Wartsila is to supply energy storage technology totalling 200MW for two projects in the US state of Texas.
The company will also provide 10-year asset performance agreements for the interconnected stand-alone systems.
The order was placed by Able Grid Energy Solutions, the utility-scale energy storage project development arm of MAP RE/ES.
The Madero and Ignacio energy storage plants will deliver grid support to the Electric Reliability Council of Texas (ERCOT).
Wartsila will supply its GridSolv Quantum energy storage solution, as well as its GEMS smart energy management platform to monitor and control the flow of energy.
The agreements include maintenance services, an availability guarantee and a flexible capacity guarantee based on usage.
The systems are expected to become fully operational starting in January 2022.
MAP RE/ES chief executive Aaron Zubaty said: “The Madero and Ignacio projects will participate in the existing ERCOT wholesale electricity market, delivering key ancillary services required for grid stability, including frequency regulation.
“Years of development by forward-looking innovators like Wartsila now allow us to deploy market-driven solutions that will improve electricity grid reliability and performance while enabling further decarbonisation of electricity markets.”
Able Grid chief operating officer Sharon Greenberg said: “Able Grid selected Wartsila technology, among other considerations, for its critical safety and cyber-security features.
“The system complies with all applicable standards, like UL9540A, to ensure sustained safe and reliable operations.
“In addition, the GEMS Power Plant Controller is US-code based and meets all IEC62443 cybersecurity standards.”
Wartsila Energy Americas VP Risto Paldanius said: “Energy storage is rapidly becoming a key asset for the global energy markets and Wartsila has a leading position in this field.
“In the planning of these installations, we were able to provide solid expertise based on our depth of experience in energy storage, and this added considerable value to our energy optimisation capabilities.”