EV Time-of-Use Charging Savings
An EV's overnight charging pattern is a natural fit for a time-of-use rate plan, since most charging can happen during cheap off-peak hours with no change to your driving routine. This isolates that specific savings opportunity.
At your inputs, switching to off-peak charging pays back in 0.2 years and changes your annual cost by $220 a year.
| Net cost after confirmed incentives | $50 |
|---|---|
| Annual savings | $220 |
- This uses planning estimates you entered, not a contractor quote or guaranteed savings.
- Time-of-use savings depend on your utility's actual rate spread and charging during off-peak hours; weigh that uncertainty.
What this also tells you: If your annual savings are 20% higher or lower than entered, off-peak charging payback would move from 0.3 years to 0.2 years.
This is a planning estimate based on your entries. It does not size equipment, determine electrical or building-code compliance, verify incentive eligibility, or replace a contractor quote or professional energy audit.
Why this decision comes up
Time-of-use savings for EV charging are one of the easiest wins in this whole site, since the behavior change, charging overnight instead of immediately, usually costs nothing and requires no new equipment.
How this is calculated
This is a standard payback calculation: any setup cost divided by annual savings from shifting charging to off-peak hours.
A worked example
With the defaults ($50 setup cost, $620/year flat-rate charging dropping to $400/year off-peak), the annual savings is $220 and payback lands at 0.2 years, effectively immediate, reflecting how low-cost and high-value this specific change typically is.
Common mistakes
A common mistake is assuming a time-of-use plan change only affects EV charging. Check your plan's effect on your whole household's electricity use, not just the car.
Limitations
This does not model your household's non-EV electricity usage pattern, which affects whether a time-of-use plan is a net win overall.
Common questions
Do I need special equipment to charge off-peak?
Often not: many EVs and chargers let you schedule charging to start at a specific time through the car's own settings or the charger's app, which is enough to shift charging into off-peak hours.
Is switching to a time-of-use plan risky for the rest of my electricity use?
It depends on your household's overall usage pattern. If most of your other electricity use also happens during off-peak hours, a time-of-use plan can help broadly; if not, it could raise costs elsewhere. Consider your whole bill, not just EV charging.
How is this different from the rate plan comparison tool?
This tool shows a simple payback for the scheduling change itself. The rate plan comparison tool shows both plans' full total cost side by side.
What if my EV doesn't have a built-in scheduling feature?
Many Level 2 chargers themselves offer scheduling through their own app, independent of the vehicle. Check your charger's features if your car lacks this option.
Does this savings depend on how big my EV's battery is?
Yes, a bigger battery charging a larger amount of energy each session captures more absolute dollar savings from the same off-peak rate discount than a smaller battery would.