How to Use Time-of-Use Rates to Charge Your EV Off-Peak

What time-of-use rates are

A time-of-use rate charges different prices for electricity depending on when you use it. Instead of one flat price per kilowatt-hour (kWh) all day, the day is divided into pricing periods that reflect how much demand is on the grid.

Most TOU plans use some version of these periods:

The exact hours, seasons, and price gaps are set by your utility and approved by your state regulator, so they differ widely from one area to the next. Always use the schedule printed on your own utility's plan page or bill, not a general rule of thumb.

• Off-peak: the lowest price, typically overnight and sometimes midday on weekends.
• Mid-peak or shoulder: a middle price, offered by some utilities as a buffer around the peak.
• On-peak: the highest price, usually late afternoon to evening when households are cooking, running AC, and using lights and appliances.

Why TOU rates suit EV charging so well

A Level 2 home charger can add a meaningful amount of range in a few hours, and a car rarely needs to be charged at a specific moment. That flexibility is exactly what TOU pricing rewards.

Charging is also one of the largest flexible loads in a household. If your car draws power during the on-peak window, you pay the highest rate for a big block of energy. If the same energy flows at 11 p.m. or later (or whatever your off-peak window is), the same miles cost less.

There is a wider benefit too. Moving large loads away from peak hours eases strain on the grid, which is one reason many utilities offer special EV rate plans in the first place.

Step 1: Find your utility's rate options

Start by checking what your utility actually offers. Many have more than one choice:

Look for the off-peak hours, the on-peak hours, any seasonal changes, weekend or holiday rules, and any fixed monthly fees tied to the plan. Your utility's website or customer service line can confirm what is available at your address.

• A whole-home TOU plan that applies to all the electricity you use.
• A dedicated EV rate, sometimes with a deeper overnight discount.
• A separate meter or sub-meter option that prices only EV charging, offered by some utilities.

Step 2: Decide whether TOU is right for your household

TOU plans save the most when you can shift a good share of your usage away from on-peak hours. They can cost more if most of your electricity use happens in the expensive window.

A quick self-check:

If you want a real answer, compare a few months of your bill and usage data against the TOU rate. Many utilities provide hourly usage data online or bill-comparison tools that do this for you. We do not quote savings figures here because they depend entirely on your rates and habits.

• Is your car home and plugged in most nights?
• Can you run the dishwasher, laundry, and other flexible loads outside the peak window?
• Does someone work from home and run heating or cooling heavily in the late afternoon?
• Does the plan's on-peak price go up significantly compared with your current flat rate?

Step 3: Schedule charging so it happens off-peak

Once you are on a TOU plan, you have three common ways to control when charging happens. You can use more than one.

Most modern EVs let you set a departure time or a charging window. Set the window to begin when your off-peak period starts and the car handles the rest. Many vehicles also let you save a different schedule for home than for other places.

Some home chargers have their own app and timer. Scheduling at the charger is useful if you drive more than one EV or if your vehicle's own scheduling is limited. Charger-level scheduling keeps working even if you swap vehicles.

Some utilities offer smart-charging programs that automatically move charging into low-cost hours, sometimes in exchange for a bill credit. Availability depends on your utility and the car or charger you own.

Whichever method you choose, test it. Plug in on a normal evening, then check the next morning that charging started when you expected and the car is ready when you leave.

Handle the edge cases

A good routine has a plan for the exceptions:

• Need a charge now: most apps have a one-time override or a Charge Now option. Use it sparingly, since on-peak charging is the costliest.
• Seasonal changes: some plans shift the peak window between summer and winter. Review your schedule when the season changes.
• Daylight saving time: check that your scheduled start time still lines up with your off-peak window.
• Public charging: TOU pricing applies at home. Public stations have their own pricing, so do not assume the same logic.
• Battery limits: many owners charge to a daily limit instead of 100 percent for routine driving, and keep a full charge for road trips. Your vehicle's manual explains what it recommends.

How your home electrical setup affects TOU charging

Plugging into a standard outlet works but adds range slowly, which can make it hard to finish charging inside a short off-peak window. A dedicated 240-volt Level 2 circuit and charger gives you much more range per hour, so you can fit a full overnight refill into a tighter window.

What your home can support depends on your panel capacity, available breaker space, the wiring distance from the panel to the charger, and local permit requirements. A licensed electrician evaluates those factors and sizes the circuit and charger accordingly. In some homes a panel upgrade or a load-management device is part of the solution.

Homes with solar or a home battery have another option, since stored energy can offset on-peak usage. Whether that makes sense depends on your rate plan and system design, and a qualified installer can walk through it with you.

Get your charger installed by a licensed pro

Charge Home Solutions is a nationwide, Tesla-certified installation network. Our licensed and insured electricians install home EV chargers, Powerwall batteries, and related electrical upgrades, and we match you with a qualified installer quickly. Whether you drive a Tesla or another EV, we can assess your panel, recommend a charger that supports scheduling, and complete the installation properly.

Book a free in-home estimate at chargehomesolutions.com/request-service or call 888-995-6044.