Guest essay by Eric Worrall

h/t JoNova – Major employers are getting fed up, as South Australia, rapidly becoming the world’s renewable energy crash test dummy, has again experienced a costly unscheduled blackout.

BHP issues jobs warning after another SA blackout

South Australia’s electricity system separated from the national power grid overnight, prompting a stern warning from BHP Billiton about threats to Australian jobs and investment.

About 200,000 homes and businesses lost power for over an hour, but BHP’s Olympic Dam operations in the north of the state were interrupted for about four hours.

The Australian Energy Market Operator (AEMO) confirmed today that the disconnection happened at 1.33am, due to “an issue on the Victorian transmission network, impacting the flow via the Heywood Interconnector to South Australia”.

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BHP CEO Andrew Mackenzie issued an urgent warning to policy-makers after the latest incident, which comes two months after the statewide…