ntelli power 9000/9100 to Replace Atwood 55 Amp Converter

Yes you can replace that Atwood with a PD converter and Charge Wizard or Pendant.

Or you can do the same thing with a PowerMax unit. They also offer a choice of deck mount , lower-portion only replacement of the charger, or replace the whole power centre with a 60amper included:

http://www.bestconverter.com/PowerMax-Boondocker-Converters-_c_154.html

http://www.bestconverter.com/Boondocker-Main-Board-Assembly-for-WFCO-8955_c_196.html