Six key developments for battery tech in the energy sector in 2025
Yusuf Latief
Posted on: 17 December 2025
Six global developments in battery technology you should know going into 2026.
Battery technology moved fast in 2025, reshaping how power systems store, manage and deliver energy. From new chemistries to interesting integrations and interconnections, these advances are shifting how the sector balances supply and demand.
Here are five ways batteries pushed innovation across the energy system:
How an Italian company is redefining how the world stores power
Sizable Energy, known for its Gravity Battery, raised $8 million, moving closer to commercialising the patented offshore pumped hydro system.
Heineken installs 100MWh solar heat battery in Portuguese brewery
The beer company partnered with Rondo Energy and EDP on this first Heat-as-a-Service agreement in Portugal, combining solar power and thermal storage to decarbonize industrial processes through heat electrification.
EMEC successfully demos tidal plus storage and hydrogen integration
The European Marine Energy Centre announced the completion of a demonstration, combining an O2 tidal turbine, vanadium flow batteries, and a 670kW electrolyser.
Energy Vault and PG&E launch hybrid battery + hydrogen storage microgrid
Energy storage major Energy Vault and Californian utility PG&E have launched what they say is a unique microgrid platform, combining advanced hydrogen fuel cells with lithium-ion batteries for power resilience in the face of wildfires.
Augwind to build first commercial-scale AirBattery in Germany
Augwind Energy announced plans to build its first commercial-scale AirBattery project in Germany. The tech combines pumped hydroelectric principles with compressed air storage, and is designed for grid-scale storage for up to months at a time.
VERBUND and TU Wien partner on oxygen ion battery development
Austrian energy company VERBUND and research and educational institution TU Wien partnered up to develop innovative oxygen ion batteries, using the movement of oxygen ions between two electrodes to store energy.
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Heineken installs 100MWh solar heat battery in Portuguese brewery
The beer company partnered with Rondo Energy and EDP on this first Heat-as-a-Service agreement in Portugal, combining solar power and thermal storage to decarbonize industrial processes through heat electrification.
- Yusuf Latief
- 05/11/2025
