Substation capacity
The capacity of the local substation that steps grid power down for a data center.
Ranks moderate (60/100) — set apart by current tension (76) and fragility to shocks (70).
Why it matters
It is the physical handoff between grid capacity and on-site power delivery.
Why now
Campus-scale loads now require dedicated substations whose build time rivals the data center itself.
If Substation capacity runs short
Substation delays cap how much of a built campus can actually be powered.
In depth · editorial + model
A substation is where high-voltage grid power is stepped down and handed to a data center; substation capacity is how much a given site's substation can actually deliver. It is the physical handoff between secured grid capacity and on-site power delivery — the point where an abstract interconnection agreement becomes real current at the fence. Campus-scale AI loads now demand dedicated substations whose build time rivals the data center itself, so the handoff has quietly become a bottleneck in its own right.
When substation work slips, only a fraction of a finished campus can be powered, and the co-located constraints compound — a late substation idles everything behind it. Exposure sits with the engineering and grid-equipment firms that design and build them: Quanta Services on construction, Hitachi Energy alongside China's Sieyuan Electric and NARI Technology on the gear, and generators like Talen Energy and NRG that anchor supply to the site. The grid, in effect, ends here.
The companies exposed to Substation capacity
Hitachi EnergySupplier80SGState Grid Corporation of ChinaProducer68
Entergy CorporationETRProducer50
ExelonEXCProducer50002028.SZSieyuan Electric Co., Ltd.002028.SZSupplier40
NARI Technology Co., Ltd.600406.SSSupplier40TLNTalen Energy CorporationTLNSupplier35
NRG Energy, Inc.NRGSupplier30
Vistra CorpVSTIntegrator30
HD Hyundai Electric Co., Ltd.267260.KSSupplier30
LS Electric Co., Ltd.010120.KSSupplier30How to think about it
- The grid ends at the substation
- Co-located constraints compound
What to watch
- Dedicated substation announcements
- Breaker and switchgear lead times
Frequently asked
What is Substation capacity?
The capacity of the local substation that steps grid power down for a data center.
Why does Substation capacity matter for AI?
It is the physical handoff between grid capacity and on-site power delivery.
Who makes Substation capacity?
The companies the model tags as producers or suppliers of Substation capacity: Quanta Services, Hitachi Energy, State Grid Corporation of China, Entergy Corporation, Exelon, Sieyuan Electric Co., Ltd..
Which companies are most exposed to Substation capacity?
Quanta Services, Hitachi Energy, State Grid Corporation of China, Entergy Corporation, Exelon, Sieyuan Electric Co., Ltd. — 12 companies in total are mapped to Substation capacity.
What happens if Substation capacity runs short?
Substation delays cap how much of a built campus can actually be powered.
Where does Substation capacity sit in the AI value chain?
Substation capacity sits in the Energy layer of the AI value chain.
Go deeper on Substation capacity
- The materials, geographies and policies it depends on — heat-mapped
- Substitutes, relief valves and the domino chains if it tightens
- The live tension score, momentum and news drivers
- Four levels of analysis — from plain-English to strategic
model v0.7.0 · research, not advice
Model scores are illustrative reads from our model of the AI value chain — not investment advice.