Batteries drop below 100% even when on shore power?

[Jimnkarens]

I have installed new AGM batteries, (800aH) a new 3000w inverter and a Bogart battery monitor.
Even when plugged into shore power, my battery monitor shows that my battery capacity is varying between 95-100% of full capacity. I assumed that while on shore power that I would not be using any battery power and that they would stay at 100% until I disconnect shore power allowing the inverter to draw on the batteries.
Anyone have any idea why this is occuring?

thanks,

Jim

 

[mlpeloquin]

Are you sure that the output of the inverter is disconnected? Do you have a kill switch for the 12V going to the inverter, if so, start by turning it off manually.