@Rosie222 It's pretty much at your discretion whether to extend a partial refund. If the guests were good sports, you could offer a small rebate (say, 10% for the affected nights) as a goodwill gesture. But despite the inconvenient power loss, the guests were pretty fortunate to have a warm, cozy holiday home with a fireplace throughout a nasty widespread storm. I can hardly think of a nicer way to have spent the weekend, all things considered, so a refund is definitely not necessary.