 Equalisation of tariffs was not brought in until 1965, and it was due to the SECV itself rather than a response to political pressures.During World War II construction and maintenance work had delayed, and after the war the SECV had difficulty with keeping up with increasing electricity demand.Existing thermal power stations were expanded at Yallourn and Newport, with much bigger generators of 50 MW capacity used, much larger than the 15-25 MW units used pre-war.