To all those people looking to cover power cuts with batteries

I'd have thought a 1ph 6kW would be sufficient for most?

However... the problem is not just the length of the power cut. It's the fact that it happens at all. A 1 second power cut is just as disruptive as a 1-hour one, in that all computer devices will reboot and may need hand-holding to get them to start cleanly.

A fast-acting, glitch-free UPS is probably needed in addition to any long-term solution such as a generator.

For several years we have had periods of 1-second power cuts in our village, thought to be caused by untrimmed overhanging branches touching high-voltage lines to our substation. They sometimes mean that Windows computers take ages to come back because they need to check and repair a "dirty" filesystem, and it often needs manual intervention to start our various wifi mesh nodes in the correct order so they all connect to each other (starting them simultaneously when power is restored often means one or more fails to reconnect). The mesh situation is a problem because it would need one UPS per node since they are dotted around the house.

Fortunately in the six years we've lived here, we've only had two long power cuts that lasted several hours. One was planned in advance; the other was as a result of a brown-out (I measured a mere 90 V at our sockets!) which stopped some devices but kept others going (switched-mode PSUs are great, even if means that they are operating at a much greater duty cycle when the input voltage is a lot lower).