVs are roughly 3x cheaper per mile.
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