Energy storage batteries for photovoltaic systems are engineered in order to store the energy prodced during the daytime by a photovoltaic plant. Therfore, the energy stored in these batteries, is available to be utilised at night, when a photovoltaic system does not produce any energy.
The aim of the storage is to allow end users to be independent for an energetic point of view. Such thing is not achievable just by installing a photovoltaic sytem, which is obviously affected by the presence of the sun.
Hence, this type of installations, make the solar energy available for consuption at any time of the day!
In order to obtain independence from the national energy network, the battery absorbs the energy produced during the daytime by the photovltaic system and stores it, until it is needed at night.