advice on the customer conversion rate needed
gridspy: First step: Know your competition.
http://blog.mapawatt.com/2009/10/07/list-of-energy-monitorin...Count me in on your list of competitors with Gridspy:
http://www.gridspy.co.nz/I'd be thinking in terms of years to pay back the system. Talking to clients will give you an idea where they lie on the scale of 1 to 10 years.