Aussie home builder Metricon Homes has teamed up with solar provider CSR Bradford to offer a 5kW 'Solar ChargePack' including a Powerwall 2 battery, solar panels and inverter to every new house that the company builds in South Australia. It's saying the battery and solar setup, at a small additional cost on top of, y'know, an actual house, could make residents up to 90 per cent self-sufficient and save over $2000 in electricity bills per year.