Several major solar power companies in China are making forays into the hydrogen sector in search of the next big investment opportunity in the clean energy sector as China has been supporting the development of hydrogen energy.

Solar power player GCL New Energy Holdings Ltd, a unit of GCL Group, recently announced its entry into the hydrogen sector. It vowed to produce 2.3 million metric tons of ammonia annually, which can supply 700,000 tons of "blue" hydrogen for the domestic market.

"Blue" hydrogen is produced by transforming methane into hydrogen plus carbon dioxide, while "green" hydrogen-also referred to as "clean hydrogen"-is produced by using clean energy from surplus renewable energy sources, such as solar or wind power.

Aiming to build itself into a comprehensive hydrogen service provider without subsidies, the company will also build 100 comprehensive energy stations by 2025 with an annual production capacity of 400,000 tons, as it believes there is huge market demand for hydrogen energy in China, said Zhu Gongshan, founder and president of GCL Group.

Believing the next 10 years will be a golden decade for the rapid development of China's hydrogen energy industry, many other solar giants are also making their debut in the hydrogen market.

The world's largest solar company, LONGi Green Energy Technology Co, is ready to invest in hydrogen to support renewables and reduce carbon emissions. It entered the hydrogen market in April through a joint venture to drive more green energy spending.

This was followed by the announcement of Jinko Solar, which also vowed to accelerate its march into hydrogen energy with plans to deploy future industries.

Hydrogen energy, which has been listed among China's Long-Range Objectives Through the Year 2035, is expected to become one of the six future national industries this year with unprecedented attention. The Hydrogen Industrial Technology Innovation Alliance of China estimates that the country's hydrogen energy industry output value will reach 1 trillion yuan by 2025.