The only thing that catches my eye and you may have all of that covered but it looks like you may need some positive (forced) air flow around the PROSINE unit...
Looks a bit tight to me around the PROSINE... Running the full 2000WATTS will want to draw 162AMPS DC CURRENT plus loses from the batteries. You will be taxing the 800AH plus 12VDC battery capacity pretty good. Might be some heat build-up in the small enclosed compartments I see there... You might comment on the cable size of the cables going to the battery terminals as well.. From the photo they don't seem to be all that large...
Otherwise a great install... Love the remote panel option...
Roy Ken
