The proposed facility, made in partnership with Hygen Energy, will be based in Ballymena.
The new facility would help create a reliable source of fuel for those buses and other hydrogen-powered vehicles.
Jo Bamford, chairman of Wrightbus, said: "Hydrogen is the best means of decarbonising many bus routes, but for this to happen bus operators need a reliable and voluminous supply of low cost, low carbon hydrogen.
"This project will initially be able to produce enough hydrogen to run up to 300 buses, and has the potential to triple in scale as demand for hydrogen increases.  Business Opportunities for the Hydrogen Economy
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