Methodology
Primary sources, one link per number, a date on every row.
Where the data comes from
We read first-party product pages, spec sheets, press releases and investor filings. Distributor-hosted copies of manufacturer sheets are labelled in the source title. Every record lists URLs and access dates; every populated field maps to at least one of those sources. Counts link to the downloadable dataset or the filtered list behind them.
Which vendors belong here
This directory covers rotating engine-generator and turbine-generator equipment: generator-drive engine manufacturers, genset packagers, and installed or rental generator suppliers. A service business qualifies when it also documents generator supply for data centers. Related brands can appear separately; vendor counts are not counts of independent corporate groups.
Fuel cells generate electricity electrochemically and sit outside this rotating-generator scope. Bloom Energy and other fuel-cell suppliers are excluded, along with battery, UPS-only, solar and wind vendors. Broadcrown’s row covers the current supply/service business identified on its website, without importing historical manufacturer capacity claims.
Ratings and units
Unit size is electrical output of one genset, engine-generator or turbine package in the named Lines, in kWe. Standby is used when available; prime or continuous ratings are identified in the source and rating notes. For kVA-only figures, the conversion assumes power factor 0.8 and the notes disclose that assumption.
Mechanical engine kWm, multi-generator container output, fleet capacity and plant totals are excluded from electrical unit bounds. Portfolio endpoints can include small portable models or different frequencies and duties. A portfolio maximum does not establish a data-center standby rating. The separate QSK95 DCC fields preserve Cummins’ published Data Center Continuous range.
Fuels, HVO and hydrogen
HVO approved is set only when the vendor states that the named lines are approved or compatible with HVO or EN 15940 paraffinic diesel. Hydrogen quotes the blend share or rating exactly as published: blending options, a percentage by volume or 100% hydrogen. We do not convert or round those claims.
Emissions
Emissions entries reproduce the manufacturer’s model- and market-specific wording. A Tier 4 Final or Stage V option in one product line is not an approval for every model. Rehlko’s KD4000 Tier 2 statement is kept separate from smaller KD Tier 3 models.
Capacity and lead-time news
The capacity column carries the latest dated statement on factory capacity, expansion or large orders for the named lines, from the vendor or its filings. Generator prices and delivery slots are quoted per project: request one through the quote form on any vendor page.
How we verify
Each row shows the date we last checked it. A field is filled only when a source states it; when a vendor does not publish a figure, the cell stays empty. An empty HVO or hydrogen cell means we found no such statement on the pages we read, not that the vendor lacks the feature. Vendors needed at least three sourced fields to enter the table.
Corrections
Vendors and readers can send corrections to hello@generatorvendors.com with a public source. We update the row and its verified date. Featured placement is paid and labelled; it never changes a row’s data or its position in the sorted table.
Reuse
The dataset is free to reuse under CC BY 4.0 with a link to generatorvendors.com. Download it as CSV or JSON.
Field definitions
21 fields- Smallest unit kW
- Lowest published electrical output of one generating unit in the named Lines, in kWe. Portfolio minima may include portable models. Standby where available; kVA-only figures assume 0.8 power factor. Consult Rating basis and scope; blank when unverified.
- Largest unit kW
- Highest published electrical output of one generating unit in the named Lines, in kWe. Standby where available; other duty and frequency bases are disclosed in Rating basis and scope. kVA-only figures assume 0.8 power factor. Mechanical output and multi-unit totals are excluded.
- Prime mover
- What turns the alternator in the named lines: a reciprocating (piston) engine, a gas turbine, or both.
- Fuels
- Fuels the vendor lists for the named lines: diesel, HVO (hydrotreated vegetable oil, EN 15940), natural gas, biogas, propane, hydrogen blends.
- Natural gas units
- The vendor sells gas-fired units (natural gas, pipeline gas or LNG) in the named lines, for standby, prime or bridge power.
- HVO approved
- The vendor states that the named diesel lines are approved or released for HVO (renewable diesel, EN 15940 paraffinic fuel). Blank means no such statement was found on the pages read.
- Hydrogen
- Hydrogen capability exactly as the vendor states it: blend share by volume, '100% hydrogen' or 'hydrogen-ready' with its conditions. Blank when the vendor states none.
- Hydrogen-capable
- At least one named line runs on a hydrogen blend or is sold as hydrogen-ready, per the vendor. Read the Hydrogen field for the share and conditions.
- Emissions certification
- Emissions standards the vendor names for the named lines: US EPA Tier 2 (emergency standby) or Tier 4 Final, EU Stage V, TA Luft, CPCB IV+ (India). Certifications vary by model and market.
- EPA Tier 4 Final
- At least one named line is offered as EPA Tier 4 Final certified (engine or genset). Blank means the vendor's pages do not say.
- EU Stage V
- At least one named model is offered as EU Stage V compliant according to the manufacturer. Version and market matter; a blank cell means the cited material did not establish this field.
- Engines
- Whether the vendor builds the engine or turbine itself or packages engines bought from another maker, per the vendor's own pages.
- Data center offer
- Dedicated: the vendor names a product line or program for data centers. General: a standard range the vendor documents in data center use. Rental: the vendor rents fleet units for data center bridge or backup power.
- Lines
- The product series this record covers. Ratings, fuels and emissions refer to these lines, not to the vendor's whole portfolio.
- Plants
- Factories the vendor names for these generator sets, engines or turbines (city and country).
- Capacity and lead-time news
- The latest dated, sourced statement on factory capacity, expansion investment or lead time for these lines, from the vendor, a filing or trade press. Month and year first.
- Rating basis and scope
- Duty, frequency, fan allowance, conversion basis and model limitations attached to the published kWe endpoints. Mechanical engine kWm and multi-unit container or plant totals are excluded.
- QSK95 DCC minimum kW
- Cummins QSK95 minimum published Data Center Continuous electrical rating, in kWe; distinct from standby and prime. Not a whole-vendor minimum.
- QSK95 DCC maximum kW
- Cummins QSK95 maximum published Data Center Continuous electrical rating, in kWe; distinct from standby and prime. Not a whole-vendor maximum.
- Supply and service scope
- Documented generator supply, installation, commissioning and support services.
- Service coverage
- Territories explicitly covered by the cited generator supply or service offer.