Soleis AG has developed two storage systems with capacities of 1 kWh and 2 kWh.

The new Minitower1 battery system from Soleis AG stores solar energy from the photovoltaic modules of the balcony.

Throughout the day, the solar panels power the apartment's base load and store excess energy in a storage system. At night, the battery discharges energy into the home network with an output adjustable between 30 W and 270 W.

Two photovoltaic modules can be connected to the storage tank to charge the battery. Additional modules can be connected via another connection. However, they don't charge the battery -- instead, they bypass the battery and supply power directly to the home network. This ensures that the batteries in the power storage unit are charged and that the home's base loads are covered by solar energy even when there is little solar radiation.

The connection between the tank and the home network is made through a socket or plug. These batteries are about the size of a home computer and come in 1 kWh and 2 kWh versions.