The technology is new, chargers are expensive and regulations hard to navigate – but all that could soon change

Our cars sit unused most of the time. If you have an electric vehicle, you might leave it charging at home or work after driving it. But there’s another step you could take. If you have a bidirectional charger, you can set it to sell power back to the grid when demand is high.

Fewer than 10 people across Australia actually do this, because the technology – known as vehicle-to-grid (V2G) – is very new. To date, it only works with a single car model (Nissan Leaf) and a single charger (Wallbox Quasar 1). We’ve estimated the number of users based on sales of this charger. The chargers are expensive and there’s a thicket of regulations to navigate.

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You originally think of it as a car you can also use to power your house. [But actually] it’s a house battery you can drive around.