Sembcorp Industries has unveiled two clean energy projects on Jurong Island: a “battery stacking” solution and Singapore’s largest ground-mounted solar project.
Sembcorp unveiled at the start of Singapore International Energy Week (SIEW) 2025 on Oct 27 that it had successfully piloted a battery stacking solution at its existing Jurong Island energy storage system (ESS) facility.
This marks the first vertical expansion of an operational ESS on the same land area and enables additional capacity without increasing physical footprint.
Sembcorp’s ESS capacity has since increased from 285MWh to 326MWh. This is sufficient to power around 27,300 four-room HDB households for one day in a single discharge.
Spanning 2 ha on Jurong Island, the utility-scale system was commissioned in six months and has been operational since December 2022.
Following the completion of the stacked ESS units, Sembcorp will also partner the Energy Market Authority (EMA) to assess the ESS’s ability to provide inertia.
Inertia plays a key role in maintaining grid stability by slowing down sudden changes in electricity frequency during disruptions. While traditionally provided by rotating thermal generators, such as combined cycle or open cycle gas turbines, Singapore is now turning to advanced ESS to deliver this stable and responsive alternative, as the nation increases its reliance on solar and electricity imports.
Energy storage plays an important role in enabling Singapore’s energy transition, says Puah Kok Keong, CEO of EMA. “In particular, battery energy storage systems (BESS) have the potential to provide a wide range of energy services, including frequency regulation for the power grid. Our collaboration with Sembcorp will allow us to test and understand these new BESS capabilities better.”
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In addition, Sembcorp has unveiled Singapore’s largest ground-mounted solar project — the Sembcorp Jurong Island Solar Farm, with an installed capacity of 118 megawatt-peak (MWp).
Spanning six interim vacant land parcels in an industrial zone, the solar farm generates clean energy sufficient to power approximately 33,200 four-room HDB flats annually.
JTC’s journey to optimise land on Jurong Island for solar deployment started in 2018 when it awarded the contract for Phase 1 of its SolarLand programme to Terrenus Energy and S.M.E Electrical to set up the island’s first grid-connected solar farm. Since then, more solar panels have been deployed with the award to solarise 60 ha of interim vacant land to Sembcorp Solar Singapore.
Sembcorp currently manages around $1.5 billion worth of sustainable infrastructure on Jurong Island, according to Singapore CEO Koh Chiap Khiong.
“On Jurong Island, we pioneered centralised utilities and were the first to bring piped natural gas from Indonesia to Singapore — critical milestones that continue to support and power our nation today,” adds Koh, who is also president and CEO of Sembcorp’s gas and related services segment.
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Since 2024, all new and repowered natural gas power plants are required to be at least 30% hydrogen-compatible by volume. This means that the plants can burn at least 30% hydrogen, a cleaner fuel, with natural gas making up the rest, to generate electricity.
By 2030, Jurong Island will be home to two 50MW plants (Fast Start) by PacificLight Power (commissioned in 2025), two 340MW open cycle gas turbines (OCGT) by Meranti Power (2025), a 600MW CCGT plant by Keppel Sakra Cogen (2026), a 600MW CCGT plant by Sembcorp Cogen (2026), a 600MW CCGT plant by YTL PowerSeraya (2027) and another 670MW CCGT plant by PacificLight Power (2029).
“With continued investments, such as our upcoming hydrogen-ready power plant, we remain committed to supporting Singapore’s transition to a more resilient, secure and sustainable energy future,” says Koh.
Photos: Sembcorp
