When you say your battery reads "Good" what meter are you using. The battery meter that came with your rig is practically worthless and if your using that as a basis for your concern then stop.
Further - unless your converter has been changed/upgraded you likely have an old Magnatek which are lousy - slow to charge batteries. Also - what type of battery did you install - your rig probably came with a type 24 battery which is pretty small and good for about 3 or 4 days of dry camping.
Not sure - but it's possible that things are working as designed.
