I successfully over-wintered a musa sikkimus indoors last year, and it made some progress over the winter, but I had it in an undersized pot all summer so it didn't make much progress until I finally planted it in the fall.
This winter I'll try over-wintering an ensete mauralii by a south facing window(no artificial light) and will water it only if it really seems necessary so perhaps a cup each month. It does seem to get pretty good light on sunny days, and I'm pretty sure it is enough to get it through the winter. It is also in a cooler room that averages 65F over winter. I think this is a pretty safe way to get it through the winter.
Here's how it looks.
