Tag: solar-panels

Solar now costs 6¢ per kilowatt-hour, beating government goal by 3 years

Enlarge / From the Department of Energy: “This photo shows the construction phase of a 16.5 MW DC solar farm built in Oxford, MA. This 130-acre property was previously known as the largest piggery in Massachusetts.” (credit: Lucas Faria/ US Department of Energy ) On Tuesday, the Department of Energy (DOE) announced that utility-grade solar panels have hit cost targets set for 2020 , three years ahead of schedule. Those targets reflect around $1 per watt and 6¢ per kilowatt-hour in Kansas City, the department’s mid-range yardstick for solar panel cost per unit of energy produced (New York is considered the high-cost end, and Phoenix, Arizona, which has much more sunlight than most other major cities in the country, reflects the low-cost end). Those prices don’t include an Investment Tax Credit (ITC), which makes solar panels even cheaper. The Energy Department said that the cost per watt was assessed in terms of total installed system costs for developers. That means the number is based on “the sales price paid to the installer; therefore, it includes profit in the cost of the hardware,” according to a department presentation  (PDF). The National Renewable Energy Laboratory (NREL), a DOE-funded lab that assesses solar panel cost, wrote that, compared to the first quarter in 2016 , the first quarter in 2017 saw a 29-percent decline in installed cost for utility-scale solar, which was attributed to lower photovoltaic module and inverter prices, better panel efficiency, and reduced labor costs. Despite the plummeting costs for utility-scale solar, costs for commercial and residential solar panels have not fallen quite as quickly—just 15 percent and 6 percent, respectively. Read 5 remaining paragraphs | Comments

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Solar now costs 6¢ per kilowatt-hour, beating government goal by 3 years

Solar energy has plunged in price—where does it go from here?

Enlarge / LONG ISLAND SOLAR FARM (credit: Brookhaven National Lab ) In the year 2000, the entire world had roughly four Gigawatts of solar power capacity installed, and it didn’t seem to be going anywhere fast. In 2002, the International Energy Agency forecast suggested that, by 2020, global solar capacity would still be hovering at around 10GW, and still barely register on the global energy markets. How things change. Over the 15 years that followed, solar energy capacity expanded by 5,700 percent, reaching 227GW. The International Energy Agency revised its solar estimates upwards three times over that span, but its most recent estimate—over 400GW of installed capacity by 2020—is already falling behind the curve of solar’s growth. In 2015, the most recent year that numbers are available, 57GW worth of solar panels were shipped. That’s enough to add 400GW of new capacity in seven years, under the completely unrealistic assumption that our manufacturing capacity won’t expand in the mean time. If most projections have been wrong, is there anything we can say about the future? An international team of energy experts makes an attempt to figure out where solar might be going out to the 2030s, when they expect we’ll have Terawatts worth of photovoltaics on our grids. Read 12 remaining paragraphs | Comments

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Solar energy has plunged in price—where does it go from here?