Parallax | 30 Amp Transfer Switch | ATS301Take the hassle and risk out of switching between shore power and generator power with the Parallax ATS301 30 Amp Automatic Transfer Switch. Designed specifically for 30 amp, 120V electrical systems, this transfer switch automatically routes power between your two sources, so you never have to handle plugs, swap cords, or fumble with breakers when switching power on the road. Reliable, Automatic Power Transfer The ATS301 is one of the most trusted