How Much Does It Cost to Charge a 1,000Wh Power Station?
Calculate the cost to recharge a 1kWh portable power station from the grid using state electricity prices and charger efficiency.
A nominal 1,000Wh power station stores about 1kWh, but a full refill normally requires more than 1kWh from the wall because charging is not perfectly efficient.
What matters
- At 90% efficiency, a 1kWh refill requires about 1.11kWh from the grid.
- Electricity price differences by state change the result materially in percentage terms.
- Partial charges should use only the percentage of capacity actually added.
- Time-of-use rates can matter more than statewide averages.
How to size it
- Convert 1,000Wh to 1.0kWh nominal capacity.
- Divide by charging efficiency.
- Multiply by your utility rate in dollars per kWh.
- Scale by the state-of-charge change if the battery is not empty.
At 18.16¢/kWh and 90% efficiency, a 0–100% refill costs about $0.20. Using the same assumptions, the state-average estimate is about $0.14 in North Dakota versus $0.51 in Hawaii.
Common buying mistakes
- Assuming one nominal kWh equals one grid kWh.
- Using advertised battery capacity as a utility-meter measurement.
- Ignoring off-peak or peak pricing.
For a 1kWh-class station, recharge cost is generally measured in cents, not dollars. Ownership economics are driven more by purchase price, cycle life and avoided alternative costs.
Use your actual tariff when possible
State averages are useful for comparison, but the best charging-cost estimate comes from your own cents-per-kWh rate, the percentage of battery being restored and a realistic charging-efficiency assumption.
Next step
Calculate your charging cost → or Compare recharge cost by state →.