If you plan to get an AGM battery(s), get rid of your low-end (read cheapo) 3-stage WFCO converter/charger, especially if relocating the battery inside and if you leave the converter connected to the battery over the winter.
The WFCO converter in our KZ TT died in the 3rd season after waiting until we were far from home on a long trip. Woke up one morning to the propane alarm sounding (due to low battery), a burning plastic smell and then found the WFCO breaker had tripped. Turns out the battery was also dead and had a shorted cell.
I've read some say that the WFCO converters are junk and now know why. So I upgraded our TT to an AGM battery and a high quality, robust, US-made, Progressive Dynamics 4-stage converter to take good care of it.
Luckily there was a NAPA nearby to get the battery and we got Bestconverter.com to courier the new converter to the next CG a couple of days away. Had been wanting to get an AGM & PD converter for a number of years anyway and seized the moment - easy upsell to DW so it all had a happy ending. :)
Venting from under the bed may be a bit of work to get the vent hose to the exterior wall. From what I understand, the exterior grill should be min. 6" above the sealed container. In a previous KZ TT, I relocated the battery to inside the pass-through at the forward side and ran the vent hose up in the wall cavity and at the end of the cubby-hole beside the bed. MTS Products has a good sealed battery box, hose and vent/cone.
