Sandviksverket is a biomass CHP plant in Växjö, Sweden. It consists of several units, the main units being a CHP unit (65 MW heat and 35 MW electricity) and a hot water boiler (25 MW) fired with biofuels. For peak load, a CHP unit and several hot water boilers using oil as fuel are available within the system. The system also contains an accumulator tank that can store 2 700 MWh. There are plans on building a new CHP unit fired with biofuels to increase the electricity production as well as the heat and cool, and to minimize the use of oil. The production in the Sandviksverket is one third electricity and two thirds heat used in the district heating network. The heat production in 2011 was 593 GWh and the electricity production was 230 GWh. The electricity produced represents 40-50 % of the electricity consumed in the city of Växjö. In addition, in 2011 a small district cooling network was established, the cooling being produced with absorption technique. In 2011 the fuel mix in the Sandviksverket was 90 % wood fuels, 6% peat and 4 % oil. The wood fuel is produced in the region within an area of 70-100 km from the city of Växjö. 850 000 – 1 000 000 m3 of wood chips are consumed each year.