Diamond Lite, a Swiss engineering firm founded by Hansjörg Vock in Herisau in 1982, used to be something of a European office for products by American electrolyzer manufacturer Proton OnSite. That changed last summer, when it was purchased by Swiss energy services provider Alpiq Holding, based in Lausanne, on June 30. With the acquisition of Diamond Lite, Alpiq has made a strategic investment in its growth markets. The deal expands its portfolio to include turnkey power-to-gas production systems, which it will design, install and market for customers in Europe’s industry. The sale of Diamond Lite came on the heels of Proton’s takeover by Norwegian manufacturer Nel Hydrogen in early 2017.