I'd go with at least 8-10 yrs. That assumes a hefty increase in valuation of the home price due to the solar PV array. For my installation I was out-of-pocket over $18K. The attached Table shows calculated payback using only energy cost savings (at various KWH cost to you from electric co and REC (@$0.06KWH)). The red line is my actual. No depreciation or increase in house value included.
Last edited by PRBuzz; 01-18-2010 at 02:48 PM..
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