Some electric cars can be used as a home battery, allowing them to return stored electricity back to the power grid from their battery. This process is known as “vehicle-to-grid” (V2G).

Currently, several manufacturers offer V2G functionality on their electric models, but it is important to note that not all electric cars come standard with this feature.

One of the most well-known models that supports V2G is the Nissan LEAF. Some versions of the LEAF have V2G capabilities, allowing the car's battery to be used to supply energy back to the power grid.

Other car manufacturers, such as Hyundai and Kia, are also working on V2G technology and offer the capability to use their electric vehicles as home batteries.

However, it is important to note that using an electric car as a home battery depends on various factors, including the specific functionality of the vehicle, the charging infrastructure, and the energy management systems in your home. It is advisable to contact the car manufacturer or a certified installer for specific information and advice on using an electric car as a home battery.