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Pure Power

How Does Pure Power® Work?

When you enroll in Pure Power, you can match your electricity usage with clean, renewable energy that's being generated from wind farms in the Midwest. The cost is 1 cent more per kilowatt-hour(kWh) and the additional charge goes to the purchase of Renewable Energy Certificates (RECs). Ameren Missouri gets 100% of the RECs for the Pure Power program from Midwest wind farms like Farmers City Wind Farm in Atchison, Missouri.

For my home 

Residential customers can participate in Pure Power in one of three ways:

  • 100% Pure Power Usage: For the average Ameren Missouri customer, 100% Pure Power usage will add an additional penny charge for each kilowatt-hour (kWh) of electricity used each month. This will add around an additional $10 to your bill each month depending on your electric usage. (If you don’t know your monthly usage, you can view your personal usage history by either logging in or signing up for Ameren Missouri’s online account.)  
  • Pure Power Blocks: Purchase Pure Power Blocks* for an additional $10.00 per each 1,000 kWh block. One block captures the green power attributes (greenhouse gas reduction) from 1,000 kWh (or 1 megawatt-hour) of regional renewable energy delivered to the Midwest energy pool.  
  • Pure Power Half Block: Purchase a 500 kWh Pure Power Half Block for $5 a month. This option is designed for customers who want to support renewable energy at a more economical commitment level.

For my business

Business customers who participate in Pure Power indicate how many Blocks* you wish to purchase. Each 1,000 kilowatt-hour (kWh) block costs $10 - which equals one Renewable Energy Certificate (REC) from regional renewable sources that will be added to the Midwest energy pool.

Business customers interested in a no-obligation Pure Power proposal can contact the Pure Power team. Or, if you already know how many blocks your business would like to purchase and are ready to sign up, see sign-up information below.

Pure Power business customers can receive support to help promote your business’s commitment to renewable energy.

Other Information

Pure Power funds are used to purchase Green-e Energy Certified® RECs from regional wind energy and other renewable generation facilities. More about certification.

No contract is required to participate in the Pure Power program. For more information, review the FAQs.

Pure Power customers may cancel their participation in the program at any time by contacting the Ameren Missouri Customer Service Center at 800.552.7583, or by emailing us.

Participation in this program does not constitute the purchase of energy. Renewable Energy Certificates, which represent the environmental attributes associated with past renewable energy generation, are retired on behalf of program participants. All RECs purchased under this program are Green-e Energy Certified® by the independent Center for Resource Solutions.

*1 Block = 1 Renewable Energy Certificate = 1,000 kilowatt-hours

For a complete list of the resources included in Pure Power along with highlights of the conditions of your subscription, view the Product Content Label.

Pure Power is Green-e Energy certified, and meets the environmental and consumer-protection standards set forth by the nonprofit Center for Resource Solutions. Learn more at www.green-e.org.

Ready to sign up or have questions?

Sign up online

Fill out our Pure Power® form

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