Our T@B is having a problem with the voltage on the less than 1 year old, group 24 battery slowly dropping. When I first noticed this problem I took the battery out and fully charged it and it measured 12.6 volts out of the T@B with no load with a voltmeter. I installed the battery back into the T@B and after turning on the cut off switch I can see that the voltage slowly drops using a voltmeter. We've had our T@B since April so the battery is not that old. I also took the battery into an auto parts store and had them use their equipment to check it out. I am assuming that the equipment the auto parts store used puts a load on the battery and the battery tested good.
Our last trip with the trailer was in mid-October and we had full hook ups. I noticed the problem recently because I installed an antenna booster for our inside television and was checking the battery voltage as a habit. That was when the meter inside the T@B measured 11.9 volts and I became concerned. I have since disconnected the antenna booster and also unplugged the televisions. Any ideas on what the next troubleshooting step I should take? The trailer is in a storage yard so I do not have access to electricity but might be my next step to hook up to shore power. I'm not sure what that would eliminate as possible causes if it works or doesn't work.
Chris and Alexis-- Roseville, California--2017 T@B CS-S--Toyota 4Runner