Today’s Solutions: December 19, 2025

The blockchain is coming to Australia’s electricity grid. On 25 August, a group of neighbours will test a system to trade excess energy from solar panels between themselves using a blockchain to record the transactions. Run by local start-up PowerLedger, the trial at a retirement village in the city of Busselton, Western Australia, is another sign of the energy industry’s growing curiosity about the technology.

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