A lot of people don't know it, but peppers are perennials. It's possible to keep them growing all year long. I've done it before. They just have to be kept above freezing.
I had a number of pepper plants in containers. When it got cold I moved them to my garage and kept them under fluorescent lights. They took up a lot of space. It was pretty inconvenient. This year I thought I'd try putting them in my greenhouse.
temperature control system has worked great. It hasn't gotten below freezing in there even though we had some cold nights get into the teens. I think the issue is humidity. It's too humid in the greenhouse and the plants have gotten a brown hairy mold/fungus on them. I tried pruning them but I don't think it helped.
I moved the plants out of the greenhouse once the arctic air passed. It's too late for two of them, but the other two might have a chance. I'll just have to wait and see...