I and my Model S85D will be away from home for the summer for 10 weeks. I've found a short-term rental that is terrific in all respects except that the garage has no power except for the garage door opener. Whether the garage door opener's power comes from an outlet in the ceiling (as does that in my home garage) or is hard wired I don't know. If it's from an outlet, maybe I could plug in a splitter and string an extension cord along the ceiling and down a wall. Would such an outlet supply 15+ amps? Are door openers generally plugged into a ceiling outlet or hard wired? The building was constructed in 2003, if that makes any difference. I freely admit that all I know about electricity is that electrons are yellow.