Reuters: A consortium of French companies led by construction firm Bouygues has developed an electric car charging system based on old batteries that helps smooth out power demand when dozens of cars simultaneously recharge.
A typical charging station of the popular Paris Autolib self-service rental cars has four to five charging plugs, which each make no more demand on the power grid than an average home.
But imagine a firm or institution where dozens of employees arrive in the morning and all start...