Entra Energy EOOD is an independent producer of renewable energy that owns and operates small wind and hydro power plants. The company is based in Sofia, Bulgaria while its Wind Farm is located in the central parts of the country and the HPP is situated in the South-West part of the country. Their interest is also pointed at PV installations where they work in partnership with companies that develop and construct solar installations. Entra Energy is making research and development in the domain of renewable energy sources with the purpose of building smarter, more flexible and adaptive grids as well as energy markets. Currently the company’s innovation and R&D are focused on smart grid by making use of IoT, blockchain, crowdfunding, cyber security and new technologies. Driven by their natural curiosity and ambitions to support transformation of the energy system, Entra Energy is developing their RES portfolio and team experience with the purpose of expanding their research areas in the fields of renewables, batteries, smart grid and energy efficiency.