For example, when there is a storm that suddenly results in an abundance of windgenerated electricity the balance between supply and demand is lost. This causes an overload on the public power grid. A virtual storage consisting of thousands of sonnenBatteries can store huge amounts of excess energy for later use within a matter of seconds. This takes the strain of the public power grid and keeps its operation stable.
Members of the sonnenCommunity can now use their sonnenBatterie to become part of such a battery pool by providing a small share of their individual storage for the public power grid. As a financial compensation, they can get the sonnenFlat for 0 € energy cost (within the limits of the sonnenFlat-rate*). You will not even notice that you are sharing your energy storage with the sonnenCommunity because your sonnenBatterie will only be used a couple of minutes each week to buffer short-term peaks in the power grid. With the sonnenFlat, storing electricity becomes even more economical for the individual. A household will save 100 % of its energy costs1. At the same time, the general public also profits from this technology because it negates the need to expand the public power grid. When you register for the sonnenFlat you will receive the sonnenFlat-Box by your postal service. Just plug the box into any socket in your home and you‘re done! It‘s really that simple to start into your energy future.