Riverbend Energy Group, an energy investment firm, completed the acquisition of a stake in Harnyss, a hydrogen storage company. Financial terms were not disclosed. “Harnyss’ leading-edge technology offers a low pressure, high density, safe, and cost-efficient storage solution for the rapidly evolving hydrogen econom. Harnyss fits well with the types of businesses and technologies that match our thesis of investing in energy transition service companies across the entire stack of the renewable energy ecosystemy,” Eric Danziger, Riverbend Managing Director.