Travel Trailer AC Weak ~ Heartland Wilderness ~ Any others?

I own a 2014 Heartland Wilderness 2775RB the AC will cool the TT down but could be a little stronger. I suggest before you buy check all the weight ratings. My Heartland Wilderness cargo weight is so low that if I fill the water tank the trailer is over its weight limit. Meaning I can't put anything less in the trailer. No clothes, food or non water drink.