Wood Fired Rayburn

[Tarrel]

If you've got a grid connected system it will shut down completely in the event of a power cut. The inverter that turns your solar power into mains electricity will have an "Islanding" device fitted. This si to prevent you feeding power into the grid while technicians are working on the cause of the failure.

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If you want back-up power in the event of a power cut, you'll need a battery-bank charged from the mains via a battery charger, which you can connect an inverter to, to provide power for your essentials when the power goes down. This is why I'm going for a DIY grid-connected system, so I can configure it so it could easily be re-wired to run a separate inverter during a prolonged power-outage.