Long-duration energy storage to double in 2025

Thanks to the increasing demand for energy storage solutions.

More long-duration energy storage systems, or those with capacities exceeding eight hours, are expected to be installed this year, according to S&P Global Commodity Insights.

In its Top Cleantech Trends for 2025 report, installations are anticipated to more than double compared to 2024. This will be driven by the “increasing necessity for reliable energy storage solutions, particularly as a growing share of electricity is generated from intermittent renewable sources.”

“Long-duration storage is essential for capturing excess energy during peak generation periods and bridging the gaps when supply falls short of demand,” the report read.

According to S&P, Long-duration energy storage faces business challenges, but governments and grid operators are pushing forward with targeted procurements to boost grid reliability and build necessary infrastructure.

“Whilst lithium-ion battery technology is beginning to be utilised for eight-hour storage systems, there is a notable shift toward exploring non-lithium technologies, with large-scale commercial deployments of compressed air energy storage on the horizon,” it said.

S&P said multiday storage tenders expected by 2030 are projected to mark a significant breakthrough in the long-duration storage market.

However, the report noted that there are still questions about the commercial and technical feasibility of these large-scale systems as the market develops. Realising the potential in the sector will depend on continued innovation and investment to create a truly clean and reliable energy future, it added.