I just came back in from doing some last minute grocery shopping and looking the towers on the way home got me wondering if things are different in the US regarding backup power for cell sites. I got the impression from Reno's post that where he is they all have gen sets.

It doesn't appear to be a requirement in Manitoba/Canada. None of the standalone ones I pass each day have any connection to the natural gas mains to power a Generac type set.

There was only one that I saw that had a pin & sleeve connector on the wall for external power and that was near the local fire hall.