According to the ESO requirement, the production of electricity from renewable energy sources in the territory of North-East Bulgaria is limited to 40%

By order of the Electricity System Operator (ESO), the production of electricity from renewable energy sources in the territory of North-East Bulgaria is limited to 40% from 10:00 to 17:00 on May 24, 2015. The restriction is imposed in connection with the safety of the operation of the national electricity system.