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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 (May 26, 2020) will be 14 hours and 28 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 May 26, 2020 [2]
    • Sunrise: 12:51 pm
    • Sunset: 3:20 am
    • Solar Noon: 8:06 pm
    • Length of Day: 14:28
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 21.70 cents per kilowatthour (¢/kWh) in February 2020, which was about 69% more than the overall U.S. average residential electricity rate of 12.85¢/kWh in February. [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 $14.55 per thousand cubic feet (Mcf) in February 2020, which was approximately 57% more than the overall U.S. average residential natural gas rate of $9.26 per Mcf in February. [4]

Latest Solar News

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Weather Forecast for Portola Valley, CA [5]

Mon May 25
69°F
Sky Is Clear
Min: 65°F
Max: 69°F
Calm: 1 mps SW
Precip.: n/a
Humidity: 72%
Cloud cover: 1%
Tue May 26
82°F
Sky Is Clear
Min: 61°F
Max: 82°F
Light breeze: 6 mps NW
Precip.: n/a
Humidity: 37%
Cloud cover: 0%
Wed May 27
81°F
Sky Is Clear
Min: 55°F
Max: 81°F
Light breeze: 7 mps WNW
Precip.: n/a
Humidity: 34%
Cloud cover: 10%
Thu May 28
77°F
Broken Clouds
Min: 56°F
Max: 77°F
Light breeze: 6 mps WNW
Precip.: n/a
Humidity: 41%
Cloud cover: 52%
Fri May 29
72°F
Overcast Clouds
Min: 55°F
Max: 72°F
Gentle Breeze: 8 mps SSW
Precip.: n/a
Humidity: 46%
Cloud cover: 90%
Sat May 30
63°F
Light Rain
Min: 50°F
Max: 63°F
Moderate breeze: 13 mps SSW
Precip.: Chance of Rain
Humidity: 66%
Cloud cover: 73%

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?

Nineteen-year-old Edmund Becquerel, a French experimental physicist, discovered the basis of solar energy in 1839.

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References