Did you set your alde system to run on propane? And on the next page set it up to prioritize the propane verses electric. There are two settings in the Alde Panel for heat?
Yes, I realized on this latest trip that the preferred was electric so i was not even running on propane. the electric killed the battery half through the night. This year I turned off the electric when turning on the propane and battery never fell below 76% with heat running.