comments:
I think it's safe to say "all" rather than pretty much all. If there is one that doesn't have them, I haven't seen it yet. "Windings" on an inverter generator are a completely different thing than on a synch generator. https://www.amazon.com/Tapa-Freight-Predator-Inverter-Generator/dp/B0B6QZ7H99/ The whole gen head only weighs 11 lbs. and maybe there is a lb. of copper in there. There is zero copper in the permanent magnet rotor and the alternator coils consist of a few small turns of thick wire and not miles of thin wire. So there are no real savings to be had by using non-copper wire. I find it hard to believe that the maintenance on a Champion is significantly different or better than on the Duromax. These gens all seem to have rather similar designs. In the case of a closed frame inverter gen, you need to cram all that stuff into a compact case so I don't think any of them are particularly easy to work on.