Larry Moulthrop

Larry Moulthrop is a systems and safety professional, focused on hydrogen generation, water electrolysis, hydrogen fuel cells, and H2 fueling systems since 1978.  

Larry retired from Proton Energy Systems (d/b/a Proton OnSite) in 2016, the company he co-founded in 1996 to transition PEM-based water electrolysis technology into commercial packaged H2 generation products. As Vice President of Hydrogen Systems.  Mr. Moulthrop worked with Proton’s engineering and applications teams to refine and develop new packaged hydrogen generator products for vehicle fueling, renewable energy capture, telecom backup power, military applications, and many other hydrogen applications.   Mr. Moulthrop managed Proton’s product safety and product code compliance processes for all product and project efforts at Proton.  For six years he managed operations of 12 fuel cell vehicles fleet and the PV-augmented H2 fueling station based at Proton OnSite.

Mr. Moulthrop serves as the convenor for ISO 22734, Hydrogen Generation using Water Electrolysis, the international water electrolyzer product standard.  He is a member of NFPA 2 Hydrogen Technologies technical committee, ISO TC197 Hydrogen Technologies US Technical Advisory Group, and SAE J2601 Fueling Protocols for Light Duty Gaseous Hydrogen Surface Vehicles committee.

Prior to starting Proton, Mr. Moulthrop led efforts at United Technologies and General Electric that developed and deployed closed-loop H2-O2 regenerative fuel cell systems, 200 bar oxygen generators, primary H2-O2 PEM fuel cells, H2-Cl2 fuel cells for energy storage, and industrial water electrolyzers.   He initiated his career in PEM electrochemistry at General Electric, working with many of the original developers of the PEM art. 

Mr. Moulthrop holds 22 issued US patents in the areas of PEM cell design and PEM system architecture through his work with Proton Energy Systems, United Technologies, and General Electric.  He received his BSChE degree from the University of New Hampshire in 1978.

Proton OnSite