TIME-OF-USE (TOU)
PEAK PERIODS ARE
CHANGING.

Starting in March 2019 (pending CPUC approval), your TOU periods are changing. This means you can lower your costs by shifting more of your energy use away from these times:

  • Standard Business TOU On-Peak periods will be 4 p.m. to 9 p.m., instead of noon to 6 p.m.
  • Optional TOU peak periods for Agriculture & Pumping will be 5 p.m. to 8 p.m.

Why are TOU periods changing?

As California continues to adopt cleaner resources to generate energy, the cost to deliver power throughout the day is changing. Energy is now less costly during midday and more costly in the late afternoon and evening. That’s why TOU peak periods are shifting to these times of day.

Ready for Critical Peak Pricing (CPP)?

In March 2019 (pending CPUC approval), all businesses with service accounts under 200 kW and agricultural and pumping service accounts over 200 kW will default to Critical Peak Pricing (CPP). CPP is a demand response program that offers a discount on regular summer electricity rates in exchange for higher peak period prices during 12 “CPP events” per year between 4 p.m. and 9 p.m. If your business is able to reduce its energy use away from CPP events, you can lower your overall costs.

Learn more about CPP

New Time-Of-Use Periods

June 1 to September 30
(4 months)

Standard Business TOU Periods
Weekdays
Business TOU rates starting March 2019 (pending CPUC approval). Summer weekdays: 4pm–9pm=On-Peak, 9pm–4pm=Off-Peak. Summer weekends and holidays: 4pm–9pm=Mid-Peak, 9pm–4pm=Off-Peak.
Weekends & Holidays
Optional TOU Periods available for Agricultural & Pumping
Weekdays
Agriculture & Pumping Optional TOU rates starting March 2019 (pending CPUC approval). Summer weekdays: 5pm–8pm=On-Peak, 8pm–5pm=Off-Peak. Summer weekends and holidays: 5pm–8pm=Mid-Peak, 8pm–5pm=Off-Peak.
Weekends & Holidays
  • Off-Peak
  • Mid-Peak
  • On-Peak

October 1 to May 31
(8 months)

Standard Business TOU Periods
Weekdays
Business TOU rates starting March 2019 (pending CPUC approval). Winter weekdays, weekends, and holidays: 8am-4pm=Super Off-Peak, 4pm–9pm=Mid-Peak, 9pm–8am=Off-Peak.
Weekends & Holidays
Optional TOU Periods available for Agricultural & Pumping
Weekdays
Agriculture & Pumping Optional TOU rates starting March 2019 (pending CPUC approval). Winter weekdays, weekends, and holidays: 8am-5pm=Super Off-Peak, 5pm–8pm=Mid-Peak, 8pm–8am=Off-Peak.
Weekends & Holidays
  • Super Off-Peak
  • Off-Peak
  • Mid-Peak
  • On-Peak

Helpful Tools and Resources

Compare Rate Options

See how the new TOU peak periods will affect you. Our Rate Plan Comparison Tool will help you compare rates based on your actual usage.

Compare your rate options

Business Energy Advisor

Take a 5-minute survey about your facility and get customized recommendations for cost-effective, energy-efficient upgrades and strategies.

Get started with Energy Advisor

Get the facts about TOU.

Our helpful fact sheet summarizes the upcoming changes to TOU. Find answers to frequently asked questions and energy-efficiency tips.

Download the TOU Fact Sheet

Tips to Lower Your Bills with TOU

  • Run ice machines at night and into the early afternoon to build up a large supply.
  • Turn off all office equipment and lights every night and weekend; if you can’t turn off computers, turn off monitors and the printers.
  • Always use night covers on refrigerated display cases.
  • Do laundry and waste-processing tasks before or after On-Peak hours.
  • Charge battery-powered equipment before or after On-Peak hours.
  • Precool your workspace by lowering the thermostat in the morning, then turn it up during On-Peak hours.

Inside Edison: Craft Brewery Taps Into Electricity

Electric Brewing Co. in Murrieta uses SCE Time-Of-Use and Off-Peak periods to implement successful business strategy.

Read more
A man in a tee-shirt that reads "electric" checks large vats in a brewery.

What is Time-Of-Use?

Our Time-Of-Use rates are part of a statewide initiative designed to keep the electric grid reliable—even when energy resources are in high demand.

All rates feature energy charges that vary based on the time of day, the day of the week, and the season. Most rates also include demand charges that are based on the maximum amount of electricity your business uses at once and during certain times of the day.

Common TOU Questions

TOU rates better align the cost of electricity to the time it is produced and the cost to deliver it when your business needs it. Pricing will generally be higher during summer weekdays in the late afternoons and evenings.

You can help lower your costs by shifting energy use from the more expensive On-Peak hours to the Mid-Peak, Off-Peak, and Super Off-Peak hours of the day when TOU pricing is lower.

Customers with behind‐the‐meter (BTM) solar generating facilities may be eligible to be served on TOU rates that retain legacy TOU periods for 10 years from the date their systems were authorized to operate. To qualify for TOU period grandfathering, you must meet the following eligibility criteria:

  • Your initial solar interconnection application must have been submitted by January 31, 2017. This deadline was extended for public agency customers to December 31, 2017.
  • Your solar generating facility must be sized to offset at least 15% of your annual load.

One way to understand demand charges is to consider an example—imagine a single light bulb running for 10 hours. Now imagine 10 light bulbs running at once for 1 hour. Both situations use the same amount of electricity, but running 10 light bulbs at once increases the load demand on the electricity grid. This makes it more expensive for us to maintain the supply of energy. In some rate plans, your business can incur costs for the extra demand.

Demand charges are based on the highest amount of electricity used within any 15-minute period during your monthly period (referred to as “Facilities-Related Demand”) and/or on your highest amount of electricity used within a specific TOU period during your monthly billing period (referred to as “Time-Related Demand”). The unit of measurement used is kilowatts (kW). Energy charges are based on the total amount of electricity used in each TOU period within a billing cycle. For energy usage charges, the unit of measurement is the kilowatt hour (kWh).

Learn more about Time-Of-Use Charges

Facilities-Related Demand Charges apply year-round and are calculated per kilowatt (kW) according to the highest recorded demand during each monthly billing period, regardless of season, day of week, or time of day.

Time-Related Demand Charges apply year-round and are calculated per kilowatt (kW) according to the highest recorded demand during On-Peak and Mid-Peak hours, non-holiday weekdays. On-Peak TRD charges apply during the summer and Mid-Peak TRD charges apply during the winter.