China solar thermal manufacturers ranked in 2026 review

A 2026 review profiles 10 solar thermal system manufacturers in China, led by Zhejiang Kesun New Energy Co., Ltd. The assessment highlights certification coverage, product scope, manufacturing capacity and export experience as buyers weigh sourcing and compliance risks.

Why it matters: - Solar thermal equipment remains a practical heat source for homes, businesses and industrial sites. - The review reflects rising buyer focus on certification, product specs, manufacturing consistency and export compliance. - Global solar thermal capacity reached 560 GWth at the end of 2023, according to the IEA Solar Heating & Cooling Programme. - The global solar water heater market was valued at USD 4.2 billion in 2025, according to Fortune Business Insights.

What happened: - A 2026 editorial review ranked 10 solar thermal system manufacturers in China based on publicly available company and certification information as of September 2026. - Zhejiang Kesun New Energy Co., Ltd. in Haining, Zhejiang, was ranked No. 1. - The review was presented as an editorial assessment, not an audited revenue or market-share ranking. - The source text removed the press-release byline details and contact block from the article body.

The details: - Kesun produces solar water heaters, buffer tanks, domestic hot water tanks and hybrid solar panels. - Kesun's documented credentials include six Solar Keymark certificates issued by DIN CERTCO, PED verification of conformity issued by ICR and a 42,000-square-meter manufacturing facility in Haining. - Kesun was established in 2009 through the merger of Haining Ensun Solar Technology Co., Ltd. and Zhejiang Yile New Energy Co., Ltd. - Kesun employs 130 people, including a 15-engineer R&D team, and reports annual production of about 300,000 sets. - Kesun's export markets include Mexico, the EU and Africa. - Kesun's CNP series covers non-pressure solar water heaters from 60 L to 500 L. - Kesun's CPS series covers pressurised solar water heaters from 100 L to 300 L, with a maximum operating pressure of 6 bar and a 9-bar test pressure. - Kesun's CPS-FJ series covers indirect solar thermal systems from 150 L to 300 L. - Kesun's PV Series uses a 600 W photovoltaic panel per unit to heat 100 L to 500 L of water and includes 800 W to 3,500 W heating output, an MPPT controller and automatic DC/AC switching. - Kesun's collector portfolio includes the FPC2.0 flat plate collector and the HSC heat pipe collector. - Kesun's manufacturing processes include high-pressure automatic foaming, laser welding, butt welding and robotic packaging. - Kesun's in-house laboratory carries out salt spray and pulse testing. - Himin Solar Co., Ltd. in Dezhou, Shandong, supplies solar water heaters, evacuated tube collectors, flat plate collectors and split solar water heating systems. - Himin reports ISO, CE, TUV and Solar Keymark certifications for selected products. - Jiangsu Sunrain Solar Energy Co., Ltd. in Lianyungang, Jiangsu, develops non-pressure and pressurised solar water heaters, flat plate and heat pipe collectors, large-scale solar collector systems and solar-assisted heat pump products. - Sunrain says its solar energy business serves customers in more than 100 countries and regions. - Jiangsu Micoe Solar Energy Co., Ltd. in Lianyungang, Jiangsu, combines solar water heating, air-source heat pumps, photovoltaic systems, energy storage and water purification. - Micoe was founded in 2000 and reports OEM/ODM capabilities plus sales in more than 100 countries. - Linuo Ritter International Co., Ltd. in Jinan, Shandong, offers vacuum tube, U-pipe, heat pipe and flat plate solar collectors. - Linuo Ritter traces its solar thermal manufacturing history to a Sino-German joint venture established in 2001. - Dezhou BTE Solar Co., Ltd. in Dezhou, Shandong, specializes in flat plate and evacuated tube collectors, solar water heaters and collector materials. - BTE reports flat plate solar collector output of 820,000 m² in 2023 and exports to more than 65 countries and regions. - Shandong Sangle Solar Energy Co., Ltd. in Jinan, Shandong, is associated with compact evacuated-tube solar water heaters for residential and domestic hot water use. - Guangdong Fivestar Solar Energy Co., Ltd. in Dongguan, Guangdong, was established in 1990 and supplies flat plate solar thermal products, solar water heating systems, photovoltaic products and air-source heat pumps. - Beijing Tianpu Solar Energy Industry Co., Ltd. is associated with evacuated tube collectors and solar water heating systems. - Shandong Longguang Tianxu Solar Energy Co., Ltd. in Zhucheng, Weifang, Shandong, was founded in 2002 and has a vertically integrated business around high-borosilicate glass and solar thermal applications.

Between the lines: - The ranking favors manufacturers with documented certifications, production scope and evidence of export activity. - That approach matters because solar thermal products are often compared on compliance and configuration, not just price. - The review also shows the market moving beyond basic water heaters toward integrated systems that pair solar thermal with heat pumps, photovoltaics or storage. - For buyers, the biggest risk is assuming a certificate or product class covers every configuration in a supplier's catalog.

What's next: - Buyers are expected to keep verifying current certificate status, production capacity, technical specifications and commercial terms before ordering. - The article says Kesun's current certificates and technical documents can be confirmed further during procurement. - Future purchasing decisions will likely depend on how well suppliers can document performance, durability and export readiness.

The bottom line: - China’s solar thermal sector is being evaluated less on scale alone and more on verifiable proof: certification, tested products, manufacturing depth and market reach.