E.ON has started constructing its Texas Waves power storage project in the USA. The 20 megawatt (MW) storage facility (2 x 2.5 MWh) is being constructed on the sites of the pre-existing E.ON wind farms Pyron and Inadale in West Texas. As an integral part of the wind farms, Texas Waves will be able to react quickly for the network operator, Electric Reliability Council of Texas (ERCOT) to cope with changes in the energy requirements and thereby increase both the reliability and efficiency of the system.
With both the industrial-scale 10 MW plants, E.ON is expanding its role as an important player in the North American power storage market. These are the second and third-largest lithium ion battery systems which are connected to the network which E.ON has installed in the USA. The power storage systems will be taken into operation at the end of 2017.
E.ON's first storage project, Iron Horse, consists of a 10 MW battery and an associated 2 MW solar power plant south-east of Tucson, Arizona. The system has already been commissioned, and helps support the power supplier – Tucson Electric Power (TEP) – with frequency and voltage control providing reliable electricity to over 400,000 customers.