Which ComEd Rate Plan Is Cheapest for You? Beta
ComEd offers five different rate plans. We’ll tell you which plan should be cheapest for you over the next year, based on your own past usage.
Questions homeowners ask
It prices a year of your hourly electricity use on each ComEd rate plan, so you can see which plan should cost you the least over the next year. If you’re thinking about a home battery, it also estimates what one could save you. For the plans themselves, read our ComEd Rate Plans explainer.
You need a year of hourly usage from ComEd’s Green Button download and a recent ComEd bill. You can get both in a few minutes while you’re signed in to your ComEd account. The tool walks you through it.
Download the year that ends on the most recent May 31, from June 1 to May 31. The tool shows you the exact dates. With that year, the tool prices each of the plans as accurately as possible. Any other full year also works, if necessary. Upload the ZIP file just as ComEd saved it. You don’t need to unzip it.
No. Your bill shows your rate plan, who supplies your electricity, what kind of home you have, and whether you heat with electricity. Without it, the tool asks you a few questions instead.
It compares five: the Default Fixed Supply Rate, the Default Fixed Supply Rate with Delivery Time-of-Day Pricing, Hourly Pricing, Hourly Pricing with Delivery Time-of-Day Pricing, and Time-of-Day Pricing. If you buy your electricity from an outside supplier, the tool can’t see that supplier’s price, so it compares ComEd’s plans with ComEd’s default rate.
No. We suggest switching only when it saves you at least $100 a year. When the saving is smaller, we advise you to stay on your current plan, although we tell you which one is theoretically cheapest if you want to switch anyway. We also lean toward plans whose prices are set in advance: we recommend Hourly Pricing over one of them only when it saves you more than $100 a year.
Yes. The tool credits the power your home sends to the grid under your net metering. Net metering depends on when ComEd approved your system: homes approved before 2025 earn more for that power than newer homes. Your bill usually shows which kind you have. If it doesn’t, the tool asks you.
Tell the tool when it asks. It then leaves out its estimates for adding a battery, because your meter data already shows what your battery does today.
One battery is a Tesla Powerwall 3 (13.5 kWh). Two batteries are a Powerwall 3 and an Expansion Unit, which adds storage. Each battery charges when electricity is cheap, powers your home when it’s expensive, and keeps 25% of its charge in reserve for outages. We also offer FranklinWH aPower 2 batteries. The savings per battery will be similar to the estimate in the tool. A Certasun consultant can show you either option and estimate your backup time and savings with more batteries, where local rules allow.
No. They’re estimates, not a promise of savings. The tool prices your last year of electricity use as if you use power the same way next year. Your actual bill will depend on how you use electricity and on rate changes ComEd hasn’t announced yet.
We use your Green Button data and ComEd bill to estimate your annual cost on each ComEd rate plan. We may also use them to improve the tool, to analyze ComEd rates and plans in general, and to refine our estimates of how solar or a home battery could affect your bills. We won’t share your data or bill with any third party, and we’ll delete them if you ask. To ask, email info@certasun.com or call (312) 638-0800.
No. You can get your results and stop there. We’ll also email you a copy. If you like, you can reserve an online consultation with us about how solar or a battery could reduce your bills further. We may also email you about lowering your electric bill. You can unsubscribe anytime.