Got more time this morning, so a bit more info?
I might assume the transfer switch to be okay but do check.
This is the drawing of your 110AC feed to show how it fits together.
Click this snip to get a better view.
Your power comes from the cord OR the generator to the transfer switch. That switch decides which is active and passes it on to the main 30 amp breaker at the load center.
That main breaker then feeds the power to all the smaller sub-breakers and an easy one to check to make sure it is getting there and past, is the microwave as it often has lights we can look at real easy.
If the microwave has lights, then we can know the cord or generator,transfer switch and breakers are all ok!
But the battery charging is a different issue. On the newer RV, we do not get the really deep wiring info, so some guessing is needed!
It shows you have an inverter and that usually only uses battery to make 110AC. But we know there has to be a charger of some sort and they may be cutting corners on what the inverter does. It may actually be an inverter/charger as a multi-function unit!
If you have a set of manuals with the RV, it may have a small book that would tell more about that item.
So I would suggest flipping the breaker for the inverter (maybe charger?) off and on to see if it helps. Sometimes the breaker flips but doesn't look tripped, so try making sure it is on?
Whoops! Found something!
Nothing found on how it is wired in but this says it does also do the charging, so it needs checked to make sure it is on, plugged in if a cord on it and no GFCI or breaker on that unit, etc.