On Mon, 21 May 2007 06:44:30 -0500, Brian Whatcott
wrote:

Let's take another shot at this one.
$1500 for 6kW of electrical power for 1500 hours
AND
6kW PLUS of heating over 1500 hrs
represents a combined heat and power capital cost of
8.3 cents per kWhr
Hence:
Generating your own power and heat can be cost-effective
if you buy power for 10cents/kW.hr

That assumes you always run at full power and can take advantage of
the heat, and further assumes zero fuel and maintenance costs.

I rest my case.