How Time-of-Use Charging Can Cut Your EV Electricity Bill in Half

Real savings math: Charging 30 kWh daily at peak ($0.38/kWh) costs $11.40/day, or about $342/month. The same 30 kWh charged at off-peak ($0.11/kWh) costs $3.30/day, about $99/month. That is a difference of $243/month, or roughly $2,916 a year, enough to cover a $700 Level 2 charger and a $1,200 installation inside the first year for a high-mileage household.

Opting Into a TOU Plan

Call your utility's customer service line or check the rates section of your online account and ask specifically about "time-of-use" or "EV time-of-use" plans. Most utilities let you opt in for free, and some run the switch automatically once you register a Level 2 charger for a rebate. The transition usually takes one full billing cycle to appear on your statement, and many utilities allow a no-penalty opt-out within the first 90 days if the new schedule does not suit your household.

How to Schedule Charging Around the Rate Window

Once you are on a TOU plan, the savings only materialize if charging actually happens inside the off-peak window. There are two ways to enforce that:

Charger-based scheduling

Most networked Level 2 chargers (ChargePoint Home Flex, JuiceBox 40, Wallbox Pulsar Plus) let you set a start time and, in some cases, an end time directly in the manufacturer's app. The charger itself withholds power until the scheduled window begins, regardless of when you plug in. This is the more reliable method because the schedule lives on the hardware, not the vehicle's software.

Vehicle-based scheduling

Nearly every EV on sale today, from a Chevy Bolt to a Ford F-150 Lightning, has a built-in charge schedule or "departure time" feature accessible from the touchscreen or the automaker's app. The car delays charging until the scheduled window, then ramps to full amperage, often 32A to 48A depending on the onboard charger, until the battery reaches the target state of charge.

Verifying the schedule is working

After your first TOU billing cycle, compare the kWh billed at peak, mid-peak, and off-peak rates on the statement. If a meaningful share of your usage still lands in peak or mid-peak hours, the schedule is starting too early, adjust the start time later by 30-60 minutes and check again next cycle.

The Downside: Your Whole House Goes on TOU

Opting into a TOU plan does not just apply to the EV, it re-prices every kWh your house uses. If you run central air conditioning heavily during the 4pm to 9pm peak window on hot summer days, or run a pool pump, dryer, or oven during that same stretch, those costs rise along with the EV savings offset. Before switching, add up your household's typical peak-hour usage from a past bill, not just the EV load, to confirm the plan is a net win.

A Separate EV Meter Can Solve the Conflict

Some utilities offer a second, dedicated meter installed just for the EV circuit, typically $200-$500 for the meter and connection work on top of your normal charger installation cost. That second meter puts only the charging circuit on the TOU or EV-specific rate while the rest of the house stays on its existing flat or tiered rate. This avoids re-pricing your entire home's electricity and is worth asking your utility about if your household runs a lot of peak-hour load outside of EV charging.

Putting the Numbers Together

For a household driving 12,000 miles a year in a vehicle averaging 3.5 mi/kWh, annual consumption runs around 3,430 kWh. At a flat rate of $0.20/kWh that is roughly $686/year. Shifted entirely to a $0.11/kWh off-peak TOU rate, the same usage costs about $377/year, a savings of roughly $309/year just from rate arbitrage, before accounting for any EV-specific super off-peak tier that could push the savings higher. Higher-mileage households and multi-EV homes see proportionally larger savings because the kWh volume shifted is larger.

Annual Savings by Mileage

The gap between flat-rate and off-peak TOU pricing scales directly with how many kWh you shift, which means annual mileage is the biggest single driver of how much a TOU switch is worth. Using a $0.20/kWh flat rate against a $0.11/kWh off-peak rate and 3.5 mi/kWh efficiency:

Annual Miles	Annual kWh	Flat-Rate Cost	TOU Off-Peak Cost	Annual Savings
8,000	~2,285 kWh	$457	$251	$206
12,000	~3,430 kWh	$686	$377	$309
18,000	~5,145 kWh	$1,029	$566	$463
24,000 (2 EVs)	~6,860 kWh	$1,372	$755	$618

Two-EV households roughly double the kWh shifted, and therefore roughly double the annual savings, which is why multi-vehicle homes tend to see the fastest payback on switching to a TOU plan and on installing a networked Level 2 charger capable of scheduled starts. Households with a home battery or solar system can push savings further by charging from stored solar energy generated during the day instead of drawing off-peak grid power at all.

Want to see exactly how much TOU savings would mean for your specific driving habits and local rates? Use our Charging Cost Calculator to compare peak vs off-peak costs for your situation.