Layer 1 · Where the power comes from
Fuel cells
Sites needing firm on-site power quickly with better emissions than turbines.
The shape of it
- Lead time
- 9-18 months, among the fastest on this list
- Capital cost
- High per MW
- Carbon
- Lower than turbines on natural gas; near zero on hydrogen, which is rarely available
- Maturity
- proven
Verified 2026-09-06.
The catch
Cost per megawatt is high, and the clean version depends on a hydrogen supply that mostly does not exist yet at this scale.
What it actually decides
The premium bridge option. Chosen when speed matters and gas is politically or contractually unavailable.
What this is powering
A GB200 NVL72 rack draws 120–132 kW and a GB300 pushes 135–200 kW, against a 2026 average rack of about 27 kW. The silicon decision and the power decision are the same decision, made eighteen months apart.
Layer 2 — Silicon · GB200 NVL72 · The 150 W inference option
Weighed against
- Fuel cells vs On-site natural gas turbines — The premium bridge against the default bridge.
Others in where the power comes from
- Grid interconnection — 4-5 years typical, approaching 5 on average
- Nuclear PPA (existing plants) — 1-3 years to contract; the plant already exists
- Small modular reactors (SMR) — 2030s for meaningful capacity
- On-site natural gas turbines — 12-24 months, the fastest firm power available
- Behind-the-meter generation — Depends on the generation, but it skips the queue
- Solar + battery storage — 18-36 months