This is one of the reason's I'm delaying buying a gutter vac,.. I don't really like either option, though a generator would be the better of the 2 IMO.
I'm looking for a petrol powered vac of similar spec,.... no leads to worry about, prob not much heavier, possibly more powerful,...
There is one on the market which looks like a leaf blower mounted onto a wheelie bin, but it doesn't look too impressive to be honest.