Based on the wattage available from your calculations the following winter equipment:
http://www.gerbing.com/divmc/clothing/jl.html 77Wats
http://www.gerbing.com/divmc/clothing/gloves.html 22Watts
http://www.gerbing.com/divmc/tempcontroller/port.html
would be cutting it close. I killed my battery using them on my Triumph Bonneville which rates the alternator at 27A and the battery at 12V-10Ah (I guess this means it would take one hour at 10Amps draw to discharge the battery).
I find it amazing that bike manufacturers insist on such close tolerances and give no wiggle room for additional electronics. Dont they want us riding in the winter?