can't leave them plugged in all the time here in the summer. My neighbor tried this and after replacing 3 convertors he decided to unplug it and put a house fridge in his garage. Gets too hot inside the trailer when stored for long periods of time when ambient temps are consistently above 105+ in summer. I have owned 4 trailers in the last 15 yrs and never had a refer issue. Now that I have said that it will fail this weekend for sure. I'm going camping in Northern Az for 4 days. LOL