Pinball,
I have already done an analysis on my site (using PVwatts), have gotten quotes and it looks like I can get a system for about $1.70 a watt for a 10 kW system (self install).
Need those before I apply to USDA or NRCS.
I do a lot of summer irrigation and that eats up a lot of kWatts.
The purpose of the graph is that I can predict, rather accurately, my winter heating costs. From the graph, it looks like two houses and barn office costs me about $432 a year for heating.
Geothermal heat pumps are a simple no brainer for return on investment. Even more so if you rig one up.
Steve
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consulting on geothermal heating/cooling & rational energy use since 1990
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