you need to tell us if you have Popup Gizmos(PUGs) or the generic solar blankets(also known as all-weather/sportsmen/solar blankets) for on top of the canvas ends.
second, have you gotten Reflectix to put in the tent widows?
with both of these two mods, which are the #1 and #2 hybrid mods, you should be fine with the 13.5k a/c.
and Zoe the Wonder Dog(R.I.P.)
'07 Roo 23SS pushing an '07 Chevy Avalanche
Equalizer WDH and Prodigy BC