Why are you avoiding Amazon intentionally? Not second-guessing you... just curious.
I think I bought everything we used from amazon because shipping from anywhere else was too expensive.
Its hard to say if youre setup is plausible because I dont know how many panels youre using or what inverter. When I pull up the inverter site it doesnt tell me which one you were looking at, just that it comes in 4 sizes and for me to pick one.
I gotta be honest the inverter looks like cheap chinesium. I dont know anything about that company. If you do then go with that...but if you dont either then maybe keep looking. I would be scared to death to put any of those inverters in my bus. The only other thing I know about inverters thats useful is, if you are going to run electronics (like computers, laptops, tvs, gaming ) you need a pure sine inverter. If youre never going to want to run anything like that then its not worth paying the extra.
Renogy is a good brand I think for charge controllers.
For the one with the 10amp rating you can only run 120 watts max at 12v or 240 watts max at 24v, but the panel youve shown is 320 watt. If you are sold on that panel then you will need either a 30 amp charge controller (at 12v) or a 15 amp (if you go 24v).
You should know that PPT controllers are considered older technology and arent as efficient as the new MPT controllers. Its a concern but I ended up going with PPT because they are so much cheaper and then just bought an extra panel to make up for it. If space becomes an issue I can always swap it out since they are only like 20 bucks for a 60 amp (thats what I used).
I didnt see a battery. You must have a battery for the charge controller to work. I see that you want to run your batteries in a series....so youre going from 2 6v batteries to step up to 12v? or two 12v batteries to step up to 24v? either way is fine.
A 10amp fuse in between the panels and the controllers is also a good idea. I use this resettable 60 amp fuse
I would also put a fuse in between the batteries and the inverter. A kill switch would be a good idea as well.