Apparently I got my house and chassis batteries confused. Both with Aladdin and physically. I assumed that the last battery bay would be the chassis batteries. After comparing to Aladdin data, it appears that the last battery bay is house batteries 2 and the top shelf of the next battery battery bat is house. Aladdin was showing 13v for house and 10.2 for chassis. These numbers agreed when i checked the batteries themselves.
I went ahead and replaced the chassis batteries. They now show roughly 12.9v. I was able to start the generator, but as yet not been able to start the engine. I'm wondering if I blew a fuse somewhere.
A couple of other data points, as follows: a) when I checked Aladdin chassis battery before attempting to start, the batteries showed 12.9 volts. After starting the generator, the chassis batteries show 0 volts when the generator is on. This made me think that I possibly don't have the charge controller settings. I did adjust the charger setting and made sure it was on and set to charge float.
(b) When I attempt to start the engine, I noticed a strange behavior in Aladdin. Aladdin acts like it is shutting down when I attempt to start. I don't recall this happening before.
If you have any thoughts about what to check next, it would be greatly appreciated!