The headline numbers
Valuates Reports values the global BBU market at $8,021M in 2024, reaching $16,634M by 2031 — an 11.0% CAGR. Within that, the data-center segment grows fastest. Pmarket Research estimates data-center BBU battery cells at $1.15B in 2025, expanding to $3.2B by 2032 (15.82% CAGR), driven by hyperscale racks and the 48V/50V architecture transition.
The AI-server demand engine
TrendForce (via 证券日报) projected NVIDIA GB200 shipments of ~60,000 units for 2025, with NVL36 racks using ~1,200 cells and NVL72 racks ~2,400 cells each — a cell-level profit contribution estimated near ¥800M for 2025 alone. As NVL144/288 generations arrive with separate power racks, BBU content per rack rises 50%+.
Snowball-industry trackers put the 2026 AI-server BBU market at ¥30–40 billion (RMB) with year-on-year growth of 80–120% — far above broader GDP growth.
Where the growth is coming from
- Rack power density — GB200→GB300→Rubin pushes racks from ~70kW to 120–140kW+, making rack-level backup essential.
- 48V/50V DC architecture — reduces conversion steps and copper losses vs legacy 12V, accelerating BBU adoption.
- Hyperscaler capex — North America leads (~42% of cell market in 2025), Asia-Pacific fastest-growing.
- Supply bottleneck — Samsung SDI and Panasonic cells are allocation-limited; Chinese suppliers are absorbing overflow orders.
Caveats & risk factors
Supply-demand gaps can close quickly if Korean/Japanese producers add capacity; hyperscaler capex could soften; and Chinese pack makers adding 21700 capacity could trigger price competition. But the structural shift to rack-level backup is independent of any single vendor cycle.
Reach BBU & data-center power buyers
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