Facts on Energy: Solar

• In 2008, solar generating capacity in the U.S. totaled 514 megawatts and generated 843 million kilowatt hours.[3] Solar turbines generated only a percentage of their theoretical maximum output due to their intermittency (the sun does not always shine).
• In 2006, photovoltaic cell and module shipments totaled 337 megawatts, and were estimated at 430 megawatts in 2007. These include communications, transportation, health, and grid-interactive and remote electric generation applications. [4]
• Due to incentives in the stimulus and to state mandates highlighted below, the Energy Information Administration projects solar thermal and photovoltaic generating capacity in the electric power sector to increase to 0.60 gigawatts by 2010, 1.02 gigawatts by 2020, and 1.24 gigawatts by 2030. End-use photovoltaic capacity is expected to grow to 1.86 gigawatts in 2010, 10.78 gigawatts in 2020, and 12.3 gigawatts in 2030. Together, generation from solar is projected to increase to 4.12 billion kilowatt hours by 2010, 20.11 billion kilowatt hours by 2020, and 23.22 billion kilowatt hours by 2030. This level of projected solar generation in 2030 represents 0.46 percent of total U.S. electricity generation.[5]
• Because solar power is available only when the sun shines and varies with the seasons of the year, statements about how solar units can produce enough electricity to serve a large number of homes are misleading. Since a solar unit cannot supply power continuously, dispatchable generators (usually fossil-fuel) are required to provide back-up power to the system.

Transmission Facts

• Total spending on new transmission by all investor-owned utilities in 2006 [current dollars] was $6.9 billion.[6] This figure underestimates total transmission spending since it excludes Government-owned utilities and cooperatives.
• According to a November 2008 study by Brattle Group, total investment in transmission and distribution through 2030 is expected to total $880 billion, where $298 billion would be for transmission and $582 billion would be for distribution. The figure includes integration of 214 gigawatts of new generating capacity of which 39 gigawatts is for renewable technologies required under existing state renewable portfolio standards, continued installation of a "smart grid", accommodation for new end-use technologies such as plug-in hybrid electric vehicles, and bringing new efficiencies and service options to end use customers. The authors caution that the figure could be an underestimate since it is derived from shareholder-owned electric utility expenditure data that excludes investments made by electric cooperatives and Government-owned utilities. [7]
• There is no standard definition of a "smart grid". It generally refers to technologies that: 1) provide customers with information and tools that allow them to be responsive to system conditions, 2) ensure more efficient use of the electric grid, and 3) enhance system reliability. The latest federal stimulus law provides $11 billion for smart grid technology, including $4.5 billion for smart-technology matching grants. [8] The $11 billion is a small percentage of what's needed to get to the $880 billion mark, and that amount does not support a 20 percent renewable scenario by 2030.
• In Europe, it is estimated that 1.2 trillion Euros ($1.55 trillion) would be needed to build a super grid that captures offshore wind, hydropower, and solar panel arrays. [9] It would require a new network of cables and interconnectors to bring offshore generated electricity to land and modernization of the onshore grid to deal with sudden changes in supply and demand and clear bottlenecks.

Solar Subsidies

• The Energy Information Administration estimates that total Federal subsidies for electric production for fiscal year 2007 from solar power are $24.34 per megawatt hour, compared to 44 cents for traditional coal, 25 cents for natural gas and petroleum liquids, 67 cents for hydroelectric power, and $1.59 for nuclear. Solar subsidies for non-electric production in fiscal 2007 totaled $2.82 per million Btu, second only to ethanol/biofuels at $5.72 per million Btu. (Figures are in 2007 dollars.) [10]
• According to the General Accounting Office, in fiscal year 2007, solar received 9.2 percent of all federal research subsidies to power generation but produced only 0.016 percent of U.S. electricity. Per kilowatt-hour, this was 1255 times higher than the amount allocated to coal, most of which was spent to develop cleaner technologies. Coal produced 51.4 percent of all U.S. electricity in fiscal year 2007.[11]

Policies Affecting Solar

• While no federal renewable portfolio standard (RPS) exists, 28 states and the District of Columbia have a renewable portfolio standard mandating a certain percentage of a utility's power plant capacity or generation to come from renewable sources by a certain date.[12] However, most States are out of compliance with their own program due to issues with their RPS formulation, reporting mechanisms, monitoring, and exaction of penalties for non-compliance.[13] (Texas is the major exception.)
• Tax incentives directed toward solar generation originated with the Energy Tax Act of 1978 (Public Law 95-618), which established a business energy tax credit of 10 percent of investment in solar technologies. The business tax credit was extended periodically until passage of the Energy Policy Act of 1992. As part of the Energy Policy Act of 1992, it became a permanent 10 percent tax credit. Section 1335 of the Energy Policy Act of 2005 (EPACT2005)(Public Law 109-58) established a 30-percent personal tax credit, not to exceed $2,000 for the purchase of solar electric and solar water heating property. The Emergency Economic Stabilization Act of 2008 extended it to 2016 and lifted the $2,000 cap. The 2008 law allowed electric utilities to qualify. [14]
• The New Technology Credit , also known as the Production Tax Credit (PTC), was first introduced as part of the Energy Policy Act of 1992 (EPACT1992) (Public Law 102-486). The credit was defined as a 1.5-cents-per-kilowatthour (kWh) payment (adjusted annually for inflation), payable for 10 years, to private investors as well as to investor-owned electric utilities for electricity from wind power and closed-loop (dedicated crops) biomass facilities. The American Jobs Creation Act of 2004 (AJCA) (Public Law 108-357) expanded the PTC to include solar energy. However, the recipient of the credit had to choose one of the two credits (i.e. either the PTC or the ITC). The Energy Policy Act of 2005 (EPACT2005) (Public Law 109-58) made solar facilities placed into service after December 31, 2005, ineligible for the PTC. While solar was eligible for the PTC for a brief period, its impact on solar development was largely inconsequential. [15]

What Does Solar Cost?

• The Energy Information Administration assumes the total overnight capital cost of solar thermal technology to be $5,021 per kilowatt (in 2007 dollars).[16]
• The Energy information Administration calculates the levelized cost of generating technologies, which is the present value of the total cost of building and operating a generating plant over its financial life, converted to equal annual payments and amortized over expected annual generation. In 2016, the levelized cost of solar thermal is 26.37 cents per kilowatt hour (in 2007 dollars) and for solar photovoltaic, it is 50 percent higher, 39.57 cents per kilowatt hour. The costs for solar technologies are higher than that of natural gas combined cycle, whose costs are 7.99 to 8.39 cents per kilowatt hour. Pulverized coal and coal-fired integrated gasification combined cycle have levelized costs at 9.46 and 10.35 cents per kilowatt hour, respectively. EIA includes a 3-percentage point increase in the cost of capital when evaluating investments in greenhouse gas intensive technologies, such as these coal projects, which is equivalent to a $15 per ton carbon dioxide emission fee, and a 2 percentage point reduction in the cost-of-capital for eligible renewable technologies under the loan guarantee program of the Stimulus Act. [17]
• According to Houston-based Standard Renewable Energy, an installed residential solar system for a 2,100-square-foot-home would cost about $25,500. [18]

Land Mass

• For comparison purposes, the land mass and output of California's Diablo Canyon Power Plant is compared to the land mass required to produce a similar quantity of electricity using solar power. The 2,200 megawatt nuclear facility requires 3 square kilometers, while a solar power station would require 687.5 square kilometers with a power density of 3 watts per square meter.[19]
• Examples of solar plants are the 14-megawatt Nellis solar facility in Nevada with some 70,000 panels and the 11-megawatt solar facility in Serpa, Portugal, with 52,000 panels. [20]

Texas

• Texas law requires that 5,880 megawatts of new renewable generation be built in the state by 2015, which will meet about 5 percent of the state's projected electricity demand. The legislation also sets a cumulative target of installing 10,000 megawatts of renewable generation capacity by 2025. The measure also includes a requirement that the state must meet 500 megawatts of the 2025 target with non-wind renewable generation.[21]
• According to Houston-based Standard Renewable Energy, an installed residential solar system for a 2,100-square-foot-home would cost about $25,500. The existing federal incentives (the 30-percent ITC) would subsidize that cost by $7,650. In Austin, residents get an additional subsidy of $13,500, and in Dallas, they get approximately another $7,900. [22]
• The Texas legislature recently passed a measure to let homeowners finance their ">solar installations with help from the local government, and pay back the cost via extra property taxes over 20 years. [23]
• The staff of the Electric Reliability Council of Texas (ERCOT) with input from stakeholders estimated the costs and benefits of various generating technologies. The cost of solar photovoltaic was estimated at $314 per megawatt hour (about 8 times more than a coal-fired plant) and the cost of solar thermal was estimated at $169 per megawatt hours (over 4 times the cost of a coal-fired plant). These costs are approximate generation cost averages with many variable factors including capital costs, life expectancy, operation and maintenance, capacity factor and fuel costs. They exclude ancillary services costs and transmission impacts. [24]

California

• The California Energy Commission has estimated that its requirement of 33 percent renewables in 2020 will entail $5.7 billion in new 500 and 230 kV transmission lines alone, in addition to lower-voltage lines, substations, and reactive power supplies. The figure does not include lines associated with new or upgraded conventional generation.[25]
• In 2006, solar capacity in California was 402 megawatts, 0.6 percent of the state total capacity of 63,213 megawatts.[26]
• In 2007, California's solar capacity produced 0.26 percent of the state's electricity.[27]
• In 2008, California had the most installed photovoltaic panels that are tied to the power grid, and increased its share by 179 megawatts.[28]

International

• The U.S. ranks fourth in the world for cumulative installed solar electric power. Germany is first, Spain is second, and Japan is third. [29] In Germany, a feed-in tariff of 27 cents per kilowatt hour has produced an explosion in the use of solar photovoltaics. Under a feed-in tariff, electric utilities are obligated to purchase renewable electricity at a higher rate than retail, in order for the renewable technology to overcome price disadvantages. In Japan, the government has set a target for 30 percent of all households to have solar panels installed by 2030. [30] See the bullet below on Spain.
• The International Energy Agency is projecting solar capacity to reach 208 gigawatts by 2030, 2.7 percent of the total capacity projected for that year, generating one percent of the world's electricity. In 2006, it generated 0.02 percent of the world's electricity and represented 0.2 percent of the world's capacity. [31]
• Britain has a European target of meeting 15 percent of its electricity demand in 2020 with renewable sources. Some government insiders feel the task is hopeless. The government's own clean-energy advisers have warned that Britain could spend ¬£100bn over the next decade and still not hit the target. The credit crunch slowed the already slow rate of renewable deployment to a crawl. Almost half the power generated in Britain comes from coal and a bit more than a third from natural gas. Nuclear power stations contribute 17 percent and wind provides 0.6 percent. [32] In 2007, solar PV provided 0.3 percent of the UK's renewable generation capacity and 0.1 percent of its renewable electricity. [33]
• Spain has legislation that requires 20 percent of its electricity production to be from renewable energy by 2010. Spain's National Energy Commission estimates that 2,945 megawatts of solar capacity were installed by year-end 2008, with 2,253 megawatts installed in 2008, making Spain the second-largest country for installed solar capacity. Solar energy generated less than 1 percent of Spain's total electricity production in 2008 at a price per kilowatt hour that was over 7 times higher than the average price. To attract investors and make renewable energy profitable against other forms of energy, Spain found that renewable energy must be subsidized. Spain provides both regulated rates and direct incentives to attract investment and meet its policy goals. However, a Spanish university researcher found that the "green jobs" agenda that the Spanish Government has instituted, and to which the U.S. government now promotes, has, in fact, resulted in job loss elsewhere in the country's economy. For each "green" megawatt installed, 5.28 jobs on average were lost in the Spanish economy, and for each megawatt of solar energy installed, 12.7 jobs were lost. Although solar energy may appear to employ many workers in the plant's construction, in reality it consumes a great amount of capital that would have created many more jobs in other parts of the economy. [34] Recently, the Spanish Government decided to slash subsidies to solar power. The government will subsidize just 500 megawatts of solar projects this year, down sharply from 2,400 megawatts last year. [35]

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