Bill and Jan Moeller have lived a mobile lifestyle for more than 20 years, during which they have had much experience overcoming problems with and upgrading their 12- and 120-volt electrical systems. At present, as they have done for many years, the Moellers live fulltime in their fifth-wheel trailer and travel the year round. In addition to writing books, including "RVing Basics" (Ragged Mountain Press, 1995), the Moellers also write a nationally syndicated newspaper column about RVing.