I am trying to run my RV with the SBV6400. I am not able to get more than 1500 watts output from the 30 amp plug. I realize there's an RV mode, and I have turned it on, but still I am not able to get anywhere near the 3800 claimed watts of output. Anytime I try to run the air conditioning, which pulls about 1500 watts, and turn anything else on such as the microwave, which should only be 1,000 w max , it shuts off. Very disappointed that I am not getting anywhere near the claimed output.