I would NOT go with the electric PH II
The manual version is a fine toilet--consistently rated the best manual toilet under $500...but all the motor does is replace the pump handle...it pump the toilet much faster and with a much shorter stroke, wearing out seals much faster and making the toilet easier to clog. IMO it turns an outstanding manual toilet into a very poor excuse for an electric toilet--one of the few things that Raritan makes that I don't like or consider a good value.Their SeaEra electric macerating toilet, otoh, is an outstanding value and an excellent product. It's available as either a complete toilet or a conversion kit, and both are available in sea water pump or fresh water flush models.Check it out on the Raritan website at http://www.raritaneng.com