The Definitive Guide toAI Data Centers
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GuideGlossaryBESS

BESS · Battery Energy Storage System

Facility-scale battery bank that smooths load transients, provides ride-through, and can bridge to generators.

Current numbers

NFPA 855stationary energy-storage fire code governing BESS separation, siting & suppressionas of 2026 ed. · register ↗
~400 J/GPUreported on-rack energy storage on Vera Rubin (~6× GB300), per BESS-for-AI guidanceas of 2026 (roadmap) · register ↗
~400 J/GPUVera Rubin power-smoothing reservoir target; facility BESS roles for transient/ride-through/DRas of 2026 (roadmap) · register ↗

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