Electric Generating Set | Market Size, Share & Growth Report 2025-2034
The Electric Generating Set Market Report is Segmented by Power Rating (Up to 75 kW, 75 kW - 375 kW, 375 kW - 750 kW, 750 kW - 2000 kW, and Above 2000 kW), Fuel Type (Diesel, Gas, Hybrid, and Others), End-User (Industrial, Commercial, and Residential), Application (Standby Backup Power, Prime/Continuous Power, Peak Shaving, and Combined Heat & Power).
Electric Generating Set Market
Market Analysis
How the market stands today, and what is shaping it
The global generator sets market was estimated at approximately USD 43.57 billion in 2025 and is projected to reach around USD 86.36 billion by 2034, representing a CAGR of approximately 7.90% from 2025 to 2034, based on Core Market Research estimates. The market covers diesel, gas, hybrid and other fuel types across ratings from under 75 kW to above 2000 kW, sold into industrial, commercial and residential buyers for standby, prime, peak shaving and combined heat and power duty. Growth is led by data centre construction pulling demand into the largest rating bands, with Cummins attributing an 18 percent rise in third-quarter 2025 Power Systems revenue to that source. The constraint is that aggregate growth conceals a divided market, since Generac's residential-weighted sales fell 2 percent over the same year, and battery storage is displacing the set in peak shaving. Caterpillar and Cummins lead the engineered bands while Generac leads distribution-sold standby, and no participant reports generator set revenue separately. Asia Pacific held the largest regional share in 2025.
Market Dynamics
Key market dynamics and their impact on the industry landscape
Market Drivers
- Data centre construction is pulling demand into the largest rating bands. Cummins reported Power Systems revenue of USD 7.46 billion for 2025 across the whole segment, up 16.46 percent, with third-quarter segment revenue rising 18 percent to USD 2.00 billion on power generation demand for data centre applications.
- Engine and control advances are widening what a single set can be asked to do. Hybrid configurations pair an engine with battery storage so the engine starts only once the battery is exhausted, and dual-fuel and hydrogen-capable variants let the same installation meet tightening emissions limits without replacing the alternator, switchgear or enclosure.
- Emissions regulation is reshaping specification rather than suppressing demand. A standby set runs few hours a year and is regulated on potential emissions rather than actual output, which pushes buyers toward gas and dual-fuel variants. Gas grows at a CAGR of 8.95 percent in the data centre segment against diesel's 74 percent share.
- Much of this demand is mandated rather than chosen. Hospitals, data centres, telecom sites and public buildings buy standby capacity against a building code requirement or an insurance condition, so the purchase is funded from a compliance budget. That makes commercial and institutional demand markedly less cyclical than industrial capital spending.
- Suppliers are concentrating on power generation rather than diversifying away from it. Platinum Equity completed the separation of Kohler Energy in May 2024, the business rebranded as Rehlko on 17 September 2024, and it then sold its electrification division Curtis Instruments to Parker-Hannifin for USD 1 billion in cash.
Market Challenges
- This market is moving in two directions at once, and a supplier's exposure determines which one it experiences. Cummins reported Power Systems revenue up 16.46 percent for 2025 and Caterpillar reported Energy and Transportation sales up 17 percent in the third quarter, while Generac Holdings recorded full-year net sales down 2 percent to USD 4.21 billion across its whole company. Aggregate market growth conceals a residential and small commercial segment that is not participating.
- The product burns fuel, and that is a structural exposure rather than a cyclical one. Corporate emissions reporting brings on-site combustion into scope for the buyer, and standby sets are regulated on potential rather than actual emissions in several jurisdictions. A supplier whose installed base is diesel faces a slow transfer of specification toward gas, dual-fuel and hybrid configurations that it has to fund without a corresponding rise in unit volume.
- Data centre demand concentrates order books in a small number of customers on a short horizon. Hyperscale buyers order in large blocks against construction programmes that can be re-phased, so the visibility a large order provides is weaker than its size suggests. The capacity a supplier adds to serve that demand has a longer life than the programme that justified it.
- Battery storage and grid connection are alternatives in applications the generator set previously held alone. Peak shaving in particular can be served by a battery with no fuel logistics, no emissions permit and no maintenance visit, and where a firm grid connection arrives the prime power case disappears entirely. The set retains an advantage in long-duration outages, which is a narrower position than it once occupied.
- No participant reports generator set revenue as a separate line. Cummins discloses Power Systems at USD 7.46 billion for 2025 covering engines and power generation together, Caterpillar reports Energy and Transportation across several markets, and Generac's USD 4.21 billion covers its whole company. Market share in generator sets is therefore not measurable from company reporting.
Opportunities
- Peak shaving and grid services could turn standby assets into earning ones. A set installed for outage protection sits idle for most of its life, and where a network pays for dispatchable capacity the same asset may generate revenue between outages, which changes the investment case from insurance to return.
- Africa's prime power base could support a service business larger than the equipment sale. Where a set runs as the primary source rather than as backup, fuel, parts and maintenance accumulate over the asset life, and a supplier able to sustain a service network may capture recurring revenue that the machine sale alone does not provide.
- Hybrid configurations have potential to reach sites that neither an engine nor a battery serves well alone. Pairing storage with an engine so the engine starts only when the battery is exhausted reduces run hours, fuel handling and noise, which could open urban and emissions-constrained locations that a conventional set would not be permitted to occupy.
- Combined heat and power may widen where a matched year-round heat load exists. Recovering engine waste heat raises overall fuel efficiency substantially, and district heating schemes, hospitals and process industries could justify continuous operation on efficiency grounds where a standby set would never be economic.
- The newly independent suppliers may be more willing to move than their former parents. Rehlko gained independence in May 2024 and immediately sold its electrification division for USD 1 billion in cash, which suggests focused ownership could accelerate portfolio decisions that a diversified group would have deferred.
Trends and Insights
Key market trends shaping the industry landscape
Data Centres Reshape The Rating Mix
High impactShort-termDemand is concentrating in the largest rating bands, with Cummins Power Systems revenue rising 16.46 percent to USD 7.46 billion in 2025 and Caterpillar Energy and Transportation sales rising 17 percent in the third quarter of 2025.
Insight: A market historically balanced across rating bands is tilting toward engineered projects above 750 kW, which rewards suppliers with switchgear, controls and commissioning capability rather than those with distribution reach.
The Market Splits By Customer
High impactMid-termResidential and small commercial demand is flat or declining while industrial and data centre demand grows, shown by Generac's full-year 2025 net sales falling 2 percent to USD 4.21 billion against double-digit growth at the segment-reporting suppliers.
Insight: Headline market growth no longer describes what any individual supplier experiences, so a forecast applied uniformly across a product range misstates the outlook for both halves of it.
Gas Gains On Diesel At The Margin
Medium impactLong-termDiesel held more than 74 percent of data centre generator revenue in 2024 while the gas segment grows at a CAGR of 8.95 percent, faster than the market as a whole.
Insight: The transfer is happening at the specification stage rather than through replacement, so it shows up in new build long before it affects the installed base or the aftermarket revenue attached to it.
Ownership Separates From Diversified Groups
Medium impactMid-termKohler Co. separated its Energy division with Platinum Equity in May 2024, the business rebranded as Rehlko in September 2024, and it then sold Curtis Instruments to Parker-Hannifin for USD 1 billion.
Insight: Focused ownership sharpens portfolio decisions in a business that diversified parents had run as a stable contributor, which raises the pace at which capability is bought and sold across this market.
Growth Follows Grid Weakness
High impactLong-termThe fastest regional growth is in the Middle East and Africa at a CAGR of 9.35 percent to 2031, and India leads Asia Pacific at 8.0 percent, both driven by prime rather than standby duty.
Insight: Prime duty generates fuel, parts and service revenue over the asset life rather than a single equipment margin, so growth in these regions is worth more to a supplier with a service network than the unit numbers suggest.
Segment Analysis
Market segmentation by power rating, fuel type, end-user, application
The five rating bands describe different customers rather than different sizes of the same customer, and they are mutually exclusive. Up to 75 kW is the residential and small commercial band, sold in volume through distribution and increasingly in air-cooled form, and it is where Generac Holdings Inc. built its position. The 75 kW to 375 kW band covers small commercial premises, telecom sites and construction, where the set is a standard product rather than an engineered one. From 375 kW upward the sale becomes a project: the 750 kW to 2000 kW band and the above 2000 kW band are where data centres, hospitals and industrial plants buy, and where the engine, alternator, controls, switchgear and fuel system are specified together. Value is concentrating at the top of the range, because the data centre demand that lifted Cummins Power Systems revenue 16.46 percent in 2025 is bought almost entirely in the two largest bands. No publisher splits this market across all five bands on a consistent basis.
Geography Analysis
Regional market analysis
Asia Pacific
Asia Pacific holds the largest share of the global generator sets market on every published measure examined, at 38.6 percent in 2025 on one, 36.65 percent of global revenue on a second and 50.4 percent on a third and broader reading. The spread reflects scope rather than disagreement about leadership. The region's position rests on prime and continuous power rather than on standby duty. Grid reliability in parts of South and Southeast Asia makes the generator set a primary source rather than an insurance policy, and industrial construction adds new load faster than network capacity is built. India is the fastest-growing national market within the region at a CAGR of 8.0 percent. China contributes both demand and a large domestic manufacturing base that competes mainly within the region rather than in the export markets the American and European suppliers contest.
North America
North America accounted for 20.5 percent of the global generator sets market in 2025 and is where the sharpest divergence inside this market is visible. Data centre demand is lifting the upper rating bands. Cummins reported Power Systems revenue of USD 7.46 billion for 2025 across the whole segment, up 16.46 percent, and Caterpillar reported Energy and Transportation sales of USD 8.397 billion in the third quarter of 2025 across all its energy markets, up 17 percent. Over the same period Generac Holdings, whose sales are weighted toward residential standby, recorded full-year 2025 net sales of USD 4.21 billion across its whole company, down 2 percent. Three of the five Major Players are headquartered here, and the region sets the emissions standards that shape engine design for export markets.
Latin America
Latin America is not separately quantified in the regional splits examined, which allocate share to Asia Pacific, North America and Europe and leave Latin America inside an unallocated remainder. No regional market size or growth figure specific to generator sets was identified for the region. Demand is weighted toward prime and continuous power rather than standby, because grid reliability varies widely and industrial and mining sites frequently operate beyond the reach of firm supply. Brazil and Mexico carry the largest installed bases, and mining operations in Chile, Peru and Brazil buy in the upper rating bands. None of the five Major Players manufactures complete sets in the region at scale, so supply is import-led and exposed to tariff and currency conditions, with local assembly and packaging the usual route to regional content.
Europe
The European generator sets market is projected to grow at a rate of over 7.5 percent a year by 2035, the second-highest published regional rate after the Middle East and Africa. Demand here is almost entirely standby rather than prime, because grid reliability is high and continuous on-site generation is uneconomic against network supply. That makes emissions regulation the dominant commercial variable rather than fuel cost, since a set that runs only a few hours a year is regulated on its potential rather than its actual emissions. Rolls-Royce Holdings plc participates through mtu, whose engines also power the Rehlko KD product line, so a single European engine platform reaches the market through two of the five Major Players. Data centre construction in Ireland, the Nordics and the Netherlands is the most active source of new demand in the upper rating bands.
Middle East & Africa
The Middle East and Africa is the fastest-growing region in this market. Regional market revenue is projected to compound at a CAGR of 9.35 percent to 2031, ahead of the rate of over 7.5 percent published for Europe and of every other regional rate identified. The growth has two separate sources. Gulf construction and industrial investment add standby and prime load in the upper rating bands, alongside the hospitality and infrastructure programmes running across Saudi Arabia and the United Arab Emirates. Across much of sub-Saharan Africa the generator set is the primary source rather than a backup, because network coverage and reliability leave industrial, commercial and institutional sites dependent on their own generation. That gives the region an unusually high share of prime and continuous duty, which raises fuel consumption and service revenue relative to the equipment sale.
Competitive Landscape
Key players and market positioning analysis
Competition in this market is organised by rating band, and the suppliers that lead one band are not the ones that lead another. Caterpillar Inc. and Cummins Inc. dominate the engineered upper bands where data centres, hospitals and industrial plants buy. Caterpillar reported third-quarter 2025 Energy and Transportation sales and revenues of USD 8.397 billion across all its energy markets, up 17 percent. It reorganised its reportable segments during the year, and Power and Energy segment profit reached USD 1.841 billion in the fourth quarter, up 25 percent. Cummins reported Power Systems revenue of USD 7.46 billion for 2025, up 16.46 percent and 22.17 percent of company revenue, with the segment recording record full-year sales and profitability on data centre demand. Generac Holdings Inc. holds the opposite position, built on residential and small commercial standby sold through distribution, and its full-year 2025 net sales of USD 4.21 billion across the whole company were down 2 percent with net income of USD 160 million against USD 316 million. Rolls-Royce Holdings plc participates through mtu, and the relationship is more significant than a supplier list suggests, because mtu engines also power the Rehlko KD generator product line. Rehlko itself is the newest independent participant, established as a stand-alone business in May 2024 when Platinum Equity completed its transaction with Kohler Co. and rebranded on 17 September 2024. It then narrowed to engines and power generation by selling Curtis Instruments to Parker-Hannifin for USD 1 billion in cash. Several organisations shape competition without appearing in the ranked list. Kohler Co. remains an investment partner in Rehlko rather than a competitor in its own right, and Platinum Equity holds the majority position. Chinese and Indian manufacturers supply large domestic volumes in Asia Pacific, the region holding the largest share of this market, but compete mainly within it. Because no participant reports generator set revenue as a separate line, the ranking here rests on disclosed segment revenue and stated product scope rather than on measured share. Differentiation is moving toward emissions pathway and control integration rather than toward engine performance, which is now broadly comparable across the field.
Major Players
Leading companies in the market
Industry Developments
6 recorded developments
Cummins Inc. reported Power Systems segment revenue of USD 7.46 billion for 2025, an increase of 16.46 percent from USD 6.41 billion in 2024, and 22.17 percent of the company's total revenue. Third-quarter segment revenue rose 18 percent to USD 2.00 billion, driven by power generation demand for data centre applications, and the segment recorded record full-year sales and profitability.
Caterpillar Inc. reported third-quarter 2025 Energy and Transportation sales and revenues of USD 8.397 billion, up 17 percent from USD 7.187 billion a year earlier, within company-wide sales and revenues of USD 17.6 billion. The company reorganised its reportable segments during 2025, and Power and Energy segment profit reached USD 1.841 billion in the fourth quarter, up 25 percent on higher sales volume and favourable price realisation.
Generac Holdings Inc. reported full-year 2025 net sales of USD 4.21 billion across the whole company, a decline of 2 percent from USD 4.30 billion in 2024. Net income was USD 160 million against USD 316 million, and adjusted earnings before interest, tax, depreciation and amortisation were USD 716 million at 17.0 percent of net sales. The contrast with the data-centre-exposed suppliers shows the market splitting rather than moving as one.
Rehlko sold its electrification division, Curtis Instruments, to Parker-Hannifin for USD 1 billion in cash. The disposal concentrated the business on engines and power generation shortly after it gained independence, and it illustrates how the newly separated generator businesses are narrowing their scope rather than diversifying away from combustion.
Platinum Equity completed the Kohler transaction in May 2024, establishing the former Kohler Energy as a stand-alone entity with Kohler Co. remaining an investment partner. On 17 September 2024 the business rebranded as Rehlko, continuing the KD generator product line and its engine partnership with mtu, with existing Kohler warranties carried over.
Kohler Co. announced in November 2023 that it would establish its Energy division as an independent business, with Platinum Equity as majority investment partner. The decision separated a power generation business with more than a century of history from a group whose principal activity is kitchen and bath products, and it set in motion the largest ownership change among the leading generator set suppliers in recent years.
Table of Contents
13 comprehensive chapters
1.1 Market Definition
1.2 Scope of the Study
1.3 Research Objectives
2.1 Research Approach
2.2 Data Sources
2.3 Market Estimation Approach
2.4 Forecast Assumptions
2.5 Research Limitations
3.1 Market Overview
3.2 Market Size and Forecast
3.3 Key Findings
3.4 Market Structure
4.1 Market Drivers
4.2 Market Challenges
4.3 Market Opportunities
4.4 Market Trends and Insights
5.1 Market Segmentation Overview
5.2 By Power Rating
5.3 By Fuel Type
5.4 By End-User
5.5 By Application
6.1 Asia Pacific
6.2 North America
6.3 Latin America
6.4 Europe
6.5 Middle East & Africa
6.6 Regional Market Comparison
7.1 Industry Developments
7.2 Industry Timeline
8.1 Market Structure and Competitive Positioning
8.2 Major Players
8.3 Strategic Developments
8.4 Key Competitive Factors
9.1 Caterpillar Inc.
9.2 Cummins Inc.
9.3 Generac Holdings Inc.
9.4 Rolls-Royce Holdings plc
9.5 Rehlko
10.1 Market Size and Growth Outlook
10.2 Regional Market Outlook
10.3 Future Market Trends
10.4 Key Risks to the Forecast
11.1 Growth Opportunities
11.2 Key Risks and Constraints
11.3 Strategic Considerations
13.1 Glossary of Terms
13.2 Abbreviations
13.3 Research References
Scope of the Report
Report coverage and methodology
Study Period
Base Year: 2025
Forecast Period: 2025 - 2034
Geographic Scope
Asia Pacific, North America, Latin America, Europe, Middle East & Africa
Companies Covered
Caterpillar Inc., Cummins Inc., Generac Holdings Inc., Rolls-Royce Holdings plc + more
Data Sources
Primary research, industry interviews, regulatory filings, company reports
Frequently Asked Questions
Common questions about this report
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