I haven't used Generac, but i have experience with solar generators.
I've divorced, and moved to another house. In new place there are troubles with electricity, that's why i decided to buy generator. On one of forums i was advised to buy a solar generator. I like all eco-things, so that decision was easy for me. It's just pleasant to understand, that you doing nothing harmful to environment, especially in front of your own nose)
I understand, that solar generators have lower capacity of batteries and lower output power, but for me it's good option. In my house electricity can disappear for 4-5 hours, all the time i work at home (i'm designer), so i use my generator actively and it hasn't let me down yet. So think about it, may be it'll be good for you too.
This
overview will be useful if you decide to buy solar generator, there are 9 of them completely described with all pros and cons stuff.
I chose
Rockpalls 300W, and i'm a lucky duck with it!