I successfully claimed back for a fridge freezer full of food once but that was after a 3 day outage. As far as i'm aware they're under no obligation to do that as it was caused by an act of god (Hurricane) and it was merely a gesture of good will.
This was UK based btw.
You can claim for an extended outage, or repeated outages:
How long did the power stay off for?
If the power cut is caused by a fault on the network, you may be entitled to a compensation payment if it:
- lasts for longer than 18 hours in normal weather where the power cut affects less than 5000 homes
- lasts for longer than 24 hours in normal weather where the power cut affects more than 5000 homes
- lasts for 24-48 hours in severe weather and
- is the distributor’s fault.
The amount you can get will be based on how long the power was off.
How many power cuts have you had?
If your power goes off more than four times a year, and for more than three hours each time, you may be entitled to a compensation payment. This will apply if the power cuts were the electricity distributor’s fault and it doesn’t matter whether the cuts were planned or not. The amount you can get will be based on how long the power was off for.