Battery Issue/ Need advice
One year old 27.1 Ace motorhome. Plugged into 30 amp service at my home. Had an issue with the house battery boiling over, had that battery replaced, when it showed it was not charging. Tested the battery while plugged in to 30 amp service and it is charging, and is charging while the motor is running. However, the battery that starts the motorhome will not stay charged. I took it to the Ford dealer and they replaced the starting battery. I drove it about 110 miles, came home plugged it in, and placed the switch to storage, and locked it up. 1 month later, the starting battery is dead. House battery is fully charged. Any idea what could be killing the starting battery, had to jump start it! ?