Building on the legacy of Greensmith Energy, Wärtsilä Energy Storage & Optimisation is a leading global energy storage integrator

Towards a 100% renewable energy future

Wärtsilä Energy Storage & Optimisation (ES&O) is a leader in game-changing products and technologies in the global power industry. We’re integrating end-to-end grid solutions that build resilient and intelligent energy infrastructure.

We are unlocking the path to optimised power systems with our flexibility solutions. By integrating renewables, energy management technology, and storage with traditional energy resources, we can deliver reliable clean power for any energy system, from the largest and most complex grids to the most remote and essential islanded systems.

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Sophisticated technology

Purpose-built end-to-end grid management

Using machine learning along with historic and real-time data analytics to optimise the asset mix, our GEMS Digital Energy Platform enables customers to remotely monitor, operate, identify, and diagnose equipment with unrivalled safety, reliability and flexibility. GEMS’ flexible architecture—dynamically adjusting based on market conditions—addresses a critical need for intelligent and adaptable software.

Our GridSolv Quantum energy storage system is one of the first energy storage systems to qualify under the 2023 revision of NFPA 855 and is also compliant with NFPA 69 as well as both UL 9540 and UL 9540A requirements.

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Total flexibility

Leading global energy storage integrator

Combining expertise with deep global resources, Wärtsilä ES&O seamlessly integrates traditional and renewable power sources, provides visibility into critical energy systems, and optimises multiple generation assets. This is all done while delivering unsurpassed reliability, flexibility and safety to energy operators around the world.

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A renewable future realised

Expertise with proven track record

Wärtsilä Energy Storage & Optimisation is a top 5 energy storage integrator globally (S&P Global) with a total portfolio of 12.5 GWh+. Together, we offer unrivaled solutions to the most pressing energy challenges including the integration of more renewables.