Centralia, Washington, located in the Northern Temperate Zone, presents a mixed scenario for solar energy generation via photovoltaic (PV) panels. The location's potential for solar power production varies significantly throughout the year, with notable seasonal fluctuations.

Seasonal Solar Production

Summer stands out as the most productive season, with an impressive daily output of 6.80 kWh per kW of installed solar capacity. Spring follows as the second-best season, generating 5.25 kWh per day. However, the colder months see a substantial drop in energy production. Autumn yields 2.75 kWh per day, while winter experiences the lowest output at just 1.32 kWh daily.

These figures indicate that Centralia's location is particularly favorable for solar energy generation during the warmer months, from late spring through early fall. During this period, longer daylight hours and typically clearer skies contribute to higher solar panel efficiency.

Optimal Panel Installation

To maximize year-round solar production in Centralia, fixed solar panels should be installed at a tilt angle of 39 degrees facing south. This angle has been calculated to optimize energy capture across all seasons, taking into account the Earth's elliptical orbit and the location's specific latitude.

Environmental Considerations

While Centralia's location offers good potential for solar energy, there are some environmental factors to consider:

1. Frequent cloud cover, especially during winter months, can significantly reduce solar panel efficiency.
2. Occasional snowfall in winter may temporarily cover panels, impeding energy production.

To mitigate these issues, consider installing panels at a steeper angle to encourage snow sliding off and use high-efficiency panels that perform better in low-light conditions. Regular maintenance, including snow removal, can also help maintain optimal performance.

In conclusion, while Centralia's location presents challenges for year-round solar energy production, particularly in winter, it offers excellent potential during the warmer months. With proper installation techniques and maintenance, solar PV can be a viable renewable energy option for this area.

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 Centralia

Seasonal solar PV output for Latitude: 46.725, Longitude: -122.9677 (Centralia, 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 39° South in Centralia, United States

To maximize your solar PV system's energy output in Centralia, United States (Lat/Long 46.725, -122.9677) throughout the year, you should tilt your panels at an angle of 39° 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 Centralia, 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 Centralia, United States. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 39° South tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
30° South in Summer	49° South in Autumn	61° South in Winter	39° 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 Centralia, 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 Centralia, United States.

Our calculation method

1. Solar Position:
   We determine the Sun's position on the Winter solstice using the location's latitude and solar declination.
2. Shadow Projection:
   We calculate the shadow length cast by panels using trigonometry, considering panel tilt and the Sun's elevation angle.
3. 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 Centralia, United States

The topography around Centralia, Washington, located at 46.725°N, 122.9677°W, is characterized by a mix of gently rolling hills, river valleys, and forested areas. Situated in the southwestern part of Washington state, Centralia lies within the Chehalis River Valley, which is flanked by low-lying hills and ridges. The landscape is generally undulating, with elevations ranging from about 180 feet above sea level in the valley floor to around 500-600 feet in the surrounding hills. To the west of Centralia, the terrain gradually rises towards the foothills of the Willapa Hills, while to the east, the land becomes more rugged as it approaches the Cascade Mountain Range. The Chehalis River meanders through the area, creating a broad, flat floodplain that has been extensively used for agriculture. Several smaller streams and creeks also crisscross the region, contributing to its varied topography.

Potential Areas for Large-Scale Solar PV

When considering areas near Centralia that might be suitable for large-scale solar photovoltaic (PV) installations, several factors come into play. The ideal locations would have relatively flat or gently sloping terrain, good sun exposure, and minimal shading from nearby hills or forests. The agricultural lands in the Chehalis River Valley, particularly to the south and southwest of Centralia, could potentially be well-suited for solar PV development. These areas offer expansive, open spaces with minimal obstructions to sunlight. The flat terrain would also simplify construction and reduce costs associated with land preparation. Another promising area might be the cleared or sparsely forested hillsides to the north and northeast of Centralia. While these locations may require some grading, they could provide excellent sun exposure due to their elevated positions and southern-facing slopes. It's important to note that while the topography around Centralia offers some potential for solar PV development, the region's climate, characterized by frequent cloud cover and rainfall, may present challenges for solar energy production. Any large-scale solar project in this area would need to carefully consider these factors, along with environmental impacts and local zoning regulations, before proceeding.

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!

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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.