Wärtsilä/Greensmith energy storage optimises natural gas plant in Hungary

LinkedIn
Twitter
Reddit
Facebook
Email
The just-commissioned project in Budapest, Hungary. Image: Wärtsilä via Twitter.

An energy storage system running on Greensmith’s GEMS software platform has been installed at a natural gas generation facility in Hungary, by Greensmith’s parent company Wärtsilä.

While energy storage with renewables have grabbed the majority of headlines within the industry, batteries have also been used in a handful of locations in combination with fossil fuel generators recently. China is developing or has already developed several, while there are other projects in territories including Australia.

Located in the Hungarian capital, Budapest, Wärtsilä’s latest project was commissioned yesterday and is the first ever energy storage project on which the company has performed an EPC (engineering, procurement and construction) role. It is also the Finnish corporation’s first ‘engines-plus-storage’ installation.

Delivered for customer ALTEO, a Budapest Stock Exchange-listed developer of energy projects including renewables in Hungary, the plant combines three of Wärtsilä’s W34SG engines with 6MW/4MWh of battery energy storage. Wärtsilä claims the W34SG engines are suitable for delivering both “flexible baseload and peak load” and can support the grid in performing ancillary services applications. The company also said the engines can reach 49% efficiency in five minutes from start up, allowing for faster ramping times than other comparable generators.

This article requires Premium SubscriptionBasic (FREE) Subscription

Try Premium for just $1

  • Full premium access for the first month at only $1
  • Converts to an annual rate after 30 days unless cancelled
  • Cancel anytime during the trial period

Premium Benefits

  • Expert industry analysis and interviews
  • Digital access to PV Tech Power journal
  • Exclusive event discounts

Or get the full Premium subscription right away

Or continue reading this article for free

The hybrid installation will operate in ‘virtual power plant mode’ to help regulate the grid, providing primary and secondary frequency regulation services. This will allow ALTEO to participate in electricity market opportunities for those services, generating revenues. The Greensmith GEMS platform was used to integrate the systems together, while the platform’s software will control the delivery of ancillary services, while analysing ongoing changes in market conditions and rate structures.

Wärtsilä acquired Greensmith in mid-2017 after a period of the two collaborating on projects. Shortly before that takeover, the Finnish company’s energy solutions director had talked up the potential of the latter’s software platforms in enabling greater integrations of systems, including hybrids.

“Wärtsilä is a global energy systems integrator and in the future we will continue to see more examples of energy storage and sophisticated software controls being paired with power plants, wind, buildings and hydro to create hybrid solutions that cut carbon, lower costs and optimise generation,” the company’s Energy Solutions division business development manager Markus Ehrström said.

A schematic example of a hybrid power plant-plus-storage solution. Image: Wärtsilä.
22 February 2027
InterContinental London - The O2, London, UK
The Future of Energy Storage Starts Here Three days in London where developers, IPPs, investors, utilities and the manufacturers building the technology come to close deals, not swap business cards. If you need to be in the room with the people deploying capital into European storage, this is that room.

Read Next

Premium
October 28, 2026
ESN Premium meets Peter Fath, CEO of Valo, about the newly launched energy storage joint venture’s next steps and broader strategy.
October 28, 2026
Sodium-ion’s position has strengthened substantially in the past 12 months but its adoption in Europe depends on several key factors including data centres and their use case, an analyst said.
October 28, 2026
South Korean battery giant LG Energy Solution (LG ES) has signed a non-binding memorandum of understanding (MOU) with owner-operator Energix-Renewable Energies to expand collaboration on energy storage projects in Europe and the US.
October 27, 2026
Owner-operator Giga Storage has finalised financing for the construction of its 350MW/1,400MWh Albatross energy storage project near Neuenkirchen in Lower Saxony, Germany.
October 22, 2026
As demand for battery storage soars, the European Union (EU) has tried to grow its local battery supply chain with mixed success so far, writes PV ESS analyst Charlotte Gisbourne.