Not sure. I use mine on a kamado bbq. What ever you use it on needs to have inlet vents that you can block and fill with the fan so it's now regulating your air intake and out let vents that you can adjust. What type of vents does your kettle have?
It has vents but they're not easy to attach something to. From a bit more reading up it's awkward to use with a weber kettle and the recommended method of installation is to drill a hole in it.
Cheers all. The thermoworks and billows is what I was thinking about.
They seem good for smokers but I've seen less mention of them for kettle barbecues.