AEP Ohio debuts battery energy storage system

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Columbus, Ohio, September 14, 2011 — AEP Ohio is testing an energy backup system that will supply customers with electricity for a limited time during power outages.

AEP Ohio has begun the installation of its Community Energy Storage system, designed to improve electrical reliability and better serve customers.

CES is a lithium-ion-based battery system that provides up to several hours of backup power during a power outage for customers who are connected to the CES unit. Each unit will power two to five homes.

The exact amount of time the battery can provide power will depend on how much energy is stored in the battery at the time of the outage, and how customers connected to the battery use energy in their homes during the outage.

An average AEP Ohio outage typically lasts about two hours. Customers using the CES unit who conserve energy during an outage may not experience any loss of power for the entire outage time. AEP Ohio plans to notify customers when their power has switched to battery backup.

Sensing technology present in each CES unit recognizes when a home served by that unit loses electric power. When a power outage occurs, the CES battery automatically and rapidly begins providing power to the home via a transfer process that should occur without any impact on electric power quality. When AEP Ohio restores power to the affected homes, customers are transferred from the battery unit back to the electric grid.

AEP Ohio has a technology alliance with S&C Electric Co., which designs and manufactures the PureWave CES units, adhering to AEP Ohio’s specifications. S&C’s IntelliTeam Distributed Energy Management system will also control and dispatch all 80 CES units planned for this project, allowing them to function as a virtual power plant.

CES units are provided by AEP Ohio at no additional cost to the customer. In addition, customers who voluntarily agree to have a CES unit installed on their property will receive a $250 incentive.

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The Clarion Energy Content Team is made up of editors from various publications, including POWERGRID International, Power Engineering, Renewable Energy World, Hydro Review, Smart Energy International, and Power Engineering International. Contact the content lead for this publication at

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