Aftermarket Natural Gas Generator Market: Current Analysis and Forecast (2025-2033)

Global Aftermarket Natural Gas Generator Market Size & Forecast

The Global Aftermarket Natural Gas Generator Market was valued at USD 12,500 million in 2024 and is expected to grow at a strong CAGR of around 7.5% during the forecast period (2025-2033F), driven by rising demand for reliable backup power due to increasing grid instability and frequent outages.

Aftermarket Natural Gas Generator Market Analysis

An aftermarket natural gas generator is a natural gas-powered generator that is sold, installed, or serviced once the original equipment has been purchased through the manufacturer. It has the replacement units, the upgraded gensets, the refurbishment of the systems, and all the related parts like the engines and the alternators, control panels, filters, and spark plugs.

The aftermarket natural gas generators market is expanding as the demand to have consistent, uninterrupted power continues to increase due to grid outages, extreme weather conditions, and the overall growth of the industry. This is because businesses and households are adopting cleaner and more efficient sources over diesel systems, natural gas generators are gaining wide adoption, and therefore, creating a demand in terms of maintenance, repair, upgrades, and component replacement services. Moreover, technological innovations, like remote monitoring and predictive maintenance, are also inspiring users to spend more money on aftermarket solutions, leading to their further growth.

Global Aftermarket Natural Gas Generator Market Trends

This section discusses the key market trends that are influencing the various segments of the global aftermarket natural gas generator market, as found by our team of research experts.

Integration of IoT and AI-based Diagnostic Tools in Generator Servicing

Intelligent Diagnostic tools that combine IoT and AI are among the future trends in the Aftermarket Natural Gas Generator market, revolutionizing the monitoring, maintenance, and service of generators. IoT sensors allow tracking the performance of the engine, fuel consumption, emissions, and health of the components in real time, and AI algorithms process the data to predict failures before they happen. This transforms reactive to predictive maintenance, which in turn saves much on downtime, operating costs, and equipment life cycle. Aftermarket services are becoming more efficient, proactive, and customer-specific as the service providers are able to remotely troubleshoot and identify the problems, schedule the maintenance, and provide upgrades based on the data.

Aftermarket Natural Gas Generator Industry Segmentation

This section provides an analysis of the key trends in each segment of the global aftermarket natural gas generator market report, along with forecasts at the global, regional, and country levels for 2025-2033.

The Service & Maintenance Segment Dominates the Global Aftermarket Natural Gas Generator Market

Based on type category, the market is categorised into service & maintenance, repair, overhaul & remanufacturing, and upgrades & modifications. Among these, the service & maintenance segment has the highest market share because the natural gas generator needs to be checked, the components should be replaced, and fine-tuned at least once a month in order to be reliable and meet the safety standards. This segment is leading since it is a recurring, vital service on the total installed base of generators. However, the upgrades and modification area will experience the most rapid expansion due to increasing requests for efficiency enhancements, digital monitoring technologies, emission-control upgrades, and the modernization of the aging gensets. With industry trends shifting toward cleaner, more efficient power solutions, users are increasingly investing in upgrades to be safe from complete replacements.

The Industrial Segment Dominates the Global Aftermarket Natural Gas Generator Market

Based on the application category, the market is segmented into residential, commercial, and industrial. Among these, the industrial segment has the highest market share because manufacturing plants, oil and gas plants, data centers, and utilities are using natural gas generators to provide continuous or backup power, and thus, this has led to high demand for maintenance, repair, and overhaul services. However, the commercial segment is projected to expand the most in the future because of increased concerns about power reliability in hospitals, retail centers, telecom towers, commercial buildings, and the blistering growth in data centers. Moreover, the further rise of urbanization and the rise in uptime necessities will also increase aftermarket demand in the business environment.

North America holds the largest market share in the global Aftermarket Natural Gas Generator market

The global aftermarket natural gas generator market is dominated by North America because it has a huge number of natural gas generator systems installed in industries, commerce, and residential sectors. The area is highly affected by natural weather-related inconveniences such as hurricanes, fires, and winter storms, which have greatly raised the use of alternative power systems. Also, the region has strict environmental laws promoting the replacement of diesel generation by cleaner natural gas generation plants, which increases the demand for upgrades and retrofits. The successful networks of services, the significant use of advanced technologies of maintenance, and the intensive investments in infrastructure and data centers also contribute to the development of aftermarket service in the North America region.

The United States held a Dominant share of the North America Aftermarket Natural Gas Generator Market in 2024

The North America aftermarket natural gas generator market was dominated by the United States because it has a broad base of commercial and industrial facilities that have to rely on natural gas gensets to supply power to its facilities. The aging grid infrastructure and the growing demand for data centers, hospitals, and manufacturing plants in the country are driving demand for constant maintenance, repairs, and upgrades. Also, the presence of natural gas in large quantities and good fuel economics makes gas generators more preferred compared to diesel units, which is an added benefit to the aftermarket ecosystem. Another advantage of the U.S. is the high level of service capabilities, the high presence of OEMs, and its fast-moving towards digital monitoring and predictive maintenance technologies.

For instance, in November 2024, Wärtsilä signed a deal to supply 507 MW of natural-gas generators to a US data-center developer, deploying 27 of its 50SG engines with deliveries beginning in 2027. The agreement highlights Wärtsilä’s growing role in providing reliable, low-emission backup power for large-scale data-center infrastructure.

Aftermarket Natural Gas Generator Industry Competitive Landscape

The global aftermarket natural gas generator market is competitive, with several global and international market players. The key players are adopting different growth strategies to enhance their market presence, such as partnerships, agreements, collaborations, geographical expansions, and mergers and acquisitions.

Top Aftermarket Natural Gas Generator Market Companies

Some of the major players in the market are Caterpillar, Cummins Inc., Generac Power Systems, Inc., KOHLER CO., Wärtsilä Corporation, Himoinsa S.L. (Yanmar Holdings Co., Ltd.), Atlas Copco Group, Briggs & Stratton, LLC, mtu (Rolls-Royce plc), and Mitsubishi Heavy Industries, Ltd.

Recent Developments in the Aftermarket Natural Gas Generator Market

• In October 2025, Rolls-Royce announced that it is expanding its energy portfolio with new mtu gas engines that feature fast-start capability, making them particularly suitable for powering data centers and stabilizing the power grid. Starting in 2026, the new 20-cylinder MTU Series 4000 L64 engine for the 60 Hz market (primarily North America) will be able to deliver its full output of 2.8 Megawatts in just 45 seconds.

• In July 2025, CNPC Jichai launched its new L20V200 high-power natural gas generator set, a 2000 kW unit that delivered an electrical efficiency of 42%, placing it at an internationally advanced level. The product addressed long-standing market demand for domestically manufactured high-power gensets above 2000 kW and marked a significant step toward cleaner, more efficient, and locally produced green power solutions.

Global Aftermarket Natural Gas Generator Market Report Coverage

Reasons to Buy the Aftermarket Natural Gas Generator Market Report:

• The study includes market sizing and forecasting analysis confirmed by authenticated key industry experts.

• The report briefly reviews overall industry performance at a glance.

• The report covers an in-depth analysis of prominent industry peers, primarily focusing on key business financials, type portfolios, expansion strategies, and recent developments.

• Detailed examination of drivers, restraints, key trends, and opportunities prevailing in the industry.

• The study comprehensively covers the market across different segments.

• Deep dive regional level analysis of the industry.

Customization Options:

The Global Aftermarket Natural Gas Generator Market can further be customized as per the requirements or any other market segment. Besides this, UnivDatos understands that you may have your own business needs; hence, feel free to contact us to get a report that completely suits your requirements.