Based on historical Boulder, CO data, solar panels that always track the sun throughout the day will produce the maximum solar energy output in Boulder.[1]
Boulder has an average monthly Global Horizontal Irradiance (GHI) of 4.41 kilowatt hours per square meter per day (kWh/m2/day), which is approximately 20% less than the average monthly Direct Normal Irradiance (DNI) of 5.51 kWh/m2/day. [1]
Solar installations in Boulder that are always titled at the latitude of Boulder (Average Tilt at Latitude or ATaL) average 5.35 kWh/m2/day, or about 21% greater than the average monthly GHI of 4.41 kWh/m2/day and approximately 3% less than the average monthly DNI of 5.51 kWh/m2/day. [1]
Solar Energy Glossary
Global Horizontal Irradiance (GHI)
Global Horizontal Irradiance: The total amount of solar radiation that is received per unit area by a surface that is always positioned in a horizontal manner.
Direct Normal Irradiance (DNI)
Direct Normal Irradiance: The total amount of solar radiation received per unit area by a surface that is always perpendicular to the sun rays that come in a straight line from the direction of the sun at its current position in the sky.
Average Tilt at Latitude (ATaL)
Average Tilt at Latitude: The total amount of solar radiation received per unit area by a surface that is tilted toward the equator at an angle equal to the current latitude. ATaL will often produce the optimum energy output.
Solar Radiation Levels in Boulder
Solar Radiation Data in Boulder, CO
See the chart below for monthly solar radiation levels in Boulder.
* Amounts listed in kWh/m2/day (kilowatt hours per square meter per day)
Solar Radiation Analysis for Boulder, CO
Boulder, CO has a average annual solar radiation value of 5.42 kilowatt hours per square meter per day (kWh/m2/day). [1]
The month with the highest historical solar radition values in Boulder is June with an average of 5.93 kWh/m2/day, followed by September at 5.92 kWh/m2/day and March at 5.89 kWh/m2/day. [1]
The three months that historically average the lowest average solar radiation levels in Boulder (Colorado) are December with an average of 4.42 kWh/m2/day, followed by January with an average of 4.6 kWh/m2/day and November at 4.98 kWh/m2/day. [1]
Solar Power Comparison: Boulder vs. the U.S.
Solar Power Levels in Boulder
The average monthly solar radiation level in Boulder, CO, of 5.42 kilowatt hours per square meter per day (kWh/m2/day) is approximately 38% greater than the average level of 3.93 kWh/m2/day in a city with historically low levels (WA) and is approximately 18% less than the average level of 6.61 kWh/m2/day in a city with historically high levels (NV). [1]
→ Values listed as 0 (zero) are not available (N/A).
Solar Power: Boulder vs. the U.S.
Below is a month-by-month comparison of how average Boulder solar radiation levels compare to average levels in a city with historcially high levels (NV) and a city with historically low levels (WA). [1]
→ k/m/d = kWh/m2/day = kilowatt hours per square meter per day.
→ Values listed as 0 (zero) are not available (N/A).
We do not currently have data on solar panel installations in the city of Boulder, CO at this current time.
Solar Power Output in Boulder
The Power of Solar in Boulder, CO
Monthly AC solar system output averages for Boulder (co). Month-by-month solar power, as ranked by AC output, in Boulder. [2]
* Amounts listed in kWhac (kilowatt hours (AC))
Solar Output Analysis for Boulder, CO
Boulder (CO) has a average annual solar AC output value of 6167.46 kilowatt hours (AC). [2]
The month with the highest historical solar power output in Boulder is March with an average of 585.82 kWhac, followed by May at 538.22 kWhac and September at 531.71 kWhac. [2]
The three months that historically average the lowest average solar output levels in Boulder (Colorado) are December with an average of 449.59 kWhac, followed by January with an average of 472.24 kWhac and February at 478.53 kWhac. [2]
Cost of Utilities in Boulder
Boulder Electricity Costs
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Solar Power Poll: Boulder
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Boulder Natural Gas Costs
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More about Boulder
About Boulder
The city of Boulder, CO in Boulder County has an approximate population of 97,385. [6]
Boulder, CO Solar Energy
To learn more about solar energy and solar power Boulder, CO, or for more solar-related resources for Boulder, visit the U.S. Energy Information Administration.
Did you know?
About half of the sun's energy is absorbed by the Earth's surface; about 30 percent is reflected back from the surface.