Toyota Exploring How EVs Can Feed Electricity Back To The Grid

Toyota is stepping into a new role for electric vehicles, not just as cars, but as part of the solution to growing pressure on the power grid.

At its North American headquarters in Plano, Texas, the Japanese automaker is running a pilot programme that looks at how EVs can send electricity back to the grid when it is needed most. 

The project, reported by InsideEVs, is being carried out with local utility Oncor and uses bidirectional charging technology developed by Fermata Energy. A Japanese-spec Toyota bZ4X is already being tested, feeding stored energy back into the grid instead of only drawing power from it.

Toyota is not limiting the trials to Texas. Similar programmes are already taking place in San Diego and Maryland, involving major utilities such as San Diego Gas and Electric and Pepco. 

The broader aim is to understand whether EVs can help stabilise the grid during peak demand, act as backup power sources during outages, and lower electricity costs by charging during off-peak hours and supplying power when demand is high.

While it may sound counterintuitive to rely on EVs, which need electricity to operate, bidirectional charging effectively turns them into mobile energy storage units. 

Toyota highlighted the scale of the opportunity, noting that the roughly four million EVs currently on US roads could collectively provide power equivalent to about 40 nuclear reactors. For context, there are 94 nuclear reactors operating in the United States today.

The pilot programme began in 2022 and has since shifted towards studying real-world impact. Toyota says the technology could ease pressure on ageing infrastructure such as transformers and transmission lines, potentially reducing long-term costs for utilities and consumers.

Interestingly, although automakers like Hyundai, Nissan, Ford and General Motors already offer EVs with vehicle-to-grid capability, Toyota does not yet provide this feature in its production models. This pilot could be an important step in that direction.

Toyota Motor North America senior vice president of enterprise strategy and solutions Christopher Yang said the initiative goes beyond vehicle technology. 

It is about rethinking how cars can support the wider energy ecosystem, helping customers save money, supporting communities during power disruptions, and reducing overall carbon emissions.

If the trials deliver positive results, electric vehicles may soon play a much bigger role than transportation alone, quietly helping to keep the power grid stable.