I believe your unit has separate 'vehicle' and 'house' batteries; one to start your engine, the other to run DC appliances etc. while you are stopped.
One plan might be to stay where you had electrical service for a day, or overnight, (to charge the 'house' battery) and plan on a long drive to be sure the 'vehicle' battery is fully charged. Having both batteries fully charged may correct whatever issues you are encountering.
Your other post said you had starting problems earlier. It seems a stop at Jayco dealer would be a good idea, too, to have the two systems checked.
Sherm & Terry w/rescues Steve (std Poodle) & Eydie (min Schnauzer)
2015 Jay Flight 27RLS (Camped: 102 nights 2015, 90 nights 2016)
2006 Ford F350 6.0 PSD, Lariat, 4WD, CC, LB, SRW, auto., Camper pkg.