Only complaint is it is transfer switch ready. But you have to use arduino or do some serious research to get the st switch wire functions to be able to connect this to a real ATS unit. I use an Eaton ATS and have an arduino to accept the remote start/stop wires on the ATS unit to send a three second ground out pulse to simulate the push of the start/stop button. A slight pain in the but if you don't know coding but there are enough open source fully functional code scripts that you can utilize to make it work. It makes no sense why they claim it to be transfer switch ready but then don't allow you to use the startup feature of a real automatic transfer switch. Instead they only offer the st switch which doesn't utilize the 50amp out, doesn't give you a one minute timer before cutting the generator on or off incase it's just a flicker vs an outage, and is way overpriced for its overall lack of usefulness given it wasn't even designed to be used at the recommended distance from your house. Sure you could use it in conjunction with an ATS to start the generator and just have a 9watt led light bulb plugged into it to get it to turn on and stay on but that does rob you of a few watts and I don't know the long term effects for using that and the 50amp plug. From what I have heard it can cause your breaker to trip on startup rendering the whole purpose of an ATS useless. They should make a plug in module for the ST switch plug that you could plug your industry standard two wire remote start/stop wires from an ATS switch. (Hey Westinghouse that suggestion is for you.). That said I got mine to work using an arduino and have my generator permanently mounted (wheels removed) on a concrete platform with an aluminum weatherproof case that is ventilated outside so there is no concern of it auto starting inside the garage. This portable unit provides enough power to run my living room, microwave and fridge, water heater, well pump, septic pump, my master bedroom, and one of my heat pump a/c units. I also went and had my heat pump breakers bridged so I can switch between my main level one my upstairs unit for night time running. I have my unit connected to a 250 gallon buried LPG tank but I do run the unit first and foremost with gasoline. I have a timer alarm that sends me a buzzer and I requires the fuel switch to be inside my ATS load center panel so I don't have to walk outside to switch the fuel. This generator is very good in that you can swap from gasoline to propane without restarting it. To avoid any surges I have three (yes three) whole home surge protectors. One is in the ATS load center, one is in my main service panel, and the other is on my service entry. It is overkill to a degree but if you have ever lost power you know that you will get a surge from the outage and switching to and from the generator power. Of course if you have a batter backup you can use an AGS module that starts the generator when your batter falls below the battery voltage threshold. You might be wondering why use a portable? Well when my surplus diesel finally died I quickly found that the availability of them was hard to come by and new diesels started at 15k. Even standby LPG generators start at 2k more than these amd usually less power. Plus these generators truly are the king of portables not to mention they are just one heck of a generator. They are so good while not recommended for medical equipment (no one officially or on the record recommends a generator for this purpose.). Many people around the world trust Westinghouse even over Hondas to power their small medical equipment. Just check the specs and you will see why. I love these so much I am saving to buy a second and run a second to permanently connect the other ac. Anyway highly recommend these.