EV Charging Cost Calculator — 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.
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.
- Energy needed = 75 x 80% = 60 kWh to battery
- From wall (90% efficiency) = 60 / 0.90 = 66.7 kWh
- Cost = 66.7 x $0.14 = $9.33
- Monthly (8 charges) = $9.33 x 8 = $74.67