So as basically is sounds like the idea is untenable. At the time of this posting the problem had been on my desk for about 3 minutes. The solution to the problem of the flowing water had already been decided upon by my PM... the solar>batter>heat tape solution. I thought it sounded a bit...
I've recently been handed the task of trying to design a stand-alone system to heat a 10 foot section of water pipe during the winter months.
Let me preface with the fact that I'm an environmental engineer and it's been a while since my Intro to Electrical classes.
I figure I'll need a 10-20W...