LifePo4

I feel the same way. What model did you get?

It should not affect anything else. The trailer battery will work the emergency disconnect. Your solar should be sufficient as you say. For those of us who don't live in places with abundant sunshine, having the ability to charge while driving is important, especially if one goes to places where one can only run generators for very limited hours.

A lot depends on the vehicle. With the Nissan Frontier, using the 7-way meant that the trailer battery was being discharged while driving instead of being charged. I had to run a dedicated power circuit to a DC to DC charger in order to charge the battery while driving. I have not been able to test whether the Ford F-150 behaves similarly. I already ran the dedicated charging circuit in the truck but have not had the chance to hook it up. I will do that before leaving on any long trips.

Thanks.  We are picking up our new trailer Thursday and it is compatible with LI batteries, I was just concerned with the battery draining during transit when connected to the 7-pin.  I tested my truck and believe it is not a “smart” alternator but need to confirm with Dodge this week.  I will eventually run a dedicated run with a DC-DC charger but we already had a trip planned before we pulled the trigger on the new trailer and I only have a few evenings to swap the batteries, go through and check/tighten all the plumbing and electrical and pack it for the trip, so not sure I want to ad that to the list before we leave. 

Originally posted by EchoGale One more update: I've been traveling for ten days without access to electrical hookup. I couldn't be happier with my new batter set up. I went with the Renogy 100AH despite the price.  One at the higher price was fine (I needed batteries so I was going to spend 2-300 anyway so 475 wasn't much more)-- but I was afraid I'd decide to add a second and that would have been too much. As it turns out the new camper's rooftop solar panels easily top off the daily usage (which is only about 15%)--even on this stretch of rainy days we've had on the east coast. I definitely don't need a second battery. Such an upgrade from my old system: 2 golf cart batteries (heavy!) where I was always pulling to boxes apart to chef the charge level and hauling around my heavy portable solar panel to keep them charged up...not to mention maintenance.  It's a sweet setup. Thanks again for the advice while I was figuring it out.  :)