8 segments · 116 companies · as of Sep 18, 2026
Grid & Transmission
Transformers, lines and grid batteries that deliver electricity to the campus fence
Where it sits
Feeds: Data Center Infrastructure
New generation only helps an AI campus when substations and networks can deliver its output. Large transformers, high-voltage equipment, cables, grid controls and construction connect supply to load. Utility-scale batteries smooth peaks and support stability but do not create net energy.
Why now
US large-load commitments, 765 kV projects and renewable integration are driving factory and contractor expansion in 2026. Korean and Asian suppliers are adding capacity, while transformer delivery slots, permitting and storage sourcing rules determine project schedules.
Power transformers
Large power and generator step-up transformers connect plants and campuses to the grid. Qualified factories, voltage ratings and utility approval matter more than catalog capacity; smaller distribution units serve a different part of the network.
Via Hitachi Energy, broke ground on a $457 million South Boston, Virginia large-transformer plant in June 2026
leaderCharlotte large-power-transformer manufacturing expands alongside US grid investment and long delivery queues
leaderProlec GE became wholly owned in February 2026, adding transformer factories and service to the grid business
majorAlabama expansion adds 765 kV capability and targets 50% higher output; completion is planned for April 2027
majorMemphis produces large transformers; September 2026 orders include 345 kV and 765 kV equipment for US AI campuses
majorLS Power Solution, formerly KOC Electric, booked 345 kV transformers for US data centers with 2027-28 delivery
challengerCanadian data-center order covers 21 transformers rated 245 kV, with delivery planned in the first half of 2027
challengerManagement reports five 345 kV transformers for Stargate's first phase; the report does not establish current delivery status
challengerLarge power and generator step-up transformers support Japanese and North American transmission networks
majorLarge AC transformers and converter transformers serve Chinese and export UHV transmission projects
majorVadodara transformer expansion targets Indian HVDC and large-grid demand; listed separately from Hitachi parent
majorIndian power-transformer business expands 765 kV manufacturing capacity for utility transmission projects
challengerUS manufacturing supplies campus substations, including a 200.4 MVA transformer for a Plano, Illinois data center
majorWashington, Missouri expansion increases 1-10 MVA transformer capacity for utility and industrial distribution
majorOil-immersed power transformers reach 345 kV; delivered three-phase units are rated up to 720 MVA for utility substations
challengerSpecialty transformers supply GE and TMEIC renewable-power and industrial-drive systems, including exported power equipment
nicheUS utility distribution transformers include a PSEG supply arrangement extending through 2027
niche
Sources: hitachienergy.com, siemens-energy.com, gevernova.com, prnewswire.com, morningstar.com, transformers-magazine.com
Switchgear & grid protection
Utility breakers, switchgear and protection isolate faults and safely connect new load. High-voltage GIS and outdoor equipment differ from inside-campus lineups; the SF6-free transition adds qualification and manufacturing work.
Via Hitachi Energy, EconiQ includes SF6-free 550 kV GIS for Chubu, extending high-voltage substation options
leaderBlue high-voltage switchgear replaces SF6; 420 kV development with Elia supports the next utility voltage class
leaderg3 GIS and the new 420 kV GL316c CO2/O2 live-tank breaker expand SF6-free utility substation options
majorHigh-voltage gas and vacuum circuit breakers serve utility substations; US switchgear manufacturing is expanding
majorHigh-voltage GIS and 800 kV breaker localization complement Memphis transformers for US transmission customers
majorGIS catalog spans 72.5-800 kV, pairing high-voltage breakers with transformers in utility and generation substations
majorUtility GIS spans 25.8-420 kV; 170 kV, 50 kA g3 equipment adds an alternative insulation platform
majorCooper NOVA NX-T reclosers operate at 15, 27 and 38 kV to protect utility feeders serving new load
majorGM AirSeT extends SF6-free primary distribution switchgear to 36 kV for utility and industrial networks
majorSmart Infrastructure NXPLUS C 24 blue GIS uses Clean Air and vacuum interruption for 24 kV primary distribution
majorUniGear ZS1 air-insulated switchgear covers primary distribution up to 24 kV, with utility protection and control
majorLine surge arresters cover applications through 765 kV, protecting utility conductors and substation equipment
majorPowlVac 5-38 kV switchgear serves utility substations and power plants, including arc-resistant packages
nicheHigh-voltage gas-insulated switchgear supplies Taipower's substation reinforcement and replacement programs
challenger
Sources: hitachienergy.com, siemens-energy.com, gevernova.com, eaton.com, se.com, siemens.com
HVDC & grid stability
HVDC moves bulk power between regions, while STATCOM and related controls stabilize voltage around large and variable loads. Converter technology, system integration and validated grid performance distinguish these suppliers from basic electrical equipment makers.
Via Hitachi Energy, HVDC Light converter stations and MACH controls deliver bulk power into constrained receiving grids
leaderHVDC PLUS voltage-source converters and grid-stabilization systems connect remote generation with major load centers
leaderHVDC converter systems and STATCOM products integrate long-distance power transfers and manage reactive power
majorSTATCOM systems up to 500 Mvar support voltage stability; e-STATCOM development adds short-duration energy support
challengerD-VAR STATCOM dynamically controls voltage at renewable and utility interconnections serving new large loads
nicheVia NR Electric, supplies HVDC converter valves, controls and STATCOM systems for transmission-grid stability
majorSVG/STATCOM units reach 400 Mvar per set and connect at 66-750 kV PCCs for reactive-power compensation
majorBhadla-Fatehpur: supplies converter equipment with BHEL for the 6 GW, 800 kV HVDC link targeting 2029 commissioning
majorVSC-HVDC converter valves rated up to +/-800 kV and control/protection equipment serve Chinese transmission projects
majorConverter transformers, DC valves and smoothing reactors equip long-distance HVDC converter stations
majorHigh-voltage DC switchgear and disconnectors equip converter-station DC yards; this is not converter-valve production
majorHVDC thyristor valves, frequency converters and SVC equipment connect grids and regulate transmission voltage
majorHVDC Diamond VSC converters and SVC-Diamond STATCOM systems control bulk transfer and reactive power
majorINGEGRID STATCOM converters regulate reactive power and voltage at renewable and industrial grid connections
nicheHVDC converter and FACTS/SVC systems support transmission links and voltage regulation on Korea's network
challengerTSVG static-var generators supply dynamic reactive-power support at renewable collection and grid connection points
major
Sources: hitachienergy.com, xjec.com, nrec.com, global.toshiba, psg.mitsubishielectric.co.uk, ingeteam.com
HV cables & conductors
Land and submarine cables carry power from generation and regional networks to substations. HVDC qualification, extrusion and cable-laying capacity are distinct bottlenecks; advanced overhead conductors can increase existing line capacity.
Qualified 525 kV, 90 C HVDC cable systems support high-capacity submarine links; Encore Wire adds US conductor scale
leader525 kV HVDC cable qualified for 3,000-metre water depth in 2026, supporting long-distance interconnectors
leader525 kV HVDC cable qualified for 90 C operation in August 2026; Karlskrona manufacturing capacity is expanding
majorLS Cable's Greenlink Virginia factory builds future 525 kV submarine supply; commercial operations target early 2028
majorShetland 2 agreement uses 525 kV cable; Nigg, Scotland manufacturing is planned to start in 2027
majorDangjin submarine-cable investment and Vietnamese HV expansion target future offshore and utility transmission demand
challengerSeptember 2026 Shinan Wooi contract covers submarine cable transport, laying and burial through 2028
nicheNorth Carolina expansion doubles medium-voltage cable production for US utility distribution networks
challengerLS-VINA and LSCV manufacture power cables in Vietnam for domestic grids and export markets
majorLand and submarine high-voltage power cables connect Japanese and overseas generation to transmission networks
majorC7 composite-core overhead conductors raise transmission capacity while US plants supply utility cable and wire
majorACCC and ACCC Plus composite conductors enable reconductoring; utility users include AEP and Southern California Edison
nicheHigh-voltage and utility power cables plus installation services supply Asian electricity-network projects
niche
Sources: prysmian.com, nexans.com, nkt.com, en.sedaily.com, chosun.com, sumitomoelectric.com
Power plants & grid EPC
EPC firms design and construct generation, transmission and substations. Skilled crews, outage coordination, permitting and equipment procurement determine delivery; these roles concern utility infrastructure rather than general data-center buildings.
AEP collaboration supports new 765 kV transmission; crews deliver substations and high-voltage line construction
leaderE.S. Boulos delivered NECEC substation work, including 345 kV upgrades and two new DC switchyards
majorPower Delivery builds overhead and underground transmission, distribution lines and utility substations
majorUtility transmission and substation engineering and construction combine with power-generation EPC capabilities
majorUtility Infrastructure businesses construct and maintain overhead and underground electric lines and substations
majorElectric utility crews build transmission and distribution networks, including newly awarded 2026 line projects
majorGemma EPC executes the 1.4 GW Ward County, Texas combined-cycle project, with operation targeted for 2029
majorHomer City's planned 4.4 GW gas campus uses power-plant EPC capability alongside transmission and substation work
major765 kV line and substation engineering pairs equipment procurement with utility construction management and EPC
majorGas-plant and grid EPC integrates generation, interconnection studies and substations for colocated power campuses
majorPower Transmission & Distribution executes 765 kV substations and HVDC packages including 800 kV-class systems
majorTung Hsiao 2,800 MW project: balance-of-plant EPC works with Mitsubishi Power's five M501JAC turbines
majorPower-network engineering and grid-connection studies support utility substations and large-load interconnections
major
Sources: aep.com, myrgroup.com, mastec.com, ir.prim.com, sec.gov, kiewit.com
Grid-scale storage
Grid batteries shift energy, reduce peaks and stabilize networks; duration and grid-forming controls determine use. US sourcing rules favor some local cell capacity, while Chinese suppliers remain central globally. Announced 100-hour projects are still future assets.
Megapack utility batteries and the 20 MWh Megablock platform combine storage with grid interconnection equipment
leaderGridstack Pro combines utility battery systems with US-made LFP cells and domestic-content procurement options
majorPowerTitan 3.0 pairs 7.14 MWh containers with power conversion and grid-forming functions for utility storage
majorTENER Stack packages 9 MWh of LFP storage and supports both centralized and string power conversion architectures
leaderLansing US LFP storage-cell production began in August 2026; Tesla Megapack supply is a separate future ramp
majorSBB utility batteries and Indiana LFP expansion address US storage demand; disclosed US orders do not name Tesla
challengerMC Cube-T LFP battery systems serve utility-scale storage and renewable firming outside the automotive business
major628 Ah Mr Big cells and 5 MWh Mr Giant systems support grid projects such as Ruite's 200 MW/400 MWh plant
majore-STORAGE contracts 500 MW/2,493 MWh using SolBank 3.0 for utility capacity and data-center resilience
majorHybridOS controls and acquired Powin assets support utility battery integration; acquisition covered assets, not all Powin
majorGoogle/Xcel Pine Island plan includes 300 MW/30 GWh of 100-hour iron-air storage; deployment awaits project execution
emergingZ3 zinc batteries selected for MN8/Google's 10 MW/100 MWh West Virginia project, with operation targeted for 2030
challengerQuantum/GEMS storage moved to discontinued operations in Q2 2026, exiting into a 50:50 RCT joint venture
majorInfinity Power 6.25 MWh systems serve 2-4 hour storage; the 2026 portfolio adds a 6.9 MWh eight-hour design
majorB-VAULT battery integration and VaultOS dispatch controls serve utility projects; B-Nest targets dense storage sites
challengerIron-flow developer now markets Bridge sodium-ion storage; restructuring and August merger LOI remain unresolved
emergingHyperBlock utility battery systems integrate cells, thermal control and dispatch for large grid-storage projects
majorCenter L Plus integrates grid BESS with SCADA and EMS; a July 2026 creditor restructuring petition adds execution risk
majorTrina Storage's Elementa 3 utility systems combine battery containers and controls for renewable integration
majorUtility-scale battery systems integrate LFP cells, power conversion and grid controls for renewable firming
majorME6 containers use LFP cells for utility and commercial storage; established vehicle batteries are a separate product
challengerIntegrates four-hour utility batteries, including SCE's 537.5 MW/2,150 MWh portfolio at existing substations
majorDevelops lithium-ion grid-side storage systems in China; July 2026 financing supports an early commercial rollout
emergingSeptember 17 binding capacity reservation covers about $53 million of BESS for 2027 Ontario AI sites; factory ramp is pending
emerging
Sources: fluenceenergy.com, catl.com, energyvault.com, businesswire.com, wartsila.com, woodmac.com
Transformer & line inputs
Electrical steel, insulation, tap changers and line hardware enable grid equipment manufacturing. These qualified inputs can limit transformer and transmission output even when final assembly expands; their exposure spans the broader electricity network.
VACUTAP vacuum on-load tap changers regulate large transformer voltage without interrupting service
leaderButler Works grain-oriented electrical steel supplies low-loss cores for US power and distribution transformers
nicheORIENTCORE HI-B grain-oriented electrical steel reduces core losses in large power transformers
majorPG/PH grain-oriented electrical steel grades supply transformer cores through POSCO's steel business
majorJFE G-CORE and JG grain-oriented steel grades supply power and distribution transformer cores
majorCellulose pressboard insulation separates windings and oil gaps in large transformers; capacity expands in Vermont
majorInsulators, connectors and transmission fittings support line construction alongside arresters and utility protection
majorHelical conductor fittings and Stockbridge dampers protect overhead transmission lines against mechanical fatigue
nicheSteel and concrete transmission poles support new high-voltage lines and utility grid hardening
majorEngineered steel transmission structures supply new utility lines; the agreed CRH acquisition remains pending
majorElectrical Steel's powercore grain-oriented strip reduces losses in power and distribution transformer cores
majorJFE joint ventures own operating Nashik GOES production and expand Indian transformer-core steel capacity
challengerHot-dip galvanizing protects steel transmission poles and utility structures from corrosion before installation
majorPVC and HDPE conduit protects buried utility conductors; supplies raceways rather than transformer active parts
nicheBare overhead aluminium conductors and reinforced wire serve utility lines, separate from subsea HV cable systems
majorPower Systems connection hardware and vibration-control components support overhead lines, distinct from insulated HV cables
majorVia Hitachi Energy, transformer bushings insulate high-voltage leads; legacy ABB Power Grids products belong here
majorELANTAS insulation resins and Von Roll laminated and mica materials insulate electrical windings and components
majorBaosteel grain-oriented electrical steel supplies low-loss transformer cores through the listed steel business
majorGrain-oriented silicon steel supplies transformer cores; product qualification and low iron losses determine use
majorMarmon's Hendrix supplies covered conductors and spacer-cable hardware for utility lines, distinct from PCC turbine castings
niche
Sources: clevelandcliffs.com, poscoipc.com, thyssenkrupp-steel.com, jfe-steel.co.jp, azz.com, vonroll.com
Grid Software & Monitoring
Meters, network models, dispatch software and sensors help utilities connect and operate large new loads. Products must measure, control or support operations on the electricity network; generic enterprise software does not qualify.
GridOS orchestrates grid data, network models and operations as utilities assess and connect large new loads
leaderEcoStruxure ADMS combines outage management, load forecasting and embedded DERMS for distribution operators
leaderSpectrum Power ADMS and Gridscale X modules model loads, manage outages and coordinate distributed resources
majorVia Hitachi Energy, Network Manager ADMS integrates SCADA, outage management and distribution-grid optimization
majorNetworked Solutions meters and distributed intelligence expose voltage, load and grid-edge conditions to utilities
majorDoble's doblePRIME monitors transformer condition; protection testing supports substation reliability
majorQualitrol monitors transformer gases, temperature and partial discharge to detect faults in high-voltage assets
majorGridstream AMI and grid-edge analytics serve retained utility markets; EMEA operations were sold to AURELIUS in April 2026
majorVia wholly owned AspenTech, OSI monarch SCADA and ADMS software controls transmission and distribution networks
majorUtilities Network Management System and Grid Edge DERMS coordinate outages, switching and flexible demand
majorDispatch automation, SCADA and protection systems coordinate Chinese transmission and distribution operations
majorIntelliTeam SG uses distributed switch controls to isolate faults and restore utility feeders automatically
nichePowerTrack Optimizer combines forecasting and real-time storage dispatch with demand-response participation
nicheOpenUtilities builds network models for DER analysis and utility asset operation; this is grid engineering software
nicheNIS network models underpin DMS switching-state monitoring, fault isolation and outage restoration
nicheLineRate sensors provide dynamic ratings on National Grid's 115 kV lines, increasing usable transmission capacity
nicheADR sensors calculate dynamic line ratings; partial-discharge monitoring tracks high-voltage asset condition
nicheD-VAR VVO controls distribution-feeder voltage as variable generation and large loads alter network conditions
nicheGrid predictive-maintenance applications identify medium-voltage feeder faults; Enel is a documented deployment
nicheIndustrial routers and Remote Manager connect utility telemetry and distribution automation devices
nichePrivate LTE field-area networks connect grid automation and smart meters, including Germany's 450connect network
nicheFullMAX radios carry utility monitoring and control traffic; grid revenue scale remains limited and uncertain
emergingHirschmann industrial Ethernet switches carry IEC 61850 substation protection, monitoring and control traffic
niche
Sources: investors.itron.com, ralliant.com, doble.com, oracle.com, energy.trimble.com, linevisioninc.com
Glossary
- GSU
- Generator step-up transformer: raises a power plant's generator voltage to the transmission network voltage.
- HVDC
- High-voltage direct current transmission, often used for long-distance links, subsea cables and interconnectors.
- STATCOM
- Power-electronics equipment that injects or absorbs reactive power to stabilize grid voltage.
- GOES
- Grain-oriented electrical steel used in transformer cores to reduce magnetic losses.
- BESS
- Battery energy storage system; MW measures power and MWh measures stored energy, so both matter.
Heat, spend, exposure and shares are editorial estimates. How to read the map ↗