Buy a Surge Protector!

There are many things a new RVer has to buy when they first get an RV.  The most important one IMHO is a surge protector.

These things are filled with electronics, from TVs to stereos to what have you.  You connect them to power and God only knows what can happen.  A surge protector will protect your electronics from surges and (if expensive enough) drops in voltage.

There seem to be two brands out there, one with a lifetime warranty.  Progressive Industries sells both 30 and 50 amp surge protectors and Electronic Management Systems.  The PT50C is a 50 amp EMS.  That's the one I picked.