<p>^^</p>
<p>This reinforces the basic concept that it is impossible to draw general conclusions. The impact of fiscal incentves are wide ranging on an individual basis. Just as the expected production, and especially long term production is. The future availability of cheaper technology is still in flux as a market with excessive supply caused a financial tsunami where governments were forces to curb their incentives. The “new” solar industry, despite the numerous bankruptcies, is rebounding, albeit with increased cost. The model that predicted decreases similar to the Intel chips is probably not happening anytime soon. It will happen in the future but solar energy will remain a costly proposal, and perhaps the costlier of all resources for a long time, safe and except for niche markets. </p>
<p>The longevity of the current crop of panels remains an unanswered question. The first wave of wind turbines in California were also expected to have a 30 years lifespan. The developers were lucky to reach the end of the first ten years. When projects reverted to avoided cost (without frontloaded contracts) most turbines could not cover their repair costs. Interested parties in that history might enjoy reading the description of Kenetech/US Windpower <a href=“History of Kenetech Corporation – FundingUniverse”>http://www.fundinguniverse.com/company-histories/kenetech-corporation-history/</a> </p>
<p>The technology has changed considerably since the inception of the wind energy business. The technical issues have a thing of the past and the technology is as sound as they come. On the other hand, the PV industry has yet to overcome their massive issue of competitive cost/reward ratio on a long term basis. </p>
<p>PS Here is an interesting link (many interesting links are available at NREL although most are on the theoretical basis the US loves so much) </p>
<p><a href=“http://pvwatts.nrel.gov/”>http://pvwatts.nrel.gov/</a></p>