Flexible power generation

Wärtsilä Energy is at the forefront of the transition towards a 100% renewable energy future. We help our customers and the power sector to accelerate their decarbonisation journeys through our market-leading technologies and power system expertise. Our solutions include flexible engine power plants, energy storage and optimisation technology, and services for the whole lifecycle of our installations. Our engines are future-proof and can run on sustainable fuels.

Our track record comprises 79 GW of power plant capacity, of which 18 GW are under service agreements, and over 125 energy storage systems, in 180 countries around the world. 

Our proudest numbers

79 GW

of power plant capacity installed.


energy storage installations delivered.

99.1 %

annual reliability for power plants operated by Wärtsilä.



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Uncovering the hidden value of reciprocating engines

Decarbonizing the power grid is critical to slowing or stopping climate change, but outdated grid modeling practices do not reflect the modern grid's needs. Hourly modeling devalues flexible, dispatchable energy resources like reciprocating engines and battery storage, making them appear to be more expensive and less valuable. However, sub-hourly modeling can better reveal the optimum mix of generation assets to lower carbon emissions and reduce costs by drilling down to the five-minute increments where energy variability often occurs.

Wärtsilä’s reciprocating engines can respond to any grid needs within five minutes and maintain high performance under extreme operating conditions. They are fuel-flexible and can be easily powered off and on to reduce emissions during peak wind or solar energy availability. As utilities move toward decarbonized energy, RICEs can deliver greater value than fossil fuel alternatives, and sub-hourly modeling proves it.


Market-leading solutions for energy



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Power in a heartbeat -what flexibility truly means

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