EV Off-Peak Charging Savings

Quantify how much cheaper your home charging bill gets when you schedule sessions in off-peak windows. Provide peak and off-peak rates; the calculator applies a default 300 kWh monthly charging need that you can adjust to match your driving pattern.

On-peak price you would pay without shifting charge time.
Discounted time-of-use price you can charge at.
Defaults to 300 kWh per month at home.

Utility pricing varies; confirm your time-of-use rates and EV plan terms before relying on projected savings.

Examples

  • $0.32/kWh peak, $0.12/kWh off-peak, 300 kWh per month ⇒ Peak-cost bill: $96.00 USD • Off-peak bill: $36.00 USD • Monthly savings: $60.00 USD (62.50% cut) on 300 kWh.
  • $0.40/kWh peak, $0.18/kWh off-peak, default 300 kWh ⇒ Peak-cost bill: $120.00 USD • Off-peak bill: $54.00 USD • Monthly savings: $66.00 USD (55.00% cut) on 300 kWh.

FAQ

Can I use this for demand charges?

No. It focuses on per-kWh time-of-use pricing. If your utility adds demand charges, include their impact in the peak rate or run a separate demand calculation.

What if only part of my charging is off-peak?

Reduce the monthly kWh input to the portion you can schedule off-peak, or average an effective rate between peak and off-peak windows.

Does it account for charging losses?

No. The kWh input should already include charger and battery losses. Add 5–10% to your estimate if you only know the miles driven and vehicle efficiency.

How do I annualize the savings?

Multiply the monthly savings shown by 12 for a yearly view, or change the kWh input to your total expected annual home charging.

Additional Information

  • Result unit: U.S. dollars for peak and off-peak charging bills plus the savings and percentage reduction.
  • Defaults assume 300 kWh per month of home charging; adjust upward for long commutes or downward if most charging is public.
  • Savings scale linearly with both rate spread and charging volume, so even modest shifts add up over a year.

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