how do i set up time of use on my ecobee premium to save money on electricity?

Diagnosis

The ecobee SmartThermostat Premium does not inherently know when your electricity is expensive or cheap; it requires a specific data handshake between your utility provider's rate structure and the ecobee eco+ software suite. Time of Use (TOU) is a billing method where electricity costs vary based on the time of day, typically featuring "Off-Peak," "Mid-Peak," and "On-Peak" windows. If this is not configured, your thermostat will maintain your comfort settings regardless of the cost, potentially costing you significantly more during peak summer or winter afternoons.

The root cause of setup failure is usually a mismatch between the utility's specific plan name and the ecobee database. To confirm you are eligible, look at your monthly utility statement for terms like "Time-of-Use," "Dynamic Pricing," or "Real-Time Pricing." If your bill shows a flat rate per kWh regardless of the hour, the TOU feature in the ecobee app will be functionally useless, as there are no price fluctuations for the algorithm to optimize against.

How to Fix It

To activate Time of Use optimization on your SmartThermostat Premium, follow these precise steps using the ecobee mobile app, as the on-device interface is too limited for detailed rate entry.

1. Open the ecobee app and select your SmartThermostat Premium from the home screen.
2. Tap the eco+ icon (the leaf symbol) located in the main menu.
3. Locate the Time of Use toggle and slide it to the ON position.
4. The app will prompt you to select your utility provider. Use the search bar to type the exact name of your electric company (e.g., "Southern California Edison" or "Con Edison").
5. From the dropdown list, select your specific rate plan. If you see multiple options like "TOU-D-Prime" or "TOU-Standard," refer to the exact plan code listed on the "Rate" section of your utility bill.
6. Once the plan is selected, the app will automatically populate the peak and off-peak hours. Review these windows to ensure they align with your current billing cycle.
7. Enable "Optimize". This allows the thermostat to "precool" or "preheat" your home just before the peak window begins, then allow the temperature to drift slightly during the most expensive hours to avoid high-cost energy spikes.
8. Tap Save and return to the main screen. You will now see the eco+ leaf on the display when the device is actively saving money based on your TOU schedule.

If That Didn't Work

• Manual Plan Entry: If your specific utility or niche rate plan does not appear in the ecobee database, you cannot manually enter hours. You must contact ecobee support via the app to request a plan update for your region, or check if your utility offers a "Direct Connect" or "Demand Response" program that integrates automatically.
• Check for Conflicting Schedules: If the thermostat isn't shifting temperatures during peak hours, check your standard "Comfort Settings." If you have a "Sleep" or "Home" setting with a very tight temperature tolerance (e.g., 72°F with no variance), the TOU optimization may be overridden by your manual preference. Loosen your temperature offsets by 2-3 degrees.
• Verify Zip Code Accuracy: The TOU database is tied to your registered zip code. Go to Account Settings and ensure your home address is exact. An incorrect zip code will prevent the app from displaying the correct utility providers for your local grid.
• Update Firmware: Ensure your SmartThermostat Premium is running the latest firmware. Navigate to Main Menu > Settings > About. If a software update is pending, the eco+ features may glitch or fail to sync with the cloud servers.

Heads Up

• Pre-cooling Impact: Be aware that TOU optimization will often cause your AC to run aggressively 1-2 hours before a peak window. Do not be alarmed if your house feels colder than usual at 2:00 PM if your peak rates start at 4:00 PM.
• HVAC Wear and Tear: While saving money, frequent "cycling" to avoid peak hours can put additional stress on older compressors. Ensure your air filters are changed every 30-90 days to maintain efficiency during these high-load pre-cooling phases.
• Seasonal Shifts: Many utilities change their peak windows between Summer and Winter (e.g., peak may be 4 PM-9 PM in July but 6 AM-10 AM in January). Check your ecobee app quarterly to ensure the plan is still reflecting the current seasonal window.
• Eco+ Overlap: If you have both "Time of Use" and "Demand Response" enabled, the Demand Response (utility-led events) will always take priority over the TOU schedule.