Electric vehicles are becoming increasingly common in California, and most EV owners charge their vehicles at home. Home charging is convenient and usually much cheaper than public charging, but electricity prices can vary depending on when charging takes place.

Many California households are on time-of-use electricity plans, which means electricity costs more during certain hours of the day. For EV owners, understanding how these pricing structures work can make a noticeable difference in monthly energy costs.

With the right charging schedule, homeowners can often reduce the cost of driving an electric vehicle without changing their daily routine.

Why charging time matters

Electric vehicles require a large amount of electricity compared with most other appliances in the home. Charging a vehicle battery can add a significant amount of electricity usage to a household’s monthly bill.

Because time-of-use pricing charges higher rates during peak hours, charging during those periods can increase the cost of operating an EV.

Charging during lower-cost hours can make electricity significantly cheaper.

This means that when you charge your vehicle is often more important than how often you charge it.

Typical peak and off-peak periods

While exact schedules vary by utility provider, many time-of-use plans follow a similar structure.

Off-peak hours

These usually occur overnight and early in the morning when electricity demand is lowest. Electricity prices are typically the lowest during this time.

Mid-peak hours

Mid-peak periods fall between off-peak and peak demand times. Prices are moderate.

Peak hours

Peak hours usually occur in the late afternoon and early evening, when electricity demand increases as people return home and begin using appliances and air conditioning.

Charging during peak periods can significantly increase electricity costs.

The best time to charge an EV at home

For many households, the most cost-effective charging window is overnight.

Charging late at night or early in the morning typically allows the vehicle to use electricity when rates are lowest and grid demand is reduced.

Most electric vehicles and home charging systems allow drivers to schedule charging automatically. This means the vehicle can be plugged in when convenient but begin charging later during the lowest-cost hours.

Automated charging schedules make it possible to minimize electricity costs without changing daily habits.

Charging during the day with solar

Homes with rooftop solar panels may benefit from charging an EV during daylight hours.

Solar panels typically produce the most electricity around midday. Charging during these hours can allow a household to use its own solar energy instead of purchasing electricity from the grid.

This approach works particularly well for homeowners who work from home or who have flexible daytime schedules.

However, the exact benefit depends on the household’s solar production and electricity rate structure.

Common peak-rate charging mistakes

Many new EV owners unintentionally charge during the most expensive hours of the day.

Some common examples include:

• Plugging in immediately after arriving home in the evening

• Charging during peak air-conditioning hours

• Running multiple high-energy appliances at the same time as EV charging

• Forgetting to enable scheduled charging in the vehicle settings

These patterns can cause electricity usage to spike during peak periods, increasing monthly energy costs.

Understanding charging power levels

Home EV charging typically occurs at two main levels.

Level 1 charging

Level 1 uses a standard household outlet. It charges slowly but can be sufficient for drivers with short daily commutes.

Level 2 charging

Level 2 charging uses a dedicated 240-volt circuit and charges vehicles much faster. This is the most common home charging setup for EV owners.

Because Level 2 chargers deliver much more electricity in a shorter time, scheduling charging during lower-cost hours becomes especially important.

Managing EV charging with other home energy use

EV charging often becomes one of the largest electricity uses in a home. Managing how it interacts with other appliances can help keep electricity costs predictable.

Some households choose to avoid running high-energy appliances at the same time as EV charging. Others rely on smart home energy systems that automatically balance different loads.

As electric vehicles become more common, coordinating charging schedules with household energy usage will likely become an increasingly important part of home energy management.

The bigger picture

Electric vehicles can significantly reduce gasoline use and lower overall transportation emissions. However, they also add new electricity demand to the home.

By understanding how time-of-use pricing works and scheduling charging during lower-cost periods, homeowners can keep EV charging affordable while maintaining the convenience of charging at home.