Fortunately I have not had any issues, except for a faulty starter solenoid. It took a while to track that down, but once I replaced that, it's been fine. I don't have many miles on it, though. Do you have a manual for it? There's a free download of a manual here on this site if you need it.
If yours is the same as mine, you have the digital display. If you toggle through the options using the button on the right side of the display, you can see what the voltage output is while it's running. Mine has never been higher than 15V, and that's usually right after I start it. After that it's in the 14's. Obviously something is wrong somewhere if it keeps burning up voltage regulators. I would check any grounds I could find, and clean them and coat them with some dielectric grease.