If it just came out of storage, be sure the battery is FULLY CHARGED!
Be prepared for a cold evening and night. Bundle up so everyone enjoys the evening and sleeps comfortably. Your battery should be OK for the furnace and fan to warm up the trailer in the morning. One battery probably will not have enough capacity to run the furnace in the evening, during the night, and the next morning.
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.