Stirling Engines Market Report 2025

This Stirling Engines market report delivers an in-depth analysis of the market’s key characteristics, including size, growth potential, and segmentation. It provides a detailed breakdown of the market across major regions and leading countries, highlighting historical data and future growth projections. The report also examines the competitive landscape, market share insights, emerging trends, and strategic developments shaping the market.

The stirling engines market size has grown strongly in recent years. It will grow from $1.08 billion in 2024 to $1.18 billion in 2025 at a compound annual growth rate (CAGR) of 9.2%. The growth in the historic period can be attributed to the growing utilization of combined heat and power (CHP) applications, rising demand for clean energy solutions, growing usage of the product in the military and defense sector, growing demand for renewable energy integration, and increasing government support and incentives.

The stirling engines market size is expected to see strong growth in the next few years. It will grow to $1.65 billion in 2029 at a compound annual growth rate (CAGR) of 8.9%. The growth in the forecast period can be attributed to increasing collaboration with research institutions, rising fuel costs, increased enhanced durability and longevity, rising demand for off-grid solutions, and growing global energy demand. Major trends in the forecast period include the development of hybrid piston-rotary configurations, the emergence of rotary stirling engine designs, the development of hybrid systems, investments by governments and private organizations, and the adoption of stirling engines in automotive and aerospace applications.

The growing demand for clean energy solutions is anticipated to drive the expansion of the Stirling engines market in the future. Clean energy is generated from renewable sources such as solar, wind, and hydro, which have minimal environmental impact and produce little to no greenhouse gas emissions. This increasing demand is fueled by rising environmental concerns, regulatory pressures to lower carbon emissions, and advancements in renewable energy technologies. Stirling engines contribute to clean energy by efficiently converting renewable heat sources, such as solar and biomass, into electricity, which helps to reduce waste and emissions while allowing the utilization of low-grade waste heat in sustainable energy systems. For example, in June 2023, the Energy Information Administration (EIA), a U.S. government agency, reported that renewable energy consumption in the United States rose from 12.1 quadrillion British thermal units (quads) in 2021 to a record-high 13.2 quads in 2022. Therefore, the increasing demand for clean energy solutions is propelling the growth of the Stirling engines market.

Key players in the Stirling engines market are concentrating on technological innovations, such as integrating Stirling engine technology with diesel and gas engines, to enhance system efficiency, lower operational costs, and satisfy the rising demand for dependable energy solutions. These advancements offer versatile, low-emission power generation options for both industrial and residential applications, providing sustainable energy alternatives while ensuring high performance in off-grid or backup power situations. For example, in July 2022, Sterling Generators, a machinery manufacturing company based in India, teamed up with Moteurs Baudouin, an engine manufacturing firm from France, to broaden their presence in the auxiliary power sector. This collaboration merges Baudouin’s expertise in high-quality engine engineering with Sterling’s innovative, fuel-efficient power solutions that comply with the latest emission standards. The partnership marks a significant stride toward meeting the growing needs of the genset industry, offering customers reliable, high-quality power solutions along with strong aftermarket support.

In April 2024, GCI Holdings LLC, a US-based renewable energy company, acquired Stirling Ultracold for an undisclosed amount. This acquisition positions GCI Holdings to continue Stirling Ultracold’s innovative legacy and expand its product offerings in the life sciences sector, particularly in biobanking and clinical trials, where the need for ultra-low temperature (ULT) storage solutions is growing. Stirling Ultracold is a US-based provider of Stirling engines.

Major companies operating in the stirling engines market are NRG Energy Ltd, Yanmar Holdings Co. ltd, AMETEK Inc., Stirling Energy Systems, Azelio AB, Bosch Thermotechnology GmbH, Microgen Engine Corporation, Stirling Technology Inc., Qnergy, Infinia Corporation, Kockums Industries AB, ADI Thermal Power Corporation, Bohm Stirling Technik GmbH, Cool Energy Inc., Genoastirling S.r.l., Glen Mills Inc., Skach Manufacturing Co., Swedish Stirling Company, Whisper Tech Limited, Genesis Scientific Ltd., ECOGEN, Solo Kleinmotoren GmbH.

Asia-Pacific was the largest region in the stirling engines market in 2024. The regions covered in the stirling engines market report are Asia-Pacific, Western Europe, Eastern Europe, North America, South America, Middle East, Africa. The countries covered in the stirling engines market report are Australia, Brazil, China, France, Germany, India, Indonesia, Japan, Russia, South Korea, UK, USA, Canada, Italy, Spain.

Stirling engines are heat engines that function based on a closed regenerative thermodynamic cycle, transferring heat to and from a working fluid, which is a gas, at varying temperature levels. Unlike internal combustion engines, Stirling engines are recognized for their high efficiency and versatility, as they can utilize a range of heat sources, including solar, geothermal, or waste heat.

The primary types of Stirling engines include alpha, beta, gamma, and others. Alpha Stirling engines feature two distinct pistons in separate cylinders, one hot and one cold that move in opposite directions. These engines are used in applications such as heating and cooling, solar power generation, marine engines, and more. They serve various end uses, including residential, commercial, and utility applications.

The stirling engines market research report is one of a series of new reports that provides stirling engines market statistics, including stirling engines industry global market size, regional shares, competitors with a stirling engines market share, detailed stirling engines market segments, market trends and opportunities, and any further data you may need to thrive in the stirling engines industry. This stirling engines market research report delivers a complete perspective of everything you need, with an in-depth analysis of the current and future scenario of the industry.

The stirling engines market consists of sales of power generators, micro-CHP (combined heat and power) units, cryocoolers, solar stirling dishes, and waste heat recovery systems. Values in this market are ‘factory gate’ values, that is the value of goods sold by the manufacturers or creators of the goods, whether to other entities (including downstream manufacturers, wholesalers, distributors, and retailers) or directly to end customers. The value of goods in this market includes related services sold by the creators of the goods.

The market value is defined as the revenues that enterprises gain from the sale of goods and/or services within the specified market and geography through sales, grants, or donations in terms of the currency (in USD, unless otherwise specified).

The revenues for a specified geography are consumption values that are revenues generated by organizations in the specified geography within the market, irrespective of where they are produced. It does not include revenues from resales along the supply chain, either further along the supply chain or as part of other products.

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