Proton Energy Systems Inc.

Proton Energy Systems Inc., doing business as NEL Hydrogen US, manufactures hydrogen electrolyzers and gas generators sold to federal agencies as a foreign-owned, for-profit manufacturer, competing on full-and-open procurement without set-aside protection. The company operates from Wallingford, Connecticut, and holds primary NAICS categories in miscellaneous electrical equipment manufacturing, analytical laboratory instrument manufacturing, and industrial gas manufacturing.

The vendor's federal footprint centers on hydrogen generation equipment and maintenance services. NOAA dominates the customer base with 69 awards worth $7.4 million combined potential value, driven by the National Weather Service's reliance on Proton Energy Systems' HOGEN hydrogen generators for upper-air observation stations across the Pacific region and continental United States. Recent NOAA purchases include a $306,816 sole-source procurement for two S40 hydrogen gas generators for Weather Forecast Offices in Guam and Marshall Islands (awarded September 23, 2026, due September 23, 2027), a $276,271 purchase order for replacement HOGEN generators for the National Logistics Support Center in Grandview, Missouri (September 2, 2026), and an $89,475 delivery order for National Weather Service hydrogen generator maintenance supplies and factory maintenance training in Honolulu (July 1, 2026). The Army Research Laboratory awarded a $120,328.50 sole-source purchase order on March 5, 2026, for one Nel Hydrogen model S40 generator with parts and one year of preventative maintenance. The Department of the Navy ranks second by potential value at $6.2 million across five awards under an indefinite-delivery contract (N0017301D2006) with four task orders totaling $6.2 million. The Army Corps of Engineers' Engineer Research and Development Center holds four awards valued at $2.7 million combined.

Proton Energy Systems holds a single-award IDIQ with NOAA (July 1, 2026 through June 30, 2031) with a $1.5 million ceiling for National Weather Service hydrogen generator maintenance supplies and factory maintenance training, with performance at Honolulu, Hawaii and other National Weather Service locations. The Federal Supply Schedule GS07F082AA carries seven task orders worth $220 thousand combined potential value. The vendor's NOAA awards predominantly use sole-source justification based on exclusive manufacture and distribution of S40 generator models compatible with existing HOGEN network infrastructure.

Federal grant work spans renewable energy and electrolyzer development. The Office of Energy Efficiency and Renewable Energy awarded two cooperative agreements in 2024: one for fully automated production of proton exchange membrane electrolyzers targeting the Department of Energy's HyShot goal (awarded October 1, 2024, through September 30, 2026) and another for anion exchange membrane electrolyzer development at 2.0 A/cm2 operation (awarded September 1, 2024, through December 31, 2026). The Army Corps of Engineers' Engineer Research and Development Center awarded a cooperative agreement for low-cost hydrogen production for energy storage and resiliency applications (September 28, 2022, through June 14, 2026). As a sub-recipient, Proton Energy Systems participates in electrolyzer research partnerships with Mott Corp, Georgia Tech Research Corp, and Columbia University, providing PEM electrolyzer manufacturing and testing capabilities from its 100,000 square-foot Connecticut facility.

Activity has remained modest but stable—three awards in 2022 to eight in 2026—with seven awards totaling $1 million in combined potential value facing completion within the next twenty-four months. The vendor subcontracts on electrolyzer development work under Hamilton Sundstrand Corporation (low-pressure electrolyzer cell stack qualification as of December 10, 2025) and supplies hydrogen generators to Atlantic Diving Supply, Inc. as a sub-supplier (March 18, 2024).