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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 are tilted towards the equator at an angle equal to the latitude will produce the maximum solar energy output. [More]

Sunrise & Sunset in Portola Valley

The total length of the day in Portola Valley, CA today (November 12, 2019) will be 10 hours and 14 minutes. [More]

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Portola Valley, CA Solar Energy

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.

* Amounts listed in kWh/m2/day (kilowatt hours per square meter per day).
* See glossary & definitions below.


Solar Energy Analysis for Portola Valley, CA

Solar Radiation Data in Portola Valley

Based on historical Portola Valley, CA data, solar panels that are tilted towards the equator at an angle equal to the latitude will produce the maximum solar energy output in Portola Valley. [1]

Portola Valley has an average monthly Global Horizontal Irradiance (GHI) of 4.87 kilowatt hours per square meter per day (kWh/m2/day), which is approximately 9% less than the average monthly Direct Normal Irradiance (DNI) of 5.34 kWh/m2/day. [1]

Solar installations in Portola Valley that are always titled at the latitude of Portola Valley (Average Tilt at Latitude or ATaL) average 5.58 kWh/m2/day, or about 15% greater than the average monthly GHI of 4.87 kWh/m2/day and approximately 4% greater than the average monthly DNI of 5.34 kWh/m2/day. [1]

* See glossary & definitions below.

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.

* Amounts listed in kWh/m2/day (kilowatt hours per square meter per day)

Solar Radiation Analysis for Portola Valley, CA

Solar Radiation Data in Portola Valley

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.

Please check back later.

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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. Please try again later.

Solar Power: 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]

→ k/m/d = kWh/m2/day = kilowatt hours per square meter per day.
→ Values listed as 0 (zero) are not available (N/A).

Solar Data & Statistics for Portola Valley

Sunrise / Sunset in Portola Valley

  • Sunrise/Sunset for November 12, 2019 [2]
    • Sunrise: 2:45 pm
    • Sunset: 1:00 am
    • Solar Noon: 7:53 pm
    • Length of Day: 10:14
Solar Energy Statistics for Portola Valley

Best Months for Solar in Portola Valley

  • Top Solar Power Months Historically [1]
    • Solar Radiation n/a
    • ATaL: August (6.96 kWh/m2/day)
    • DNI: July (7.32 kWh/m2/day)
    • GHI: July (7.47 kWh/m2/day)

* See glossary & definitions above.

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.

However, Portola Valley is in San Mateo County and San Mateo County has at least 0 solar insallations right now. [1]

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]

* Amounts listed in kWhac (kilowatt hours (AC))

Solar Output Analysis for Portola Valley, CA

Solar Radiation Data in Portola Valley

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.

Please check back later.

Cost of Utilities in Portola Valley

Portola Valley Electricity Costs

Electricity prices (residential) in Portola Valley averaged 19.86 cents per kilowatthour (¢/kWh) in August 2019, which was about 49% more than the overall U.S. average residential electricity rate of 13.30¢/kWh in August. [3]

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?

Yes, solar power is a great option  
No, solar power isn't a good option

Portola Valley Natural Gas Costs

Natural gas prices (residential) in California averaged $13.23 per thousand cubic feet (Mcf) in August 2019, which was approximately 29% less than the overall U.S. average residential natural gas rate of $18.58 per Mcf in August. [4]

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Solar Businesses in Portola Valley

Solar Energy Contractors in Portola Valley

Contractors & builders that specialize in solar panel installations in or near Portola Valley, CA.

Sorry, no local solar energy contractors found.

Our search for solar contractors companies located in Portola Valley produced no matches.

Solar Energy Equipment in Portola Valley

Businesses that sell solar energy equipment and/or solar parts in or near Portola Valley, CA.

Sorry, no local business selling solar equipment were found.

Our search for companies selling solar parts located in Portola Valley produced no matches.

Energy Conservation Consultants in Portola Valley

Energy conservation specialists that offer consulting services in or near Portola Valley, CA.

Sorry, no local energy conservation specialists were found.

Our search for energy conservation specialists located in Portola Valley produced no matches.

Weather Forecast for Portola Valley, CA [5]

Tue Nov 12
72°F
Overcast Clouds
Min: 63°F
Max: 72°F
Calm: 3 mps WNW
Precip.: n/a
Humidity: 27%
Cloud cover: 100%
Wed Nov 13
68°F
Overcast Clouds
Min: 60°F
Max: 73°F
Calm: 1 mps NW
Precip.: n/a
Humidity: 35%
Cloud cover: 100%
Thu Nov 14
63°F
Overcast Clouds
Min: 57°F
Max: 68°F
Calm: 3 mps S
Precip.: n/a
Humidity: 60%
Cloud cover: 99%
Fri Nov 15
59°F
Overcast Clouds
Min: 54°F
Max: 66°F
Light breeze: 4 mps NW
Precip.: n/a
Humidity: 67%
Cloud cover: 100%
Sat Nov 16
65°F
Sky Is Clear
Min: 56°F
Max: 73°F
Calm: 1 mps NNW
Precip.: n/a
Humidity: 41%
Cloud cover: 6%
Sun Nov 17
66°F
Sky Is Clear
Min: 57°F
Max: 74°F
Calm: 1 mps NNW
Precip.: n/a
Humidity: 29%
Cloud cover: 3%

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 Solar Power

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.

Did you know?

Some tax incentives and rebate programs are designed to spur the use of solar energy. These vary by location.

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References