KMG, I have been looking for a way to charge my battery bank while on the road. I am going with an AGM set up and portable solar panel because I live in Oregon and most spots are too shady to rely on all day sun so chasing sun spots are as good as it gets at times. Since I am mixing batteries, AGM and wet cell, I have heard that trying to charge both off an alternator will shorten the AGM's life. I'm not sure about that but the C-TEC system sounds like a good way to keep the charge tailored to the AGM bank. How is it working for you? Have you tried powering it from the inverter? I park in sites with electric hook ups a lot so I can charge it on 110 on the rainy days here. Is the charger you using set up for 12 volt or an adapter, or are you using two separate chargers? The rig sounds just like what I need up here. Thanks.