Power lines and voltage tower

Wholesale Electricity Market (WEM)

The WEM supplies electricity to the south-west of Western Australia via the South West Interconnected System (SWIS). A unique feature of the WEM is the Reserve Capacity Mechanism, which ensures that there is enough generation to meet demand at all times.

Idea light bulb

Understanding the WEM

The WEM provides electricity to more than 1.1 million businesses and households in WA.

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