cruz-in wrote:
I think the point is two fold:
1) When driving the TV/TT combo, current will flow from the higher voltage LI battery (assuming it is fully charged) to the lower voltage Lead Acid system.
2) Having a DC to DC charger for the LI batteries will allow the TV to charge the LI batteries (albeit in limited fashion) when traveling down the road.
1. The resting voltage of a full 12v Battleborn is about 13v and it wants 14.4v for bulk charging, 13.2 for float if I have that right. So when can the TT battery be higher in voltage?
Any alternator charging will be above that 13v, starting at 14.x when the vehicle engine is turned on and tapering quickly to 13.8 or so soon after, once the alternator warms up and the vehicle battery is recharged.
When parked, if the TV is a Chev, just disconnect the 7-pin. With a Ford you have the relay, so no worries.
2. You just want one of those DC-DC gizmos! (And why not?) :)
