Brand New, Opened Box but Sold RV Have used several of these and they allow your A/C to be run quietly on a small generator if necessary. Great Unit. Features & details HOW DOES IT WORK?: When your RV air conditioner compressor kicks in, it can overload your generator and trip the breaker. The advanced soft starter technology within our soft start for rv air conditioner units, reduces peak amp usage and runs your air conditioning system for longer periods, resulting in fewer tripped breakers and more uninterrupted fun! WHAT SEPARATES US FROM THE COMPETITION? It’s NOW 40% smaller than all others, allowing it to fit in all Low-Profile Rooftop RV A/C Units. It can start two A/Cs on one 30-amp hookup, one A/C with a small Generator, and one A/C on a 15-amp house circuit. It’s 100% waterproof, and has a 3 year warranty with a 90-day full money back guarantee - love it, or return it! Our RV soft start technology for air conditioners is unprecedented in the market TOO MANY APPLIANCES? SoftStartRV introduces cutting-edge technology that enables your rooftop air conditioner, refrigerator, heater, microwave, hair dryer, fan, and TV to start EVEN WITH LOW POWER. Our RV Air conditioner soft start can seamlessly kickstart all these appliances using a small 2200 Watt generator, effortlessly firing up a 15000 BTU RV A/C system mounted on the roof! Best of all, SoftStartRV has you covered up to 36,000 BTUs TIRED OF YOUR LOUD A/C WAKING YOU UP?: Say goodbye to disruptive thumps and trailer shaking during the night. SoftStartRV significantly reduces A/C compressor noise and vibrations, delivering an enhanced overall RV experience and facilitating a better night's sleep. The startup process for our easy start solution for RV air conditioner units, ensures a good night's rest.