Maintaining charge in CMAX hybrid 12V Batter while toad.

[dynnek]

I have a 2014 Ford CMax as a dinghy behind my F250/camper and the 12 volt battery goes dead if a travel a long distance. Im told a Toad Charger that will provide continuous charge to the battery and keep in charged. The F250 has a charging line built in. Problem is can the CMax take a Battery Charge connector and how to set it up as I can't see battery connectors. Ford just tells me to stop every 6 hours and run the gas engine.

[musicmaestra]

I have a 2013 CMAX sel hybrid that I tow behind my 33' Tiffin Class A motorhome. My RV shop installed a charge line from the rv to the CMAX and I have never had a dead battery. HOWEVER, my CMAX is accruing miles as I tow it ........ over 10,000 on my trip cross country last fall. Does yours accrue miles? Ford says this is normal. I say it it is not!