E.ON started work on two 9.9 megawatt (MW) short-duration energy storage projects using lithium-ion battery technology. The Texas Waves projects will be an integral part of the existing Pyron and Inadale wind farms in West Texas.

These projects will be the second and third grid-connected lithium-ion battery systems installed by E.ON in North America and are expected to be online by the end of 2017. Iron Horse, E.ON's first grid connected lithium battery system project, consisting of a 10 MW energy storage facility with an adjacent 2 MW solar array southeast of Tucson, Ariz., provides frequency regulation and voltage control support.

Texas Waves are designed to provide ancillary services to the Electric Reliability Council of Texas (ERCOT) market and will be capable of responding to shifts in power demand, potentially increasing system reliability and efficiency.

E.ON selected Greensmith Energy for energy storage software and services and hired Primoris Renewable Energy for engineering, procurement and construction on the Texas Waves projects.