Nissan’s New Roof System Can Recharge an EV Using the Sun

Nissan wants to redefine the solar car with its new Ao Sora EV concept, a prototype unveiled ahead of its official presentation at the 2025 Japan Mobility Show. The idea: to use an extendable solar roof capable of capturing more light and recharging the battery without a cable or charging station.

A solar roof that extends like a surfboard
The system, tested on a modified electric Nissan Sakura, consists of a roof covered with photovoltaic cells and a sliding panel that extends forward, like a diving board. This device doubles the solar capture area, thereby increasing the amount of clean energy recovered.

According to Nissan, the technology could add up to 3,000 km of range per year, depending on the sunlight. The concept's name also plays on this idea. Ao Sora means blue sky in Japanese—a nod to the importance of the sun for the system's operation.

A roof that recharges and... protects the car from the sun
In addition to recharging the battery, the extendable panel acts as a sunshade when deployed. This natural shade helps keep the cabin cooler, thus reducing the use of A/C and the vehicle's energy consumption.

Clean energy, but a few compromises
The technology has its challenges. The panels add about 30 kg (66 lb) to the car and slightly hinder its aerodynamics, which reduces the Sakura's maximum range (estimated at 180 km per full charge). But Nissan believes the annual energy gains largely offset the drawbacks, allowing for near-daily use without plugging in, particularly for short urban trips.

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