Critical Peak Pricing

Critical Peak Pricing (CPP) is an optional time-based rate with different electricity rates based on the time of day it’s used. Just like the Time-of-Day (5-8 p.m.) Rate, when you use electricity is just as important as the amount of electricity you use. 

CPP is designed to allow our customers to help reduce demand on the electric grid during times when energy demand is at its highest or there are emergency conditions with the power system.

When you enroll in an eligible program, you'll participate in our Critical Peak Pricing Rate. This rate is in addition to your current Time-of-Day (5-8 p.m.) Rate and gives you a discount on energy throughout the summer in exchange for higher prices during Peak Events. You'll be asked to reduce your energy usage during Peak Events. Participation in these events help conserve electricity when it’s needed most, taking pressure off of the electric grid.

This rate is part of our efforts to:

  • Reduce peak demand.
  • Avoid building new power plants.
  • Reduce the need to buy electricity from more expensive, less environmentally friendly sources.

All of this will help us reach our ambitious goal to eliminate 100% of greenhouse gas emissions from our electric supply by 2030.

Learn more about My Energy Optimizer® for thermostats, which uses the CPP Rate.

How CPP works

Customers on CPP receive a discount of $0.020 on Time-of-Day off-peak and mid-peak prices from June 1 to September 30. The peak price is the same as the Time-of-Day peak price.

During CPP Peak Events, an additional charge is added to the current time period’s price.

CPP Peak Events

CPP Peak Events can be called any time of the day during the summer months (June 1 through September 30), including weekends and holidays. Only one event can be called per day.

Events will last 1 to 4 hours with a maximum of 50 hours total per summer. Events may span more than one time-of-day period. For example, an event may start during the mid-peak time period and end during the peak time period.

We’ll notify participating customers a day in advance before a CPP event is called, though we may call the event with shorter notice during emergency situations.

CPP time periods and prices

The prices and time periods below are only for summer months (June - September). Customers on CPP will have the same Time-of-Day Rate time periods and prices during non-summer months (October - May). All prices are measured in kilowatt hour (kWh). 


Midnight – noon, Monday through Friday, all day on weekends and holidays
$0.1225 per kWh. This is a discount on the standard Time-of-Day off-peak price of $0.1425 per kWh.


Noon – 5 p.m. and 8 p.m. – midnight, Monday through Friday
$0.1767 per kWh. This is a discount on the standard Time-of-Day mid-peak price of $0.1967 per kWh.


5 p.m. – 8 p.m., Monday through Friday
$0.3462 per kWh

EV discount

Midnight – 6 a.m., every day, all year long, including weekends and holidays.
$0.1075 per kWh

CPP Peak Events

$0.5000 kWh + the price of the applicable time period when the event occurs.
(Example: Peak price of $0.3462 + CPP Peak Event price of $0.5000 for a total of $0.8462 kWh)