Energy storage is a particularly effective way to increase your energy autonomy. During the summer, daytime power production often exceeds the demand at any given time. In a standard installation, the excess is sent to the grid and the prosumer can collect it later. However, the grid owner takes 20–30% of the energy received. Whereas installations equipped with an energy storage system, redirect the electricity straight to the batteries, and the installation owner does not lose any kilowatts produced.

Owners of inverters with UPS or ESS function are also protected against power outages. The inverter will switch to emergency power mode and begin drawing power from the charged batteries. The prosumer will therefore be able to use electrical appliances despite the lack of electricity in the area.

Achieving full energy independence under current technical conditions is justified in places where there is no power grid. The optimal solution is to increase self-consumption in on-grid installations by using batteries.