Edited sentence: A 500 kilowatt (kW) Francis turbine also generates constantly from the compensation flow of water from the reservoir into the North Tyne.Controls were also updated, meaning that the plant can be operated from Dolgarrog in Wales.Following the takeover, the turbines were refurbished in a period 2005-2006, which increased the efficiency of the electricity generation.In December 2005, RWE npower renewables bought the rights to operate the plant and sell the electricity generated by it, with a contract lasting until 2025.It also uses a 5.5 MW Kaplan turbine, which generates electricity when water release takes place.It was opened by Queen Elizabeth II on 26 May 1982 and is owned by Northumbrian Water.Kielder Water is also the site of England's largest hydro electric plant.The plant generates electricity using dual turbines which produce 6 megawatts (MW) of electricity.This gives the reservoir a total generating capacity of 12 MW, and an average production of 20,000 MWh of electricity per year, a saving of 8,600 tonnes of carbon dioxide per year compared to non-renewable methods of generation