Global Thermal Energy Storage Market Industry Market Size, Share - Growth Analysis Report and Forecast Trends 2026-2030

TES systems store surplus thermal energy produced during low-demand or high-generation periods and release it when needed, serving applications across utility-scale power generation, district heating and cooling networks, industrial process heat, and commercial building HVAC systems. The primary technology categories include sensible heat storage (e.g., water, molten salt), latent heat storage (e.g., PCMs, ice), and thermochemical storage, with molten salt being particularly prominent in concentrated solar power (CSP) plants and water/ice storage widely deployed in off-peak cooling applications. The U.S. market alone generated approximately $878.3 million in revenue in 2023 and is expected to reach roughly $2.05 billion by 2030, reflecting strong regional demand alongside broader global growth.

• •Market valued at $5.37 billion in 2025, with projections to reach $12.95 billion by 2035 at 9.2% CAGR
• •U.S. market generated $878.3 million in 2023 and is forecast to reach approximately $2.05 billion by 2030
• •Core technologies include molten salt storage, water/ice thermal storage, phase change materials, and thermochemical storage

The accelerating global deployment of variable renewable energy sources, particularly solar photovoltaics and wind power, is a primary catalyst, as TES provides a cost-effective means of mitigating intermittency by storing excess generation for dispatch during periods of low output or peak demand. Stringent decarbonization mandates and net-zero targets across North America, Europe, and Asia are pushing utilities and industrial operators to adopt TES as a means of reducing reliance on fossil-fuel-based peaker plants and improving overall energy efficiency. Declining system costs, maturing manufacturing supply chains, and growing familiarity with TES among project developers and investors are further lowering barriers to adoption.

• •Rising integration of intermittent renewables creates urgent demand for grid-scale storage solutions
• •Government decarbonization mandates and net-zero policies are accelerating TES adoption in power and industrial sectors
• •Falling system costs and mature supply chains are reducing barriers to commercial deployment

By technology, the market spans sensible heat storage (water, molten salt), latent heat storage (PCMs, ice), and thermochemical storage, with molten salt dominating utility-scale and CSP-linked projects while PCMs and ice storage are gaining traction in building and district cooling applications. Storage capacity segments range from small-scale systems under 100 MWh to large utility-scale installations exceeding 100 MWh, with the latter representing the fastest-growing segment as CSP and industrial thermal projects scale up. Regionally, Europe currently leads adoption due to aggressive renewable targets and established district heating networks, while North America is expanding rapidly, and Asia-Pacific, the Middle East, and Latin America are emerging as significant growth markets.

• •Technology segments: Molten salt, water thermal, phase change materials, and ice storage
• •Capacity segments: Less than 100 MWh (smaller distributed systems) and 100 MWh and above (utility-scale projects)
• •Regional leaders: Europe and North America, with Asia-Pacific, Middle East, and Latin America as emerging markets

What are the recent trends and outlook?

The long-term outlook for the TES market remains robust, with sustained growth supported by declining technology costs, accelerating grid modernization initiatives, and intensifying government commitments to decarbonize the energy and industrial sectors. Thermal storage is increasingly recognized as a critical complement to electrochemical battery storage, particularly for long-duration and high-temperature applications where batteries face economic and technical limitations. Key opportunities lie in district heating and cooling network expansion, industrial process heat decarbonization, and hybrid renewable-plus-storage power projects, positioning the sector for strong growth through 2035.

• •Thermal storage is emerging as a vital complement to electrochemical batteries for long-duration and high-temperature applications
• •Key application areas driving future growth: district heating/cooling networks and industrial process heat decarbonization
• •Market forecast to reach approximately $12.95 billion by 2035, underpinned by declining costs and expanding grid modernization