Fermata Energy’s FE-15 bi-directional charger in a commercial use case. | Image: Nissan Nissan has approved the first bidirectional charging system for use with its all-electric Leaf vehicle in the US. The FE-15 charger by Fermata Energy, which can power homes using the EV’s battery, charge it, and send stored energy back to the grid, is the first system of its kind to earn UL 9741 certification for bidirectional charging solutions. Back in 2012, Nissan promised its maybe soon-to-be-discontinued EV would eventually share its stored battery power back to your home or the grid during peak hours or even in emergencies.