Upgrade to a Sensi Smart Thermostat for as little as $9*
Get a Sensi Smart Thermostat for as low as $9 and sign up for Peak Time Savings to receive an extra $50 enrollment bonus once your new smart thermostat is installed.
*Sensi ST55U Smart Thermostat offers valid 8/24/26-9/14/26 or while supplies last. Sensi ST55U $129 MSRP. Tax charges may apply. Additional terms apply. See website for full details.
Lifetime limit of 1 thermostat rebate per residential account.
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This account isn't eligible for the Ameren Online Marketplace.
Please check out our other Energy Efficiency programs.
