Hello Richard and
We are glad to have you join us here and we look forward to reading of your adventures and experiences. Congratulations on the new to you Beaver. I am sure you will enjoy the website and forums. Good luck, stay safe and keep us posted.
More than likely you have a bad cell in the house battery. I would suggest you have all of them checked out and if need be invest in a new set for the house side of things. In order to keep the chassis battery(s) charged the one design the Beaver has is the use of the Echo charger. If you remove it, the chassis battery will only get charged with the drive engine running.
Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7