분석은 데이터 센터 전력용 배터리 에너지 저장 시스템(BESS)의 경쟁 포지셔닝을 검토한다.

A July 2026 Volta Foundation report examining battery energy storage systems (BESS) in data center applications identifies two areas where batteries decisively win, four where they compete but have not yet prevailed, and two where they lose ground to rival technologies.

The competitive case for BESS is already established. Vendors including Energy Vault, Eolian, Fluence, Hithium, and ZincFive are supplying data centers, while major hyperscalers—Alibaba, Tencent, ByteDance, Meta, Google, and Microsoft—continue investing in the technology. The two decisive advantages are speed-to-power and lower cost per megawatt-hour compared to gas generation. "Flexibility is a battery's main benefit for data centers and grid operators," the Volta Foundation report states. "BESS wins the jobs that reward speed and daily cycling: peak shaving against demand charges, and bridge power as the battery layer of a gas-or-engine hybrid."

In peak shaving and demand-charge management, BESS can discharge through costly hours, though the economic case depends on regional rate structures—areas without demand charges eliminate this advantage. Bridge power—temporary electricity for data center assets waiting in interconnection queues—highlights BESS's speed advantage, though the report identifies fuel cells as a competitor for these deployments. Batteries also compete in curtailment flexibility, uninterruptible power supply (UPS) ride-through, grid services, and sub-second power quality, where software tools and power electronics have matured.

BESS remains uncompetitive where sustained energy, long-duration backup, or continuous prime power is required. Jobs beyond four hours of backup continue to rely on diesel, while continuous prime power remains dominated by gas turbines and fuel cells.

Regulatory momentum toward grid flexibility, shifting data center power architectures, and gas turbine supply constraints all favor battery adoption. However, significant barriers remain. Lack of load visibility hinders power suppliers in meeting data center demands, while the absence of standardized integration methods creates investor uncertainty. Most deployment problems emerge during commissioning and the first two years of operation—stemming from integration, controls, and dispatch governance rather than battery chemistry.

The industry's direction hinges on the next two to three years. "If curtailment-based interconnection becomes the norm and duration economics keep improving, installed BESS earns a standing operational role in shaping load, shaving peaks, and selling grid services," the report states. "However, if queues clear faster than expected and gas supply loosens, more of it reverts to idle backup." Regardless, batteries provide value as a facility's power management layer, with realization dependent on industry and regulatory decisions.

Vertical integration by hyperscalers such as Google and xAI may reshape the market if the pattern holds, potentially making data center operators the largest buyers for grid-scale batteries. The United States will lead as BESS's primary data center market and is setting interconnection rules for these loads.

Volta Foundation's recommendations address three constituencies: data center developers and hyperscalers should design hybrid architectures from inception, specifying batteries for daily duty so backup capability emerges as a byproduct, and rank power options by time-to-power alongside levelized cost. Grid operators and policymakers should standardize curtailment-based interconnection, clarify dispatch rates and market participation for batteries serving large loads, and standardize tariffs to prevent confusion. Battery and integration companies should develop products around load archetypes, emphasizing high-power cells for some applications and energy-dense cells for others.