Generatorvendors

Data center generators, compared

37 data center generator vendors compared for backup, bridge and prime power. Engine-generators reach 22.9 MW per unit and gas turbines 380 MW. 20 vendors sell natural gas units, 11 approve HVO renewable diesel and 5 sell hydrogen-capable lines. Every figure links its dated source.

37 vendors 104 sources

Last verified

Generator nameplate with each vendor's largest unit A nameplate listing 37 vendors. Ticks on a logarithmic scale from 100 kilowatts to 1000 MW mark the largest unit each vendor publishes, up to 380 MW. GENERATOR SET · DATA PLATE RATED kWe · 50/60 Hz MAKERS 37 MAX ENGINE SET 22.9 MW WÄRTSILÄ MAX TURBINE 380 MW DOOSAN FUELS GAS 20 · HVO 11 · H2 5 LARGEST UNIT PER MAKER 100 kW 1 MW 10 MW 100 MW 1000 MW Scania: 640 kW Inmesol: 688 kW Volvo Penta: 704.8 kW Aggreko: 1.5 MW HIPOWER Systems: 2 MW Perkins: 2 MW FG Wilson: 2 MW Visa S.p.A.: 2.4 MW Genesal: 2.4 MW Kirloskar: 2.4 MW MHI: 2.42 MW 2G Energy: 2.5 MW Teksan: 3 MW Aksa: 3 MW Himoinsa: 3.2 MW Pramac: 3.2 MW mtu: 3.25 MW Cummins: 3.5 MW Rehlko: 4 MW Generac: 4 MW Baudouin: 5 MW Caterpillar: 5.72 MW INNIO Jenbacher: 10.61 MW Bergen Engines: 11.77 MW HD Hyundai HiMSEN: 21.8 MW Wärtsilä: 22.9 MW APR Energy: 35 MW Solar Turbines: 38 MW PROENERGY: 50 MW GE Vernova: 57 MW Siemens Energy: 66 MW Doosan: 380 MW
Ticks: each maker’s largest unit, 640 kW to 380 MW. Yellow for engines, white for turbines. 10 MW+ prime power units
Prime moverFuelsNatural gas unitsHVO approvedHydrogen-capableEmissions certificationEnginesData center offer
Doosan Enerbility380,0001380,0001Gas turbineNatural gas / LNGYes———Own enginesGeneral range with data center use2026-11-11
Siemens Energy4,000166,0001Gas turbine—————Own enginesDedicated data center line2026-11-11
GE Vernova37,000157,0002Gas turbineNatural gas; Hydrogen blends; Diesel; LPG; BiodieselYes—Yes—Own enginesDedicated data center line2026-11-11
PROENERGY50,000150,0001Gas turbineNatural gasYes————Dedicated data center line2026-11-11
Solar Turbines1,210138,0001Gas turbineNatural gas; Diesel (dual fuel); HVO (configurable on many packages); BiogasYesYes———Dedicated data center line2026-11-11
APR Energy20,000135,0001Gas turbineNatural gas; LNG; LPG; hydrogen options (configuration-dependent)Yes————Rental and bridge power2026-11-11
Wärtsilä Energy10,400122,9001Reciprocating engineNatural gas; Dual fuel (gas and liquid); Liquid fuelYes———Own enginesDedicated data center line2026-11-11
HD Hyundai Heavy Industries (HiMSEN)1,100121,8001Reciprocating engineNatural gas; Dual fuel (natural gas/diesel/HFO); Liquid fuel (model-dependent)Yes———Own enginesGeneral range with data center use2026-11-11
Bergen Engines7,050111,7701Reciprocating engineNatural gasYes———Own enginesGeneral range with data center use2026-11-11
INNIO Jenbacher—10,6061Reciprocating engineNatural gas; Biogas; Hydrogen; LNGYes—Yes—Own enginesDedicated data center line2026-11-11
Caterpillar (Cat Electric Power)6.825,7202Reciprocating engineDiesel———C175-20: EPA Tier 2 stationary emergency builds (3,620 ekW no fan, 3,500 ekW with fan); C175-16: EPA Tier 4 Final packageOwn enginesGeneral range with data center use2026-11-11
Baudouin1,52015,0001Reciprocating engineDiesel; HVO (EN 15940); Natural gasYesYes——Own enginesDedicated data center line2026-11-11
Generac Industrial Energy1,75024,0001Reciprocating engineDiesel; Natural gasYes————Dedicated data center line2026-11-11
Rehlko (formerly Kohler Energy)6024,0001Reciprocating engineDiesel; HVO; Natural gas; LPGYesYes—KD4000: EPA Tier 2 certified stationary emergency; new KD Series 80–600 kW: EPA Tier 3. Certification varies by model and market.—Dedicated data center line2026-11-11
Cummins60073,5004Reciprocating engineDiesel; HVO (HHP diesel sets); Natural gas (HSK78 and QSK60 gas sets)YesYes——Own enginesDedicated data center line2026-11-11
Rolls-Royce Power Systems (mtu)50013,2501Reciprocating engineDiesel; HVO (approved: S4000 Gx3/Gx4, S1600 Gx0/Gx1); Natural gas (Series 4000 gas)YesYesYes—Own enginesDedicated data center line2026-11-11
Himoinsa (Yanmar group)1,00013,2002Reciprocating engineDiesel; HVO (HGY)—Yes——Third-party enginesDedicated data center line2026-11-11
Pramac813,2001Reciprocating engineDiesel; HVO options; gaseous-generator options (fuel unspecified in cited brochure)—Yes——Third-party enginesDedicated data center line2026-11-11
Aksa Power Generation113,0001Reciprocating engineDiesel; Natural gas; GasolineYes————General range with data center use2026-11-11
Teksan48013,0001Reciprocating engineDiesel; Natural gas; BiogasYes———Third-party enginesDedicated data center line2026-11-11
2G Energy1,03512,5001Reciprocating engineNatural gas; Biogas; HydrogenYes—Yes——Dedicated data center line2026-11-11
Mitsubishi Heavy Industries (MHIET)—2,4201Reciprocating engineDiesel————Own enginesGeneral range with data center use2026-11-11
Genesal Energy—2,4001Reciprocating engineDiesel—————Dedicated data center line2026-11-11
Kirloskar Oil Engines2.822,4002Reciprocating enginePetrol; Diesel; Gas (PNG)———CPCB IV+ (India)Own enginesGeneral range with data center use2026-11-11
Visa S.p.A.712,4001Reciprocating engineDiesel—————General range with data center use2026-11-11
FG Wilson5.4412,0001Reciprocating engineDiesel————Third-party enginesDedicated data center line2026-11-11
HIPOWER Systems712,0001Reciprocating engineDiesel—————General range with data center use2026-11-11
Perkins60012,0001Reciprocating engineDiesel; HVO (100%, specified fuel quality); biodiesel blends up to B20—Yes—5000 Series: Tier II and China III emission-capable (manufacturer wording; not blanket certification)Own enginesDedicated data center line2026-11-11
Aggreko2521,5001Reciprocating engineDiesel; Natural gas; LNG; CNG; BiogasYes——US EPA Tier 4 Final rental fleet—Rental and bridge power2026-11-11
Volvo Penta5811704.82Reciprocating engineDiesel; HVO (power-generation engines); Natural gas (G17)YesYes—D16 EU Stage V; D17 EU Stage II / EPA Tier 2 versionsOwn enginesGeneral range with data center use2026-11-11
Inmesol657.616881Reciprocating engineDiesel————Third-party enginesGeneral range with data center use2026-11-11
Scania Power Solutions22416401Reciprocating engineDiesel; HVO (100%)—Yes——Own enginesGeneral range with data center use2026-11-11
Atlas Copco——Reciprocating engineDiesel; HVO—Yes—QAC TwinPower: EU Stage V and EPA Tier 4 Final 50/60 Hz configurations (per rental page)—Rental and bridge power2026-11-11
Broadcrown Power Engineering——Reciprocating engineDiesel (JCB generator supply)————Third-party enginesGeneral range with data center use2026-11-11
Everllence (formerly MAN Energy Solutions)2,4001—Reciprocating engineNatural gas; liquid fuels (dual-fuel engines); hydrogen blendsYes—Yes—Own enginesDedicated data center line2026-11-11
HD Construction Equipment Engine (formerly Doosan Infracore)——Reciprocating engineDiesel (DX12/DP126CA)———DX12/DP126CA: unregulated versionOwn enginesGeneral range with data center use2026-11-11
Yanmar——Reciprocating engineDiesel————Own enginesDedicated data center line2026-11-11

Questions buyers ask

How do the published diesel generator ranges compare?

The named diesel engine-generator portfolios reach 21.8 MW (HD Hyundai HiMSEN), 5.72 MW (Caterpillar), 5 MW (Baudouin) and 4 MW (Rehlko). Model by model, the Cat C175-20 makes 4 MW standby without the radiator fan and 3.9 MW with it, and Generac’s largest diesel, the SD3250, makes 3.25 MW. The Rating basis and scope row on each vendor page gives the duty and frequency behind every figure.

Who makes the largest generators for data center prime power?

Gas engines run to 22.9 MW (Wärtsilä), 21.8 MW (HD Hyundai HiMSEN) and 11.77 MW (Bergen Engines) per unit. Gas turbines go further: Doosan up to 380 MW, Siemens Energy up to 66 MW, GE Vernova up to 57 MW, PROENERGY up to 50 MW, Solar Turbines up to 38 MW and APR Energy up to 35 MW. See prime power generators for AI data centers.

Which generators are approved for HVO?

Cummins, mtu, Rehlko, Himoinsa, Baudouin, Scania, Perkins, Solar Turbines, Volvo Penta, Pramac and Atlas Copco state HVO (renewable diesel, EN 15940) approval or compatibility for their named lines. Rolls-Royce approves mtu S4000 Gx3/Gx4 and S1600 Gx0/Gx1 gensets, and Scania rates its next-generation inline engines for 100% HVO. The HVO list shows unit sizes beside the approval.

Are hydrogen-ready generators available?

What are data center generator lead times right now?

Vendors are adding capacity fast. Rehlko is doubling its Changzhou plant from 5.5 GW to 11 GW a year, Generac bought a Belvidere, Illinois plant for large-megawatt packaging, and mtu locked in five years of Series 4000 capacity with AVK. On the gas side, INNIO booked 1.72 GW of J624 engines from one data center customer. Every dated item is on the lead times page.

Who builds their own engines?

These vendors document in-house engine or turbine manufacture: Caterpillar, Cummins, mtu, MHI, Baudouin, Scania, Kirloskar and INNIO Jenbacher. Himoinsa, Teksan, FG Wilson, Pramac, Inmesol and Broadcrown package third-party engines; Himoinsa uses Yanmar GY engines in its HGY offer. Filter the table by Engines.

How this table is built

Full methodology

Values come from first-party product pages, spec sheets, releases and filings, with distributor-hosted manufacturer sheets labelled in the sources. The small number next to a figure opens that source. An empty cell means the cited material did not establish that field.

Ratings are electrical output per single unit in kWe, standby where a vendor gives both, and kVA converted at 0.8 power factor. Each row carries the date we last checked it, newest 11 Nov 2026. Spot a stale number? Email hello@generatorvendors.com with the source and we update the row.

Free to reuse under CC BY 4.0 with a link to this page: CSV, JSON, llms.txt.