SUSTAINABILITY
sometimes alternative‐chemistry storage, particularly where diesel runtime expectations are being reassessed in light of ESG targets and permitting pressure.
On the macro side, stationary storage deployment is scaling rapidly in lockstep with digital infrastructure. S & P Global data shows US battery storage developers added 4.5GW in Q3 2025 alone, a 24.5 % year‐on‐year increase, bringing installed capacity in 2025 to nearly 11.6GW and total cumulative capacity to around 41.5GW, mostly four‐hour lithium‐ion. UBS meanwhile projects a“ boom cycle” in global energy storage demand over the next five years, with demand potentially surging 40 % year‐on‐year by 2026 as AI data centres drive the need to balance variable renewables. For operators, this translates into a richer ecosystem of grid‐scale storage projects to contract with – but also
THE LITHIUM ALTERNATIVE
As data centres scale, the reliance on lithium-ion is being challenged by supply chain constraints and fire safety protocols. In 2026, Sodium-ion and Nickel-Zinc( NiZn) have started gaining traction and attention. These non-lithium alternatives offer highly competitive discharge rates essential for AI load ramping, while mitigating thermal runaway risks.
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higher competition for cells, inverters and skilled EPC capacity.
At the cutting edge, AI data centre( AIDC) storage architectures are evolving beyond traditional UPS‐plus‐diesel paradigms. HiTHIUM’ s recent analysis of the AIDC segment forecasts lithium‐ion battery shipments into AIDC power systems growing from 12GWh in 2025 to 61GWh in 2027 and 272GWh by 2030, with long‐duration energy storage( LDES) of around eight hours emerging as a core trend for high green‐power penetration sites. Vendors are already planning for 800V HVDC architectures and“ energy router” concepts that treat storage as a programmable hub rather than an emergency-only asset.
For sustainability‐minded operators, several considerations now dominate RFPs and board conversations:
Runtime strategy: right‐sizing storage( e. g. two‐hour vs eight‐hour) against realistic outage scenarios, grid‐services ambitions and carbon budgets.
Chemistries and safety: weighing lithium‐ion variants against alternatives such as nickel‐zinc, sodium‐ion or
80 April 2026