Not that you'd want to run any modern electronics on it (you want sin wave for that)
That sort of generator (permanent magnet, synchronous) produces sine wave.
It's
inverters that produce modified square wave.
I have a Honeywell HW2000i inverter generator. I bought it for the 2000w continuous rating since I was planning to install a/c in the camper. I never did install a/c. Honeywell is now out of business, taken over by Generac. My gen has a problem, and Generac told me they are sending me a new Generac ix2000 as a replacement.
If I had to do it over again today, I would buy a Champion, which has a really good rep over on the RV forums. Champion now has an inverter generator, which runs $499, but I think is on sale at Costco right now for $399:
http://cpeauto.com/73531i.php
For simple battery charging however, that isn't really needed. If I was to buy a small gen just for battery charging, I'd likely go with the 80cc Champion synchronous for $200:
[ame="http://www.amazon.com/Champion-Equipment-42433-Generator-Compliant/dp/B0028VB6XO/ref=sr_1_11?s=hi&ie=UTF8&qid=1300819794&sr=1-11"]Amazon.com: Champion Power Equipment 42433 1,500 Watt 80cc 4-Stroke OHV Gas Powered Portable Generator (CARB Compliant): Home Improvement[/ame]
However, I would not buy it from Amazon. I bought my Honeywell from them and then discovered that once you put in fuel and oil they won't take a product back because of "hazardous" shipping issues. I'll never buy another engine powered product from Amazon because of that.