An electrochemical energy storage device with a photovoltaic system is intended as a means of shifting or transferring power generation to periods of consumption or peak consumption periods to power generation periods.
For this purpose, existent and available (solar) energy must be generated and subsequently stored so that it can be used in times of energy demand. The most important objectives of an electrochemical energy storage device are therefore:
To increase own or private consumption
To ensure dependable supply through backup power