Hi purple.  I  occasionally have it switched off for hours for some sort of maintenance.  I always fill a thermos with coffee, turn the electric blanket onto 3 beforehand as a desperation backup  I am lucky that I use cylinder gas for heat.  I only need power to click it on and make sure it is on before I lose power.

However, a good time to go into town and do shopping, or meet friends for coffee.

If you use a pc router make sure it is switched off.  I didn't last time and mine fried in spite of having surge protection.  Go figure.