Solar PV Analysis of Cottage Grove, Oregon, United States
Cottage Grove, Oregon, located in the Northern Temperate Zone, presents a mixed scenario for year-round solar energy generation. With coordinates 43.7831° N, 123.0507° W, this location experiences significant seasonal variations in solar energy production.
Seasonal Solar Performance
Summer stands out as the most productive season, with an impressive 7.64 kWh per day for each kilowatt of installed solar capacity. Spring follows closely, generating 6.12 kWh/day. However, autumn sees a considerable drop to 3.41 kWh/day, while winter performance plummets to a mere 1.68 kWh/day.
These figures indicate that Cottage Grove is most suitable for solar energy production from late spring through early fall. During these months, longer days and higher sun angles contribute to increased energy output. Conversely, the winter months present significant challenges due to shorter days and lower sun angles.
Optimal Panel Installation
To maximize year-round solar production in Cottage Grove, fixed solar panels should be installed at a 36-degree tilt angle facing south. This angle optimizes the panels' exposure to sunlight throughout the year, balancing the varying sun positions across seasons.
Environmental Considerations
While Cottage Grove's location is generally favorable for solar energy, there are some environmental factors to consider:
- Cloud cover: The Pacific Northwest is known for its cloudy weather, particularly in fall and winter. This can significantly reduce solar output during these seasons.
- Rain: Frequent rainfall, especially in the cooler months, can affect panel efficiency and require regular cleaning.
Mitigation Strategies
To address these challenges and enhance solar production, consider the following measures:
- Use high-efficiency panels designed to perform well in low-light conditions.
- Implement a robust cleaning schedule to remove dirt and debris, especially after rainy periods.
- Consider a ground-mounted system with tracking capabilities to maximize sun exposure throughout the day.
- Install micro-inverters or power optimizers to minimize the impact of partial shading on overall system performance.
By implementing these strategies, solar energy systems in Cottage Grove can better cope with the seasonal variations and environmental factors, ensuring more consistent energy production throughout the year.
Note: The Northern Temperate Zone extends from 35° latitude North up to 66.5° 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 Cottage Grove, Oregon
Seasonal solar PV output for Latitude: 43.7831, Longitude: -123.0507 (Cottage Grove, Oregon, 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 36° South in Cottage Grove, Oregon, United States
To maximize your solar PV system's energy output in Cottage Grove, Oregon, United States (Lat/Long 43.7831, -123.0507) throughout the year, you should tilt your panels at an angle of 36° 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 Cottage Grove, Oregon, 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 Cottage Grove, Oregon, United States. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 36° South tilt angle throughout the year.
| Overall Best Summer Angle | Overall Best Autumn Angle | Overall Best Winter Angle | Overall Best Spring Angle |
|---|---|---|---|
| 27° South in Summer | 47° South in Autumn | 58° South in Winter | 36° 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 Cottage Grove, Oregon, 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 Cottage Grove, Oregon, 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 Cottage Grove, Oregon, United States
The topography around Cottage Grove, Oregon, is characterized by a diverse landscape typical of the western Cascade foothills. The town itself is situated in a valley, with the Coast Fork Willamette River running through it. The surrounding area features a mix of gently rolling hills, forested areas, and some steeper terrain as you move towards the Cascade Range to the east.
To the west of Cottage Grove, the land gradually transitions into the Willamette Valley, which is generally flatter and more open. This area is predominantly used for agriculture, with fields and pastures dotting the landscape. As you move east from the town, the terrain becomes more rugged and mountainous, with higher elevations and denser forests.
The region also includes several bodies of water, most notably Dorena Lake and Cottage Grove Lake, which are located to the southeast and southwest of the town, respectively. These reservoirs are surrounded by hilly terrain and forested areas, adding to the scenic beauty of the region.
Areas Suitable for Large-Scale Solar PV
When considering areas nearby that would be most suited to large-scale solar photovoltaic (PV) installations, there are a few key factors to consider. Ideal locations would have relatively flat terrain, good sun exposure, and minimal shading from trees or mountains. Based on these criteria, the following areas near Cottage Grove might be suitable:
The agricultural lands to the west and northwest of Cottage Grove, extending into the Willamette Valley, could be promising for solar PV development. These areas tend to have flatter terrain and fewer obstructions, allowing for maximum sun exposure throughout the day. However, it's important to balance solar development with preserving valuable farmland.
Some of the more gently sloping hillsides to the south and southeast of Cottage Grove might also be suitable, particularly if they have a southern exposure. These areas could potentially offer a good compromise between available land and optimal sun angles.
It's worth noting that while the mountainous areas to the east may have some south-facing slopes that receive good sunlight, the steeper terrain and forested nature of these areas would likely make large-scale solar development more challenging and less economically viable.
Any specific site selection would require detailed analysis of local conditions, including exact topography, shading analysis, and environmental considerations. Additionally, proximity to existing electrical infrastructure and local zoning regulations would play crucial roles in determining the feasibility of large-scale solar PV projects in the area.
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: Friday 9th of August 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.
Helping you assess viability of solar PV for your site
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.
