As of 2 September 2018, there have been 100 major breakdowns at gas and coal plants in the National Energy Market – including every coal-fired power station bar one (Mt Piper). While old subcritical coal plants performed poorly, the newer supercritical plants (so-called “HELE” plants) were even more unreliable. There were also breakdowns at some of the newest gas plants (Tallawarra, Swanbank and Braemar). Victoria’s brown coal plants were the least reliable overall.