Non Emergent General Questions

You can't expect to be able to run everything at the same time on the 30 amp main service.

As an example. Your microwave is going to pull around 8 amps, the water heater probably another 8 amps, the fridge around 2 amps and the converter (depending on the battery load) anywhere from a few hundred milliamps to almost 6 amps. Those alone are a "potential" of almost 24 amps.

Now start up your air conditioning and the start current for that is probably at least 20 amps. You're now at 44 amps. That is more than can be sustained. Once the air conditioner is started, it will probably drop to 10 amps (or so), for a total of 34 amps (but still over your 30 amp limit).

The good news is that all those things should not be happening at the same time. For example, your batteries when you're on shore power are probably mostly charged, so the converter is probably only a couple hundred milliamps. The microwave does not run constantly, and so on.

The elctrical gurus have already taken care of your first question.  We keep our slide in on our 2011 177 which is not near as tight of a seal as the newer pods, in fact I will take an old t-shirt of mine to close up a few small openings near the middle of the under part of the slide to keep the mosquitoes out, very important thing to do if in northern Michigan or other similar parts of the country.  I don't believe this would ever be a problem on the newer pods as they are superior in their seal around the slide.  As others have already noted, keep slide in to reduce the potential of any unwanted varmints taking up residence over the winter months.  For added security we always throw a couple dryer sheets on both ends of the pod before storing in our old horse barn.

Hopefully you don't have the original mattress that comes with the pod, we threw ours out, actually put it on Craigs List as a freebie and got rid of it within the day.  We would have felt guilty charging someone to take that off our hands.  Replaced it with an 8" Eurotop from Camping World back in 2011.  We use our camper a lot and that mattress is still as firm and comfy as the day we got it. 

I don't need an electrician, I know what my loads are, I've measured them. My max combined load is well in excess of my 200A service, yet I never trip my main in normal use. If I did what you're doing in your pod and turned everything on at once (stove, water heater, air handler heat strips, dryer, lights, microwave, etc etc) I would trip, and I'd be surprised if that wasn't the case for most folks. Many household loads just won't be on at the same time. The NEC Article 220 has a section for determining service size based on planned loads. it allows reductions based on load diversity (demand factors). Article 551 (the one covering RV's) allows for that too.  

If you want to learn more about circuit breaker time-current curves check this square d video out. For a typical thermal-magnetic breaker to trip after 30 minutes you ought to be running pretty close to but over the 30A rating.   There is a whole electrical engineering specialty called overcurrent protection coordination that deals with proper breaker trip sequencing on a circuit, and goes into the cb's time-current curves in detail to be sure that the breakers trip in the proper sequence. Generally the most downstream one should trip first, which is what is happening in this case.