Longi releases new alkaline electrolyzer

China’s Longi claims that its new ALK Hi1 electrolyzer can produce hydrogen with an energy content of 4.3 kWh per normal cubic meter. It says the levelized cost of hydrogen could be up to 2.2% lower than other electrolyzers on the market.

February 16, 2023 Vincent Shaw

Image: Longi

From pv magazine Global

Longi Hydrogen, a subsidiary of Chinese module manufacturer Longi, said on Tuesday that it has released a new line of alkaline electrolyzers.

It said the standard ALK Hi1 electrolyzer can achieve an energy content of 4.3 kWh per normal cubic meter (Nm3) with a full-load DC power source. It claimed that its ALK Hi1 Plus version can achieve an energy content of 4.1 kWh/Nm3, or even as low as 4.0 kWh/Nm3, at a current density of 2500 A/m2.

Li Can, a researcher from the Chinese Academy of Sciences (CAS), said that electrolyzers now on the market can achieve an average energy content of 4.5-4.6 kWh/Nm3.

“If renewable energy can deliver power at around CNY0.2 ($0.03)/kWh, Longi’s electrolyzer can produce hydrogen at CNY1 per cubic meter which is close to hydrogen from coal,” he said.

Longi Hydrogen said the new ALK Hi1 series can directly reduce 10% of DC electricity use in hydrogen generation, for a levelized cost of hydrogen (LCOH) reduction of between 1.8% to 2.2%.

“This compensates for between 10% to 25% of the initial investment,” the company said.

Longi Hydrogen said its ALK Hi1 line has been tested and certified by third-party authorities such as Det Norske Veritas and Dekra. Representatives from Wanhua Chemical and China National Energy (CHN Energy) participated in the new product release.

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