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We're happy to answer questions or help you with returns.
Please fill out the form below if you need assistance.


Email: customercare@amerenillinoiseebusinessstore.com
855-749-2525
Monday to Friday: 8am - 5pm CST
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Confirm Eligibility

We just need to confirm that you are an Ameren Illinois Energy Efficiency Business business customer.

Please enter your Ameren Illinois business account number and the zip code for your account’s business service address.

*You will be asked to complete this step before finalizing your order.

1✔
Confirm
Eligibility
2✔
Create Marketplace
Account

Create Your Ameren Illinois Energy Efficiency Business Online Store Account

  • Passwords must be at least 8 characters.
  • Passwords must include a number.
  • Passwords must include a special character.

    • *You will be asked to complete this step before finalizing your order.

    The Marketplace has been
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