German company, Sonnen offers home batteries systems with in-built intelligence, Sonnen energy systems not only store solar energy for later use, but also have the potential for selling power to other Sonnen users across the grid.

Sonnen says its intelligent software can work out when certain appliances can run at home. Users can also configure the system with a smartphone app.

With the added Sonnen Protect unit, the system can sense power outages in real-time and automatically switch over to battery power.  In a blackout, you could be the only house in the street with power.