Won't start, step funky, recliner slow, light blinks

Long title almost says it all. Was out working on the Enterprise today (like most days since I got her month ago). Was working on the toilet for a bit. Then my wife says the passenger chair won't recline right. It was trying but acting like it didn't have enough power...I put some lithium on it but it didn't help. Figured I'd look at it another day and started to leave but when I turned the automatic step on so it would retract when we left, it started going in and out in small increments. Then the light indicating the basement lights are on started flashing and light in the basement was flashing too. I unplugged from 110v to see if I could reset whatever was going on. Same on batteries. I decided I would try it on generator...same. I figured I would try to start the coach and see what happens...when I turned the key to the start position, there was a slow beeping sound and nothing happened. The coach would not turn over. Now I'm really getting nervous. All the battery indicators in the coach indicate between 13.5-14.1 volts. I went out to the battery compartment and put on meter on the two Chassis batteries that are tied together...they both measured 7v (is this right for a 12v battery? Since they are tied together that would be 7v each which would be 14v...so that sounds right???)

One of the things the manual indicated might be an issue is the "converter overheating". So I search and found that. It didn't seem to be too hot but there was a little stick on thing (see last Picture that said WFCO that had a blinking green light...the light was blinking fast and steady.

I'm at a loss. I've included a few pictures below just so you know what my coach looks like:










Ideas?