Energetics companies in Mainor Group include AS Dvigatel–Energeetika that is primarily engaged in supplying customers with electricity, water and sewerage, AS Vaivara Wind that is developing wind energy projects, and Doranova Baltic OÜ that is working with environmental protection projects. There are also companies OÜ Mainor Energy Solutions and OÜ Mainarendus in Mainor Group operating in this sector.