For safety reasons, all inverters shut down in the event of a power failure. This is so energy produced by your solar array doesn’t travel back to the grid and potentially hurt someone working on the powerlines. There is also the issue that in the event of a power cut, the ground supply from the grid cannot be relied upon. However, we can setup systems with a special EPS (Emergency Power Supply) mode, which will allow usage even during a power failure. There is additional safety measures that need to be installed, along with a separate earth. Get in touch if you wish to learn more.