Solar is getting its due from the Energy Information Administration, which is now reporting customer-sited photovoltaic capacity, in addition to the utility-scale PV total.
Earlier this year we reported on research by Michael Mendelsohn, a market and policy impact analyst at the National Renewable Energy Lab in Colorado, that revealed that EIA reports on the state of U.S. energy production were missing not just some but the majority of solar energy generated.
But the agency reported late last month a new estimate that attempts to include the under-1 megawatt systems it had been missing. The result isn’t a power generation figure like Mendelsohn came up with, but the EIA did arrive at a well-informed stab at the total grid-connected PV capacity in the country — 3,536 MW AC.
As the chart above shows, this breaks down as about 1,000 MW residential, 1,500 commercial and industrial, and 1,000 MW utility-scale. But even the EIA admits that these numbers are very likely on the low side — which is why they call their estimate a “lower bound.”
“It is important to emphasize that this estimate is a lower bound for total PV capacity, as there are likely PV installations that are not captured” on either the reporting forms filed by utility-scale power plants or those filed by retail electricity providers serving net metered generators.
In his calculation, Mendelsohn used numbers from the Solar Energy Industries Association to try to get at a figure that better captured U.S. solar power production. There were some complexities and hurdles in doing this, and he had to make some adjustments and assumptions. But even taking a very conservative route, Mendelsohn arrived at a production number of 4,958 gigawatt-hours for 2011 — about 2.6 times the EIA number of 1,800 GWh.
As for capacity, Mendelsohn had total solar capacity at 4,458, but that included 503 MW of concentrating solar power and used Solar Energy Industries Association numbers reported in DC. That’s the form of electricity produced by panels, and from 10 to 20 percent of it is lost when converted to AC for the grid. With all that taken into account, the EIA’s figures look to be right in the same ballpark as Mendelsohn.
—Pete Danko
This post originally appeared at EarthTechling and was republished with permission.
Related Topics
Go Further
Animals
- Soy, skim … spider. Are any of these technically milk?Soy, skim … spider. Are any of these technically milk?
- This pristine piece of the Amazon shows nature’s resilienceThis pristine piece of the Amazon shows nature’s resilience
- Octopuses have a lot of secrets. Can you guess 8 of them?
- Animals
- Feature
Octopuses have a lot of secrets. Can you guess 8 of them?
Environment
- This pristine piece of the Amazon shows nature’s resilienceThis pristine piece of the Amazon shows nature’s resilience
- Listen to 30 years of climate change transformed into haunting musicListen to 30 years of climate change transformed into haunting music
- This ancient society tried to stop El Niño—with child sacrificeThis ancient society tried to stop El Niño—with child sacrifice
- U.S. plans to clean its drinking water. What does that mean?U.S. plans to clean its drinking water. What does that mean?
History & Culture
- Gambling is everywhere now. When is that a problem?Gambling is everywhere now. When is that a problem?
- Beauty is pain—at least it was in 17th-century SpainBeauty is pain—at least it was in 17th-century Spain
- The real spies who inspired ‘The Ministry of Ungentlemanly Warfare’The real spies who inspired ‘The Ministry of Ungentlemanly Warfare’
- Heard of Zoroastrianism? The religion still has fervent followersHeard of Zoroastrianism? The religion still has fervent followers
- Strange clues in a Maya temple reveal a fiery political dramaStrange clues in a Maya temple reveal a fiery political drama
Science
- Soy, skim … spider. Are any of these technically milk?Soy, skim … spider. Are any of these technically milk?
- Can aspirin help protect against colorectal cancers?Can aspirin help protect against colorectal cancers?
- The unexpected health benefits of Ozempic and MounjaroThe unexpected health benefits of Ozempic and Mounjaro
- Do you have an inner monologue? Here’s what it reveals about you.Do you have an inner monologue? Here’s what it reveals about you.
- Jupiter’s volcanic moon Io has been erupting for billions of yearsJupiter’s volcanic moon Io has been erupting for billions of years
Travel
- Follow in the footsteps of Robin Hood in Sherwood ForestFollow in the footsteps of Robin Hood in Sherwood Forest
- This chef is taking Indian cuisine in a bold new directionThis chef is taking Indian cuisine in a bold new direction
- On the path of Latin America's greatest wildlife migrationOn the path of Latin America's greatest wildlife migration
- Everything you need to know about Everglades National ParkEverything you need to know about Everglades National Park