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Parabolic-Trough Technology Roadmap January 1999 One study for the California Energy Commission comparing taxes paid by concentrating solar power technologies with taxes paid by fossil technologies showed that approximate tax equity was achieved with a 20% federal investment tax credit and property tax exemption for CSP technologies. Tax equity in this case results in an 18% reduction in levelized energy cost. Although these results apply to the specific case tested, it shows the approximate level of tax equalizers necessary to gain parity between solar and conventional technologies. ÿ Low-Cost Debt Finally, a number of institutions have indicated that low-cost debt may be available for renewable power projects. Given the capital intensity of solar technologies, this offers one of the largest opportunities for cost reduction. For example, the availability of 2% debt in place of 9.5% debt could reduce the levelized cost of energy by more than 30%. Figure 5 summarizes the opportunities for cost reduction in parabolic-trough power technology. These cost reduction opportunities are generally multiplicative, but not all would be taken together. Although cost reduction is often thought to result primarily from the introduction of advanced technologies, it is clear that the most significant opportunities for cost reduction are through non- technology development areas. The largest opportunities result from the type of project financing and the existence of a power park to consolidate construction and O&M costs. 35% 30% 25% 20% 15% 10% 5% 0% 50 to 160 MW ISCCS Hybrid Tech. Solar Dev. Park GenCo Finance Tax 2% Debt Equity Figure 5. Cost reduction opportunities THE COST OF TROUGH TECHNOLOGY TODAY What would a trough power plant cost today? LUZ reported costs starting at 24¢/kWh for SEGS I down to 8¢/kWh for SEGS IX. These values were calculated in 1988 dollars and with the tax and financial structure of the projects at the time. Figure 6 shows what the cost of power from the 30- MW SEGS VI would be today after correcting for inflation, incorporating changes in the tax code, and adjusting for the actual performance of the plant. In the case of SEGS VI, if the same plant were built again today, the levelized cost of energy from the plant increases from 11.5¢/kWh in 1988 dollars (based on predicted performance) to 18.3¢/kWh in 1998 dollars (based on actual performance). Page 12 % Reduction in LECPDF Image | A Pathway for Sustained Commercial Development and Deployment of Parabolic Trough Technology
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