20amps can do a lot, heres a tip ,your ac will pull that on start up ,so you can only run one thing at a time and a few lites the micro and ac will not run at the same time, things that pull high amps are your AC,, micro,, hair dryer,,water heater . use those one at a time ,tv radio,,lights pull little amps . we have a small mh and wife and daughter servive just fine on 20 amps . use your propane for the water heater, we don,t leave it on all the time just high use time. have fun learn where your breaker panel is ,and the breakers on the post.