Buying & ownership tool

Time-of-Use EV Charging Savings Calculator

Estimate monthly and annual savings from shifting EV charging to an off-peak electricity rate.

Your estimate

Enter your numbers

Defaults are examples. Replace them with your vehicle, energy price, and driving information.

Estimated monthly savings

$19.00

Regular-rate monthly cost
$60.00
Time-of-use monthly cost
$41.00
Estimated annual savings
$228.00
Break-even off-peak share
16.7%

This models EV charging only, not how a time-of-use plan changes the cost of other household electricity use.

Methodology

How the estimate is calculated

Baseline cost applies the regular rate to all entered monthly charging energy.

The time-of-use scenario blends off-peak and regular charging according to the entered share, then adds any incremental monthly program fee.

Important assumptions

  • The calculator models EV charging energy only.
  • It does not model peak rates applied to the rest of the home, seasonal tariffs, taxes, or demand charges.

Common questions

What to know about this estimate

Why can a cheaper off-peak rate still cost more?

A monthly program fee—or an insufficient share of charging shifted off-peak—can outweigh the lower rate.

What does the break-even off-peak share mean?

It is the minimum share of entered EV charging that must move to the lower rate to offset the entered monthly fee.

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