Power and outages on a rural line
Starlink does not run during a power outage unless the router and dish have backup power. That matters more on a long rural feeder than in town, and it matters most if the house relies on internet for work, alarms, or calls over Wi-Fi.
This guide does not give a watt figure or size a battery. The kit Starlink offers at your address determines the draw, and that is listed with the hardware specs. If you want the internet to stay up during outages, read those specs first and then look at backup power as its own project. Backup Power Lab is a separate Canadian guide for that.
After an outage, if service does not come back on its own, Starlink’s troubleshooting order is: check the app for alerts, check that cables are secure and undamaged, confirm you are at the service address, then power cycle.