How efficient are solar power storage systems?

(Karlsruher Institut für Technologie (KIT) ) More and more photovoltaic systems are equipped with batteries that store power produced during sunshine for later use. Such solar power storage systems enable operators to use a maximum fraction of the solar power produced for own purposes. The more efficient the storage system is, the higher is the economic profit. The 'Testbench' project enhances the quality of efficiency measurements for better comparison of battery systems by planners and operat...