Enjoying the discussion, I understand why FWC uses the sure power separator. It is plug and play for the buyer, however as this thread point out not always the best. I noticed that sometimes my camper batteries were not all the way charged after driving. My truck still had the old solenoid under the hood from my 2002 Hawk. I just removed the sure power separator and use the solenoid. I know if my truck is running I am charging the camper.
Any down side to this? Also I like the idea of the two gages to be sure your are connected. I might put them in my truck cab. I would thing this is a better location. If you are driving down the road and for some reason the sure power disconnects you could not see the indicator in the camper until you arrived at your camp.