I know it isn't a zero but it puts out very limited power so in some ways I had to improvise more for winter.
This is my ninja 250 I commute with every day to work, 26 miles one way, taking about 30 minutes.
http://www.flickr.com/photos/71805301@N05/sets/72157629374581805/It has daystar heated grips (18w low 30w high [real watts used not post resistor values), hippo hands with bracket inside to keep them stable in high winds, 19" touring shield I duck behind when it drops bellow 20 (anything above and I can sit upright), battery heated gerbings T5 gloves, 'winter wings' (the clear plexiglass blocking from knee down to foot [they are metal this year]), airhawk 2 seat (keeps bum warm and is comfortable), carb heaters (~30w)
I cannot use any other heated gear unless it has its own battery and I have to turn items off if the rpms drop below 4k or the battery will slowly drain -_- LED's everywhere on this bike including the dash, I have a 35w HID, all in an effort to reduce power consumption.
As the bike is set up now it gets about 55mpg in winter, stock it can get 65 but I wouldn't be comfortable. :/