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Solar Energy in Saint Helena, CA

Solar Energy in Saint Helena

Sorry, historical solar radition values for Saint Helena are currently unavailable, please check back later.

Solar Panels in Saint Helena

Solar panels in Saint Helena that are tilted toward the equator at an angle equal to the current latitude will produce the maximum solar energy output. [More]

Sunrise & Sunset in Saint Helena

The total length of the day in Saint Helena, CA today (May 08, 2021) will be 14 hours and 05 minutes. [More]

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Saint Helena, CA Solar Energy

Solar Power in Saint Helena, CA

Solar Energy Data in Saint Helena, CA

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

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


Solar Energy Analysis for Saint Helena, CA

Solar Radiation Data in Saint Helena

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

Saint Helena has an average monthly Global Horizontal Irradiance (GHI) of 4.99 kilowatt hours per square meter per day (kWh/m2/day), which is approximately 13% less than the average monthly Direct Normal Irradiance (DNI) of 5.71 kWh/m2/day. [1]

Solar installations in Saint Helena that are always titled at the latitude of Saint Helena (Average Tilt at Latitude or ATaL) average 5.71 kWh/m2/day, or about 14% greater than the average monthly GHI of 4.99 kWh/m2/day and approximately equal to the average monthly DNI of 5.71 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 Saint Helena

Solar Radiation Data in Saint Helena, CA

See the chart below for monthly solar radiation levels in Saint Helena.

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

Solar Radiation Analysis for Saint Helena, CA

Solar Radiation Data in Saint Helena

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

Historical solar radiation data for Saint Helena is not currently available.

Please check back later.

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Solar Power Comparison: Saint Helena vs. the U.S.

Solar Power Levels in Saint Helena

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 Saint Helena 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 Saint Helena

Sunrise / Sunset in Saint Helena

  • Sunrise/Sunset for May 08, 2021 [2]
    • Sunrise: 1:03 pm
    • Sunset: 3:08 am
    • Solar Noon: 8:06 pm
    • Length of Day: 14:05
Solar Energy Statistics for Saint Helena

Best Months for Solar in Saint Helena

  • Top Solar Power Months Historically [1]
    • Solar Radiation n/a
    • ATaL: July (7.37 kWh/m2/day)
    • DNI: July (8.46 kWh/m2/day)
    • GHI: July (7.96 kWh/m2/day)

* See glossary & definitions above.

Solar Panel Installs in Saint Helena

We do not currently have data on solar panel installations in the city of Saint Helena, CA at this current time.

However, Saint Helena is in Napa County and Napa County has at least 0 solar insallations right now. [1]

Solar Power Output in Saint Helena

The Power of Solar in Saint Helena, CA

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

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

Solar Output Analysis for Saint Helena, CA

Solar Radiation Data in Saint Helena

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

Historical solar radiation data for Saint Helena is not currently available.

Please check back later.

Cost of Utilities in Saint Helena

Saint Helena Electricity Costs

Electricity prices (residential) in Saint Helena averaged 22.53 cents per kilowatthour (¢/kWh) in February 2021, which was about 69% more than the overall U.S. average residential electricity rate of 13.34¢/kWh in February. [3]

Solar Power Poll: Saint Helena

Vote now: Given all of the data and analysis provided for Saint Helena, is solar power a good choice for residents of this city?

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

Saint Helena Natural Gas Costs

Natural gas prices (residential) in California averaged $15.60 per thousand cubic feet (Mcf) in February 2021, which was approximately 63% more than the overall U.S. average residential natural gas rate of $9.55 per Mcf in February. [4]

Weather Forecast for Saint Helena, CA [5]

Sat May 8
85°F
Sky Is Clear
Min: 54°F
Max: 85°F
Moderate breeze: 14 mps N
Precip.: n/a
Humidity: 14%
Cloud cover: 0%
Sun May 9
82°F
Overcast Clouds
Min: 54°F
Max: 84°F
Gentle Breeze: 7 mps WSW
Precip.: n/a
Humidity: 21%
Cloud cover: 98%
Mon May 10
87°F
Sky Is Clear
Min: 58°F
Max: 88°F
Moderate breeze: 16 mps N
Precip.: n/a
Humidity: 7%
Cloud cover: 0%
Tue May 11
92°F
Sky Is Clear
Min: 60°F
Max: 92°F
Gentle Breeze: 8 mps WSW
Precip.: n/a
Humidity: 11%
Cloud cover: 6%
Wed May 12
89°F
Overcast Clouds
Min: 54°F
Max: 89°F
Gentle Breeze: 8 mps SW
Precip.: n/a
Humidity: 14%
Cloud cover: 92%
Thu May 13
88°F
Sky Is Clear
Min: 53°F
Max: 88°F
Gentle Breeze: 9 mps SW
Precip.: n/a
Humidity: 14%
Cloud cover: 0%

More about Saint Helena

About Saint Helena

The city of Saint Helena, CA in Napa County has an approximate population of 5,814. [6]

Saint Helena Solar Power

Saint Helena, CA Solar Energy

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

Did you know?

Solar cells convert sunlight into electricity through a physical process known as the photovoltaic effect.

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References