Hello. I'm new here. I just discovered this fora thru Google and was hoping someone could help me. It will be obvious in a second that I'm not an engineer, so please pardon the silly/simple question: I have a device that was built for a car/RV that I want to run at home. (It's a wheelchair lift that normally goes onto an RV, but I installed it on my house so my father-in-law can get up the 4 steps into my house.) The lift runs on DC 12V. I would prefer not to power it via a car battery, but would like to "just plug it in." Can I "just plug it in?" If yes, what do I need? If no, why not?