Kw t680 apu install tripac evo charging problem?

Alright this crap has had me stumped for the longest time since i got this tripac, volt reads 13.8 on inverter and truck volt gauge but why does the battery charge main keeps going down...i dont get it please i hope someone can shed some light cause im done trying to figure it out my self. Kw dealer are idiots also thermo king...and always want u to bring the crap in so u can pay up...

 

The battery charge main keeps going down slowly, i sat for 2 days with full ac and not start truck up and when i had to it started fine but the % was down to 51...i re-did the terminals twice and both times what ever number it was at it went back to 99% so im clueless on what that crap gauge is for...

 

The gauge im talking about is on the truck it self it shows the percentage of what state the batterys are in. At 60% if i have autostart enabled the truck would start up and run for like 2hrs then shut back off but i havent really the need for it since before the apu i always idled ans now i have the apu for ac. The apu i usually have it on a/c the whole time. Before i disconnected the batterys yesterday the percent was around 93 and when all done reconnecting them after i cleaned them the % was showing 99...

 

Well the state of charge on mine just keeps going down. I sat for 2 days and it fell to 51% it started fine but really...batterys are but a year old. Got this truck in November with 1.1k miles on it. Even at 51 it started fine but took awhile to get it to 100%

 

If i disconnected tge battery terminals that number would go to 99% its done it twice cause i didnt know to not put dielectric grease between the terminals so i cleaned them off and put only on top

 

Also about if its setup if the batterys get low..u know how hot it is out here? Lol ac stays on it should charge while its on.