Solar Energy & Solar Power Resources

Solar Energy in Portola Valley, CA

Solar Energy in Portola Valley

Sorry, historical solar radition values for Portola Valley are currently unavailable, please check back later.

Solar Panels in Portola Valley

Solar panels in Portola Valley that will produce the maximum solar energy output. [More]

Sunrise & Sunset in Portola Valley

The total length of the day in Portola Valley, CA today (February 28, 2025) will be 11 hours and 24 minutes. [More]

Solar Power in Portola Valley, CA

Solar Energy Data in Portola Valley, CA

See the chart below to see how different types of solar panel installations compare in Portola Valley.

Historical solar power output data for Portola Valley is not currently available.

Solar Energy Analysis for Portola Valley, CA

Sorry, it is not possible to complete our solar energy analysis for Portola Valley at this time.

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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 Portola Valley

Solar Radiation Data in Portola Valley, CA

See the chart below for monthly solar radiation levels in Portola Valley.

Sorry, data is not currently available.

Solar Radiation Analysis for Portola Valley, CA

Sorry, it is not possible to complete our solar radiation analysis for Portola Valley at this time.

Historical solar radiation data for Portola Valley is not currently available.

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Solar Power Comparison: Portola Valley vs. the U.S.

Solar Power Levels in Portola Valley

Sorry, solar radiation data for California is not currently available.

Solar Power: Portola Valley vs. the U.S.

Below is a month-by-month comparison of how average Portola Valley solar radiation levels compare to average levels in a city with historcially high levels (NV) and a city with historically low levels (WA). ^[1]

Sorry, solar radiation data for California is not currently available.

Solar Data & Statistics for Portola Valley

Sunrise / Sunset in Portola Valley

Sunrise/Sunset for February 28, 2025 ^[2]
- Sunrise: 6:39 am
- Sunset: 6:03 pm
- Length of Day: 11:24

Solar Energy Statistics for Portola Valley

Best Months for Solar in Portola Valley

Monthly data not currently available.

Solar Panel Installs in Portola Valley

We do not currently have data on solar panel installations in the town of Portola Valley, CA at this current time.

Solar Power Output in Portola Valley

The Power of Solar in Portola Valley, CA

Monthly AC solar system output averages for Portola Valley (ca). Month-by-month solar power, as ranked by AC output, in Portola Valley. ^[2]

AC output data is not currently available.

Solar Output Analysis for Portola Valley, CA

Sorry, it is not possible to complete our solar radiation analysis for Portola Valley at this time.

Historical solar radiation data for Portola Valley is not currently available.

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Cost of Utilities in Portola Valley

Portola Valley Electricity Costs

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Solar Power Poll: Portola Valley

Vote now: Given all of the data and analysis provided for Portola Valley, is solar power a good choice for residents of this town?

Portola Valley Natural Gas Costs

Sorry, California residential natural gas prices are currently unavailable.

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Weather Forecast for Portola Valley, CA ^[5]

Fri Feb 28

66°F

Broken Clouds
Min: 51°F
Max: 69°F

Light breeze: 5 mps WNW
Precip.: n/a
Humidity: 54%
Cloud cover: 60%

Sat Mar 1

63°F

Light Rain
Min: 46°F
Max: 64°F

Gentle Breeze: 9 mps WNW
Precip.: Chance of Rain
Humidity: 50%
Cloud cover: 51%

Sun Mar 2

54°F

Light Rain
Min: 46°F
Max: 54°F

Moderate breeze: 15 mps WNW
Precip.: Chance of Rain
Humidity: 60%
Cloud cover: 76%

Mon Mar 3

54°F

Moderate Rain
Min: 46°F
Max: 54°F

Moderate breeze: 14 mps WNW
Precip.: Chance of Rain
Humidity: 65%
Cloud cover: 70%

Tue Mar 4

56°F

Few Clouds
Min: 45°F
Max: 56°F

Gentle Breeze: 10 mps NW
Precip.: n/a
Humidity: 61%
Cloud cover: 22%

Wed Mar 5

55°F

Few Clouds
Min: 43°F
Max: 55°F

Gentle Breeze: 11 mps WNW
Precip.: n/a
Humidity: 52%
Cloud cover: 22%

More about Portola Valley

About Portola Valley

The town of Portola Valley, CA in San Mateo County has an approximate population of 4,353. ^[6]

Portola Valley, CA Solar Energy

To learn more about solar energy and solar power Portola Valley, CA, or for more solar-related resources for Portola Valley, visit the U.S. Energy Information Administration.