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Contribute to a smart energy future, help keep costs down for your community and benefit the environment. Plus, you'll earn a sign-up bonus of $50 and receive $25 annually! It's easy. Just sign up and let your qualifying smart thermostat do all the hard work.

Enroll My Emerson Sensi
About the program
About the program. The program's smart technology works in the background to learn your preferred temperature ranges and how your home uses energy based on factors like weather, your typical AC runtime, and how quickly or slowly the temperature changes in your home. During times of peak energy demand, the program uses this knowledge to help keep you comfortable while reducing your energy use. As a thank-you, the Ameren Missouri Peak Time Savings Program will reward you with a $50 sign-up bonus for participating and $25 annually.
Peak Time Rewards
Peak Time Savings Event. There may be a few days in the summer that create a heavier demand for energy. To ensure everyone's energy needs are met efficiently, we'll announce a Peak Time Savings Event to reduce demand where we can. These events pre-cool your home when energy demand is lowest and limit your air conditioning usage during the event. This helps you stay comfortable before, during and after the event, while conserving energy during those peak times. You'll always be notified when an event is scheduled.
Smart Home
Effortless Comfort and Control. Our smart technology will help you save energy during peak times while keeping you comfortable based on learned preferences. Rest assured that you can still adjust the temperature in your home at any time.
Make a Difference. The Ameren Missouri Peak Time Savings Program is an easy way to contribute to a smart energy future, reduce your carbon footprint and keep energy costs more affordable for everyone without ever lifting a finger!

Make a Difference

Earn $50 just for signing up!

Your thermostat already does a lot to keep you comfortable and conserve energy. But now Ameren Missouri Peak Time Savings Program is here to help your thermostat do even more. By understanding how your home uses energy, the weather in your area, and your unique comfort settings, Peak Time Savings uses its cutting-edge technology to make your smart thermostat even smarter. Peak Time Savings easily fits your lifestyle to help you save the most while still keeping you comfortable.

How it Works

  1. Make sure that your home's cooling system is operated by a qualifying WiFi-enabled smart thermostat. (See our FAQ page for a list of qualifying smart thermostats.) Don't have a smart thermostat? You can purchase one at the Ameren Missouri Online Store and install it.
  2. Complete the Peak Time Savings program enrollment form online. You may also call 1.877.215.5752 for additional questions.
  3. You will receive a confirmation email from the Peak Time Savings Program and then you are officially enrolled. You'll also receive $50 as a sign-up bonus within 4 weeks.
  4. On the rare occasions that demand on the electrical grid is exceedingly high - and only on Monday through Friday during the months of May through September - your smart thermostat will automatically adjust to circulate the already-cooled air in your home. These times are called 'events' and will only last a few hours before your smart thermostat adjusts back to your preprogrammed cooling settings.
  5. Within a month of the anniversary of your enrollment, you'll receive $25 in the form of a bill credit.

Participation Requirements

The requirements for participating in the Peak Time Savings program are as follows:

  • Customers must have Ameren Missouri residential electric service to participate.
  • Customers must have or purchase an eligible thermostat - ecobee3, ecobee3 lite, ecobee4 ecobee SmartThermostat with voice control, Google Nest Learning Thermostat (any generation), Nest Thermostat, Google Nest Thermostat E, Sensi Smart Thermostat, or Sensi Touch Smart Thermostat.
  • Any smart thermostat(s) participating in the program must be connected to Wi-Fi within the home.
  • Any smart thermostat(s) participating in the program must connect to and control a central air conditioner, air source heat pump, ground source heat pump or ductless system.
  • No more than 2 smart thermostats per household and all smart thermostats in the home must be from the same manufacturer and be participating in the program.
  • There can be no additional thermostats controlling the temperature within the home.
  • Ameren Missouri residential electric customers who have individual, dedicated HVAC systems with furnaces and/or central air conditioning (including air, single stage and ground source heat pumps as well as ductless systems) are eligible. Homes featuring only window A/C units as their cooling source, boiler or radiant systems, line voltage systems, multistage heat pumps or homes with HVAC systems that are shared between units or centrally controlled are not eligible to participate.
  • Net metering customers are not eligible.
  • Customer's account must not be in the Medical Equipment Registry.
  • Agreement to the program Terms and Conditions which can be found here.

Frequently Asked Questions


How do I sign up if I already have an Emerson - Sensi?
Visit here to enroll your existing Sensi thermostat.
I want to join Peak Time Savings, but I don't have an Emerson - Sensi. Where can I get one?
If you need to purchase a qualifying thermostat visit the Ameren Missouri Online Store.
How is this different from just having a smart thermostat?
The Peak Time Savings Program makes your smart thermostat even smarter. At times when electrical demand is exceedingly high, the Peak Time Savings program allows Ameren Missouri to proactively cool your home to keep you comfortable while lowering your energy usage when it matters most.
Does the program save money on my bill?
Check back for more information about daily energy efficiency optimization available to Sensi owners in Summer 2020.
What thermostats are eligible?
The following thermostats are eligible for the program: ecobee3, ecobee3 lite, ecobee4 ecobee SmartThermostat with voice control, Google Nest Learning Thermostat (any generation), Nest Thermostat, Google Nest Thermostat E, Sensi Smart Thermostat, or Sensi Touch Smart Thermostat.
What do I get for participating?
You will receive a one-time $50 sign-up bonus for enrolling your thermostat into the Peak Time Savings Program. Additionally, you will receive $25 each year you continue to participate in the Peak Time Savings Program. Each qualifying thermostat is limited to one $50 sign-up bonus, so if you purchase and enroll a new Sensi thermostat through the Ameren Missouri Online Store, you will receive the sign-up bonus as an instant rebate at time of purchase. Should you unenroll and decide to reenroll at a later date, you will be eligible to receive the annual incentive based on your new enrollment date, but cannot receive the sign-up bonus again.
When will I receive my incentive?
When you enroll your existing thermostat in the program, your sign-up bonus check will be received within 4 weeks of completed enrollment. In addition, for continued participation in the Peak Time Savings Program, the annual incentive will be received within 4 weeks of the anniversary of your enrollment.
Who do I contact if I have additional questions?
If you have questions or require assistance, then email the program at or simply call the Peak Time Savings Program at 1.877.215.5752.
I’m on a time of use (TOU) rate. Can I join the Peak Time Savings program?
Yes! Customers on TOU rates are encouraged to join the program. On days when a Peak Time Savings event is called, we reduce your electric consumption during hours where overall energy use is high, which typically align with TOU rate peak periods when electricity is more expensive.

If you’re on a TOU rate, you’re probably already trying to shift your energy use out of high-demand hours. With Peak Time Savings, the program will manage this energy shifting for you, cooling your home before high-demand hours start, then reducing your use during the more expensive hours.

Peak Time Savings Events

What is a Peak Time Savings event?
On certain days during the summer, the Peak Time Savings Program will run an event to save energy during high demand times. During these events, the Peak Time Savings Program will manage your cooling schedule to reduce the runtime of your HVAC system when there is the most demand for energy. To ensure your comfort, we cool your home in advance of a Peak Time Savings event when energy demand is low. By doing this, we can prepare your home for the Peak Time Savings event to keep it comfortable while your air conditioning is off during the Peak Time Savings event.
When could an event occur and how often?
Events can occur Monday through Friday in the months of May through September. Typically, events are called in the late afternoon. Up to 10 events can be called each summer. Peak Time Savings events can last up to four hours.
How do I know when an event is occurring?
The program will send an email to you let you know that an event is planned the same day as the event is scheduled. The program will also send an email letting you know when an event is beginning and ending.
Can I adjust my thermostat during Peak Time Savings Events?
The Peak Time Savings Program takes into consideration your comfort preferences and will always operate within a comfort band based on your thermostat settings to make sure you and your family stay comfortable throughout the event. The average indoor temperature typically increases around two degrees Fahrenheit.

If you wish to opt-out of the event and adjust your thermostat settings, then you can call the Peak Time Savings Program at 1.877.215.5752. Ameren Missouri reserves the right to remove participants from the Peak Time Savings Program or make the customer ineligible for the next annual incentive if they opt-out of three or more events in the year.

Daily Energy Efficiency Optimization

What is Peak Time Savings doing when it is optimizing on Energy Efficiency days?
Peak Time Savings uses the weather, the unique characteristics of your home, and your preferences to create a personalized thermostat schedule for the day that keeps you comfortable and helps you save. This may mean that you see some different setpoints on your Emerson Sensi.

When Peak Time Savings sees an opportunity to help you save even more, it may set your thermostat above or below your settings by just a few degrees. The goal is for this change to be small so that you stay comfortable.

If you become uncomfortable, the first step is to make sure your thermostat schedule is set to temperatures that you prefer. Setting your thermostat schedule will help us understand your preferences. You can change your schedule any time.

Contact Us
Do you have a question that's not covered in our FAQ? Complete and submit the form below or give us a call at 1.877.215.5752.
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