When we “spring forward” for daylight savings time, we gain an extra hour of evening sunlight. That seasonal shift doesn’t just change our clocks — it can also affect your electricity use and your energy bill.
In California, most customers are on Time-of-Use (TOU) electricity rates, meaning the time of day you use power affects what you pay. Understanding how daylight saving time impacts peak hours can help you lower your monthly bill.
What Are Peak Hours in California?
In California, peak hours are typically 4–9 p.m. for customers on Time-of-Use plans. This is when electricity demand is highest. People are home from work and school, cooking dinner, adjusting thermostats, watching TV, and charging devices.
Because demand is higher, electricity costs more during these hours.
By comparison, off-peak hours — usually late at night, early morning, and often mid-day — have lower demand and lower rates.
What Is Time-of-Use (TOU)?
Time-of-Use (TOU) rates are a pricing structure where electricity prices vary depending on the time of day.
- Peak hours (4–9 p.m.) = higher rates
- Off-peak hours = lower rates
TOU rates are designed to encourage customers to shift electricity use to times when demand is lower and renewable energy, like solar power, is more widely available.
Why Do Electricity Rates Change by Time of Day?
Electricity must be produced the moment it’s used. During peak demand periods, grid operators may need to rely on more expensive power sources to meet customer needs. Higher peak pricing reflects those higher system costs.
Shifting usage outside peak hours helps reduce strain on the grid and can lower overall energy costs.
How to Lower Your Energy Bill During Daylight Saving Time
Daylight saving time creates a natural opportunity to adjust your routine and save money:
- Run your dishwasher and laundry after 9 p.m. or before 4 p.m.
- Pre-cool your home earlier in the day and reduce AC use during peak hours.
- Charge electric vehicles overnight when rates are lowest.
- Use natural evening light before turning on indoor lighting.
- Meal prep earlier in the day or use smaller appliances like microwaves or slow cookers during peak hours.
Small timing changes can make a noticeable difference on your electricity bill. This spring, take advantage of longer daylight hours and smarter energy habits to reduce costs and support a more reliable California grid.
