Glendora, California, situated in the Northern Sub Tropics, offers a generally favorable location for solar PV energy generation throughout the year. The city's geographical position at 34.1535° N latitude and -117.8457° W longitude provides ample sunlight for photovoltaic systems to operate efficiently.
Seasonal Solar Performance
Solar energy production in Glendora varies significantly across seasons. Summer stands out as the peak period, with an impressive daily output of 8.37 kWh per kW of installed solar capacity. Spring follows closely, generating 7.72 kWh/day. Autumn sees a moderate decrease to 5.54 kWh/day, while winter experiences the lowest production at 3.97 kWh/day per kW installed.
The substantial difference between summer and winter production highlights the impact of seasonal variations on solar energy generation in this location. However, even during the least productive season, the output remains sufficient to contribute meaningfully to energy needs.
Optimal Panel Installation
For those considering a fixed panel installation in Glendora, the ideal tilt angle to maximize year-round solar production is 30 degrees facing South. This angle optimizes the panels' exposure to sunlight throughout the year, accounting for the Earth's elliptical orbit and the location's specific latitude.
Environmental Considerations
While Glendora generally presents favorable conditions for solar energy production, there are a few environmental factors to consider:
- Smog and air pollution from the greater Los Angeles area can occasionally reduce solar irradiance.
- Wildfires, which are not uncommon in Southern California, can temporarily decrease solar efficiency due to smoke and ash in the air.
To mitigate these issues, regular panel cleaning and maintenance are crucial. Installing a monitoring system can help detect any unexpected drops in performance, allowing for prompt intervention. Additionally, choosing high-quality panels with anti-soiling coatings can help maintain efficiency in dusty or polluted conditions.
Despite these challenges, Glendora's climate and abundant sunshine make it an excellent location for solar PV systems, with the potential for significant energy production throughout the year.
Note: The Northern Sub Tropics extend from 23.5° latitude North up to 35° latitude.
So far, we have conducted calculations to evaluate the solar photovoltaic (PV) potential in 4253 locations across the United States. This analysis provides insights into each city/location's potential for harnessing solar energy through PV installations.
Link: Solar PV potential in the United States by location
Solar output per kW of installed solar PV by season in Glendora
Seasonal solar PV output for Latitude: 34.1535, Longitude: -117.8457 (Glendora, United States), based on our analysis of 8760 hourly intervals of solar and meteorological data (one whole year) retrieved for that set of coordinates/location from NASA POWER (The Prediction of Worldwide Energy Resources) API:
 
Ideally tilt fixed solar panels 30° South in Glendora, United States
To maximize your solar PV system's energy output in Glendora, United States (Lat/Long 34.1535, -117.8457) throughout the year, you should tilt your panels at an angle of 30° South for fixed panel installations.
As the Earth revolves around the Sun each year, the maximum angle of elevation of the Sun varies by +/- 23.45 degrees from its equinox elevation angle for a particular latitude. Finding the exact optimal angle to maximise solar PV production throughout the year can be challenging, but with careful consideration of historical solar energy and meteorological data for a certain location, it can be done precisely.
We use our own calculation, which incorporates NASA solar and meteorological data for the exact Lat/Long coordinates, to determine the ideal tilt angle of a solar panel that will yield maximum annual solar output. We calculate the optimal angle for each day of the year, taking into account its contribution to the yearly total PV potential at that specific location.
Seasonally adjusted solar panel tilt angles for Glendora, United States
If you can adjust the tilt angle of your solar PV panels, please refer to the seasonal tilt angles below for optimal solar energy production in Glendora, United States. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 30° South tilt angle throughout the year.
| Overall Best Summer Angle | Overall Best Autumn Angle | Overall Best Winter Angle | Overall Best Spring Angle |
|---|---|---|---|
| 18° South in Summer | 39° South in Autumn | 49° South in Winter | 27° South in Spring |
Our recommendations take into account more than just latitude and Earth's position in its elliptical orbit around the Sun. We also incorporate historical solar and meteorological data from NASA's Prediction of Worldwide Energy Resources (POWER) API to assign a weight to each ideal angle for each day based on its historical contribution to overall solar PV potential during a specific season.
This approach allows us to provide much more accurate recommendations than relying solely on latitude, as it considers unique weather conditions in different locations sharing the same latitude worldwide.
Calculate solar panel row spacing in Glendora, United States
We've added a feature to calculate minimum solar panel row spacing by location. Enter your panel size and orientation below to get the minimum spacing in Glendora, United States.
Our calculation method
- Solar Position:
We determine the Sun's position on the Winter solstice using the location's latitude and solar declination. - Shadow Projection:
We calculate the shadow length cast by panels using trigonometry, considering panel tilt and the Sun's elevation angle. - Minimum Spacing:
We add the shadow length to the horizontal space occupied by tilted panels.
This approach ensures maximum space efficiency while avoiding shading during critical times, as the Winter solstice represents the worst-case scenario for shadow length.
Topography for solar PV around Glendora, United States
Glendora, located in Los Angeles County, California, is nestled at the base of the San Gabriel Mountains. The topography of the area is characterized by a blend of flat urban landscapes and rolling foothills that gradually rise into the rugged mountain terrain. The southern part of Glendora, closest to the city center, is predominantly flat or gently sloping. This area is largely developed with residential neighborhoods, commercial districts, and urban infrastructure. As you move northward, the terrain becomes more varied and begins to climb in elevation. The foothills of the San Gabriel Mountains form a transitional zone between the urban flatlands and the steep mountain slopes. These foothills feature undulating terrain with numerous small canyons and ridges. Many of Glendora's more upscale neighborhoods are built into these scenic hillsides, offering residents panoramic views of the Los Angeles Basin. Further north, the landscape becomes increasingly rugged as it transitions into the San Gabriel Mountains proper. This mountainous area is part of the Angeles National Forest and features steep slopes, deep canyons, and rocky outcrops. The highest nearby peak is Mount Baldy, which reaches an elevation of over 10,000 feet.
Potential Areas for Large-Scale Solar PV
When considering areas near Glendora for large-scale solar PV installations, the most suitable locations would likely be found to the east and northeast of the city, in the more arid regions of San Bernardino County. These areas offer several advantages for solar energy production: Firstly, they receive abundant sunlight throughout the year, with fewer cloudy days compared to coastal regions. The climate is typically hot and dry, which is ideal for solar panel efficiency. Secondly, these areas feature vast stretches of relatively flat, undeveloped land. The Mojave Desert, which begins about 40 miles northeast of Glendora, provides extensive open spaces that could accommodate large solar farms without significant conflicts with urban development or agriculture. Thirdly, the sparse vegetation and lack of tall structures in these desert regions mean there are fewer obstacles to cast shadows on solar panels, maximizing their exposure to sunlight throughout the day. However, it's important to note that any large-scale solar project would need to consider environmental impacts, particularly on desert ecosystems. Additionally, the distance from major population centers like Glendora would require investment in transmission infrastructure to efficiently deliver the generated power to consumers.United States solar PV Stats as a country
United States ranks 2nd in the world for cumulative solar PV capacity, with 95,209 total MW's of solar PV installed. This means that 3.40% of United States's total energy as a country comes from solar PV (that's 26th in the world). Each year United States is generating 289 Watts from solar PV per capita (United States ranks 15th in the world for solar PV Watts generated per capita). [source]
Are there incentives for businesses to install solar in United States?
Yes, there are several incentives for businesses wanting to install solar energy in the United States. These include federal tax credits, state and local rebates, net metering policies, and renewable energy certificates (RECs). Additionally, many states have enacted legislation that requires utilities to purchase a certain amount of electricity from renewable sources such as solar.
Do you have more up to date information than this on incentives towards solar PV projects in United States? Please reach out to us and help us keep this information current. Thanks!
Citation Guide
Article Details for Citation
Author: Aaron Robinson
Publisher: profileSOLAR.com
First Published: Saturday 30th of November 2024
Last Updated: Monday 21st of July 2025
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Compare this location to others worldwide for solar PV potential
The solar PV analyses available on our website, including this one, are offered as a free service to the global community. Our aim is to provide education and aid informed decision-making regarding solar PV installations.
However, please note that these analyses are general guidance and may not meet specific project requirements. For in-depth, tailored forecasts and analysis crucial for feasibility studies or when pursuing maximum ROI from your solar projects, feel free to contact us; we offer comprehensive consulting services expressly for this purpose.
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Calculate Your Optimal Solar Panel Tilt Angle: A Comprehensive Guide
Enhance your solar panel's performance with our in-depth guide. Determine the best tilt angle using hard data, debunk common misunderstandings, and gain insight into how your specific location affects solar energy production.




