I'm not sure if you maybe meant this for some other post, but if you did mean this, there aren't that many other atmospheres in the solar system where there is A: a surface that B: any sort of machine can be on (sorry Venus) and C: has a charged massive object moving. (I don't list atmosphere explicitly but C essentially requires it; it's not going to happen in a vacuum.) We're down to Mars and Titan, basically.

Mars is an interesting question; how charged are those sand storms? It might pose the opposite problem of excessive power density!

Titan I just don't know, but I wouldn't be surprised there's some sort of charge flowing around, it's just a question of how much. Charge is pretty fundamental to mass, after all, and when things get moving it's not that hard to end up with static electricity to at least some degree.