Tammy:
Get the Progressive Industries HW-50C Electrical Management System. I know that this is expensive, but just consider it expensive electrical equipment insurance.
we do have that system wired in plus a surge protector plug in at the pole. Still lost the 2 TV 's since wired in, but hadnt replaced the microwave at that time to know if it would have taken them too or not. They dont want to warranty anything. We went thru this the first time. The trailer company did replace few things the first time out of good faith. I went thru several heated calls with Heartland trying to get them to cover a tech to check out the wiring. The tech couldnt find anything on site but said it would need a thorough in house check. Which warranty wouldnt pay for.