I am currently at a race with our 27RR with no hook ups. I have two deep cycle batteries and have been using the trailer since March with no issues.
Arrived two nights ago and used all battery power with the exception of using the generator a few times for the microwave.
Ran the ceiling vent almost continuously and after 24 hours the lights were dimming and panel showed batteries almost dead. Ran the generator for a few hours but as soon as I turned it off batteries were completely dead.
Being we are at the race I don't have a meter to check anything. All fuses look good. The new batteries had run dead last week but brought them up with shore power.
Anything else I can check? Where is the inverter located on my unit?
My power was out (a 26DBH) a few weeks ago. The breaker (under the am frame) had tripped and caused the same results you had.. Power when plugged into house or truck. Nothing on battery. A push of the little tiny plastic detent and I was in service.
Pat, Jen & Heather... Oh yeah and our trained attack trailer cat, Cinnamon
2015 ChevyHD D-Max
2014 Greywolf 26DBH
Look closely at your pic, at the breaker where the wires come together. There's a small black button you may need to push in. I can see it when I zoom in where back and red wire is connected.
Edit. Meant black wire.
2014 Roo 23SS
2013 GM Sierra CC
Prodigy P3 Brake Controller
Nites Camped 2016 -25