NOAA awarded a purchase order to Proton Energy Systems Inc. (doing business as NEL Hydrogen US) on September 23, 2026, for $306,816 to procure two Proton Energy Systems/NEL Hydrogen S-Series 3, S40 hydrogen gas generators to replace end-of-life S-Series 2 units at the Weather Forecast Office in Barrigada, Guam and the Weather Service Office in Majuro, Marshall Islands. The award was issued as a sole-source procurement under FAR 13.106-1(b)(1), based on Proton Energy Systems' exclusive manufacture and distribution of the S40 generator model compatible with existing HOGEN network infrastructure at National Weather Service Upper Air observation stations. Performance of place is Barrigada, Guam, with ultimate completion by September 23, 2027. The procurement was posted as a special notice on July 2, 2026, with a response deadline of July 17, 2026.