The total annual electricity consumption is almost 200.000 MWh (1.800 MWh in Psara). The most energy-consuming sector is the residential buildings, as it occupies a merit of 52%, whereas 31.9% of it is consumed by the commercial sector. The RES share in electricity production in 2017 was 13.5%. The maximum peak load demand in 2016 was 46.8 MWe.
Electricity production peaks take place twice during a year, one in August and one in January, mainly attributed to increased heating needs during winter and the introduction of tourists during summer, since in Psara, the population during summer period is increased by 65%. 10 heavy oil engines are installed at the Autonomous Power Production Station of Chios of 70 MWe.