Insights

Solid-State Batteries in Stationary Energy Storage

02/23/202602/23/2026 BESS, Energy Storage, Insights, UK

“*Zhejiang Longquan lithium-iron-phosphate energy storage demonstration project” china, a semi-solid state pilot project Source:* https://mp.weixin.qq.com/s/v72lPZcPOqdn8XozKI1Kzg

The Solid-State Offer

Solid-state batteries have the potential to become a commercial reality in the short term and represent a highly promising advance in BESS technology. Solid-state batteries use a metal or ceramic (solid) electrolyte in place of the liquid electrolyte used in current lithium-ion products. Here is why this next generation technology may be worth considering for your energy storage applications.

Enhanced Safety Profile – Solid electrolytes replace flammable liquid components, materially reducing thermal runaway risk, making solid-state BESS ideal for sensitive area installations;
Enhanced Energy Density – Solid-state designs have the potential to achieve energy densities of 300-500 Wh/kg, two to three times higher than liquid designs, which reduces project footprint, land costs, and construction costs;
Longer Usable Life – Solid-state electrolytes minimize dendrite formation and degradation mechanisms, extending lifetime cycles rates from 8,000-12,000 to 10,000-15,000;
Wider Operating Temperature Range – The solid-state technology remains stable across a wider temperature gradient which has the potential to reduce in-service cooling/heating requirements and consequently operating costs;

While initial capital costs remain higher, extended lifespan and reduced construction and operations costs could deliver lower levelized cost of storage (LCOS) over project lifetimes.

Market Development and Key Players

Most of the development in solid-state products is being driven by the automotive industry which is seeking higher density battery technologies which can offer vehicle range at levels comparable with conventional power train options. Japanese manufacturers including Toyota, Panasonic, and TDK are advancing solid-state programs, while QuantumScape (US) and Solid Power (US) are partnering with major automotive and energy companies. In Europe, ProLogium (Taiwan/France) is establishing manufacturing capacity, and Factorial Energy is developing solid-state solutions with strategic partners.

Outlook for Stationary Applications

While automotive applications currently dominate development roadmaps, stationary storage represents an ideal early market. The less stringent weight constraints and longer project timelines align well with current technology maturity. Major industry suppliers, such as EVE, are planning to bring solid and semi-solid products to the stationary storage market as early as 2028.

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