Translations:PV system types/3/en
PV systems installed that have a grid connection are called grid-tied systems. The inverters that come with these types of systems are called interactive as they are capable of interacting with the grid by matching its voltage and frequency. They automatically shut down if they lose their connection to the grid in order to ensure the safety of any electrical workers that might be working to correct the issue. These systems therefore do not provide backup power in the case of a power outage. These systems cannot store energy, thus as the system produces energy, it must either be consumed on the premises or it will be fed back into the grid - through a meter - to be used by other customers. The majority of PV systems installed globally are of this type.