Three Peebles-La-Cour rotary converters of 500 kilowatt capacity was also installed to supply DC current for the Geelong tramways and older DC city supplies. The fuel used was Black coal from Newcastle that was brought from fuel storage yards some distance away. The station was converted to burn brown coal briquettes in 1931, with the stokers to the boiler replaced by locally produced ones of overfeed design. The use of black coal was phased out by 1937. After 1930 the station was transferred to the State Electricity Commission of Victoria, and was operated with one generator set out of service, giving a useful capacity of 7500 kilowatts, and an overload capacity of 9375 kilowatts. The Geelong Harbour Trust had also been responsible for the supply of electricity to the port of Geelong, with these responsibilities acquired by the SECV from midnight 13 June 1938.