How Your Electric Car Could Slash Your Power Bills

For many Australians, the promise of lower power bills through solar panels and home batteries has been appealing – but often expensive. Now, new research suggests there may be a smarter (and more affordable) way to take control of your energy costs: your electric car.

A study by researchers from Flinders University, Adelaide University and Murdoch University has found that electric vehicles (EVs) equipped with vehicle-to-home (V2H) technology could dramatically reduce household electricity bills – while also cutting the need for large home battery systems.

Put simply, V2H allows your car to do more than just drive. It turns your EV into a mobile battery, storing energy during the day (for example, from your solar panels) and feeding it back into your home when electricity prices peak in the evening.

The results are compelling. Households using a combination of solar panels, a modest home battery and an EV with V2H recorded the lowest annual electricity costs – around $2,451 per year. That setup also reduced reliance on grid electricity by a remarkable 78 per cent.

Without V2H, households needed a much larger and more expensive battery to achieve similar results – and still ended up paying more overall.

What makes this particularly relevant for older Australians is the potential to simplify and future-proof home energy systems. Instead of investing heavily in large battery storage, your vehicle could do much of the heavy lifting.

There are broader benefits too. By using stored energy during peak times, households can ease pressure on the grid and make better use of renewable energy year-round – even during winter when solar output drops.

While the technology is still emerging in Australia, researchers say it could soon become mainstream as EV adoption grows and more households install solar.

For consumers, the message is clear: the next time you think about upgrading your car, it might also be worth thinking about your power bill.