Collaboration focuses on the potential of Power Purchase Agreements, energy-efficient mechanical systems, and innovative financing solutions for commercial buildingsBEVERLY HILLS, Calif., Oct. 19, 2026 (GLOBE NEWSWIRE) -- Green Rain Energy Holdings Inc. (OTC: GREH), a clean-energy company focused on renewable power solutions through its subsidiary, Green Rain Development, is highlighting the potential of commercial energy infrastructure opportunities through its channel partnership with MES Mechanical Energ ...