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Solar Power To Become Cost-Competitive
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Solar Power To Become Cost-Competitive  
“The future of solar PV looks rather bright. The industry has consistently been able to lower the cost of solar panels.”   
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Monday, June 18, 2012 The future of solar power is undecided as yet. The environment-friendly quotient of generating electricity through solar power has been widely accepted but when the economic traces come in the picture, one may not agree. 'The Prospects for Cost-Competitive Solar PV Power' by Stefan Reichelstein, William R Timken, professor of Accounting at the Stanford Graduate School of Business, and Michael Yorston, graduate student in the Department of Management Science and Engineering at Stanford University, discusses the future of solar power and economic aspects associated.

Their paper breaks new ground in studying the life-cycle cost of electricity generated by solar photovoltaic, paying particular attention to key factors such as location, public subsidies, and the long-term learning effects in manufacturing solar panels.

Solar PV, Solar Power, solar panels, The Prospects for Cost-Competitive Solar PV Power,Stefan Reichelstein, William R. Timken Professor of Accounting at the Stanford Graduate School of Business, and Michael Yorston, graduate student in the Department of Management Science and Engineering at Stanford University, solar photovoltaic, natural gas, solar installations,Renewable energy, retail electricity prices,Economic Stabilization Act of 2008, federal tax, fossil-fuels, economics of solar power

Professor Reichelstein discusses the findings below:

Why did you decide to study the economics of solar photovoltaic power at this time?

Renewable energy and solar in particular remain rather controversial in the public debate about energy policy. Passions have been running high. What motivated me is the bewildering range of statements you have out there regarding the cost effectiveness of electricity based on solar PV. Given the range of opinions, I wanted to do my own analysis. I’m looking at it from the point of view of a business economist who is interested in measuring the life-cycle cost of this abundant energy source.

Your main conclusions?

Solar PV is not yet competitive with fossil fuel, like natural gas, from the perspective of a utility that can either build a new natural gas power plant or invest in solar installations.

For a commercial power user, say a business with plenty of rooftop space, the cost of generating your own electricity is now on par with what the business would need to pay in retail electricity prices. In that sense, grid parity has been achieved for commercial-scale installations. However, I need to add immediately that this is subject to two important qualifiers. The facility has to be in a favorable location, such as the Southwestern United States, and secondly the business must be able to take advantage of the current federal tax subsidies.

Concerning the future, and this may sound like a pun, the future of solar PV looks rather bright. The industry has consistently been able to lower the cost of solar panels. If this trend can be maintained for the next 10 years, and if subsidies are continued for that period, there is a real prospect for solar to become cost competitive on its own (that is, without a subsidy), at least for commercial installations. Utility-scale installations will take longer to become competitive; possibly 15 years, though it obviously becomes murkier to make projections that far into the future.

What happens if subsidies disappear or are sharply reduced?

The current federal tax subsidies come out of the Economic Stabilization Act of 2008 and will be in place until 2016 unless Congress changes the rules. The solar panel manufacturing industry has been on a remarkably steady learning curve for several decades now, which has pushed down the systems price of solar panels at a dramatic rate. However, this learning curve seems very much dependent upon production volume. So, if the tax subsidies were to cease, new production volume would probably be lower, and the effect of that would be to slow down the rate of cost improvements.

If the current preferential tax treatment is kept in place for about the next 10 years, and the observed learning curve holds up, we are projecting that, at that point in time, solar-generated electricity would be competitive with that generated from fossil-fuel power plants.

Why will it take longer for utility-scale installations to stand on their own, than for commercial-scale installations?

You have different benchmarks. For commercial-scale – and also for residential — solar, the benchmark is the retail price of electricity, while for utility-scale projects it is the wholesale price. The difference between the two is the cost of transmission, distribution, and administration; that is, everything that gets you from generating the power to delivering it to your customers.

What is driving the economics of solar power?

A mix of federal tax incentives has been especially helpful to commercial-scale installations, and even to home installations. We’ve also seen dramatic growth in recent years of utility-scale installations despite their current cost disadvantage relative to fossil fuel power plants. The reason appears to be the additional subsidy mechanisms at the state and local level. Here in California, Assembly Bill 32 (a 2006 law that set goals for reducing greenhouse gas emissions) and the state’s “renewable portfolio standard,” which requires that 33% of California's electricity come from renewable resources by 2020, seem to be driving demand. Other countries (such as Germany) have different subsidy mechanisms that yield similar effects.

Priyanka swami, EFYTIMES News Network

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