The electric vehicle (EV) revolution is reshaping the way we move and use energy. As a growing fleet of battery-powered vehicles begins connecting to homes and the broader electricity network, they are beginning to influence how renewable electricity is generated, stored, and integrated across the entire energy system.
In the leafy suburbs of Melbourne, Australia, energy-transition evangelist Gavin Mooney is making powerful additions to his home. Like 4.2 million other Australian households, Mooney relies on a relatively-large rooftop solar array to power his home; his system, rated at 9.5 kW, covers most of his daytime electricity needs. For transportation, he drives a Tesla Model X. And in October 2025, he installed a piece of technology that could fundamentally change the way he generates and consumes energy.
To make the most out of his solar generation, Mooney has coupled his rooftop PV array with a 32 kWh battery. He initially considered a smaller 16 kWh system but ultimately chose to “go big” to further reduce his electricity bills. With electricity prices in Australia sitting slightly above the OECD average at AUD0.39 per kWh, the potential savings from generating and storing his own power are significant.