SEA’s largest Energy Storage System opens in Singapore

It has a maximum storage capacity of 285MWh.

The Sembcorp Energy Storage System (ESS), the largest in Southeast Asia, has officially opened, following its commissioning in December 2022.

In a statement, the Energy Market Authority (EMA) said the utility-scale ESS with a maximum storage capacity of 285 megawatt-hours (MWh) can meet the power needs of around 24,000 four-room HDB households for a day in a single discharge.

The Sembcorp ESS, an integrated system with over 800 large-scale battery units, has a rapid response time to store and supply power in milliseconds which is “essential in mitigating solar intermittency caused by changing weather conditions in Singapore’s tropical climate.”

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EMA added that it can also provide reserves to the power grid.

“This large-scale ESS marks the achievement of Singapore’s 200MWh energy storage target ahead of time. It will complement our efforts to maximise solar adoption by storing and delivering energy given the intermittent nature of solar power,” said EMA Chief Executive Ngiam Shih Chun. 

“The ESS will also enhance our power grid stability and resilience by managing mismatches between electricity demand and supply,” he added.