The world’s first commercial gas engine capable of running on a 30 percent hydrogen blend is now available for order. It arrives with a warranty, a service schedule, and a price tag. Kawasaki Heavy Industries began accepting orders for the KG series hydrogen co-firing engine in late September 2025, following an 11 month verification test at its Kobe works.
The KG series engine is not designed to run on pure hydrogen, at least not yet. The 30 percent blend represents what the company calls a drop in compatibility level, meaning facilities equipped with natural gas systems can adopt the engine without replacing distribution lines or storage tanks.
The company’s gas engines division has spent more than a decade refining the underlying platform. Earlier generation KG series gas engines, which have received over 240 orders since 2011, can be converted to hydrogen co firing specifications. That means a power plant built a decade ago on natural gas can begin burning a fuel that did not exist in commercial quantities when the plant was designed. The retrofit pathway extends asset life while gradually decarbonizing fuel inputs, avoiding the capital cost of complete fleet replacement.
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