FWIW, we use our generator whenever needed because we don't drycamp in populated areas if we can help it.
We most often use our generator out in the desert heat away from everyone. We used it almost all night once in order to sleep in the Southern U.S. in extreme August heat and humidity. Solar would do us very little good either because we rarely stay in one place more than 2-3 days and the engine alternator brings up the coach battery bank nicely driving between camping spots.
A generator is priceless when you wish you had one along. Not worth anything when you don't need it ... just like insurance. :)