Tualatin, Oregon, United States, located at 45.3716, -122.7656, offers varying potential for solar PV energy generation throughout the year. This location in the Northern Temperate Zone experiences significant seasonal fluctuations in solar energy production.

Seasonal Solar Production

Solar panels in Tualatin demonstrate strong performance during summer months, generating approximately 7.12kWh per day for each kilowatt of installed capacity. Spring also provides good generation at 5.46kWh/day per kW. However, production drops considerably during autumn (2.90kWh/day) and reaches its lowest point in winter, when panels produce only 1.36kWh/day per kW installed.

This pattern creates a substantial difference between summer and winter production - summer generates more than five times the electricity compared to winter months. The location is therefore most ideal for solar generation from late spring through early fall, with May through September likely offering the most consistent high production.

Optimal Panel Installation

For fixed solar panel installations in Tualatin, the ideal tilt angle to maximize year-round production is 37 degrees facing South. This specific angle optimizes the annual solar collection based on Tualatin's northern hemisphere location and seasonal sun paths.

Environmental and Weather Considerations

Several significant factors can impact solar production in Tualatin:

• Pacific Northwest cloud cover and rainfall, particularly pronounced during winter months, contribute to the low winter production figures
• Morning fog common in the Willamette Valley region can delay peak production hours
• Potential wildfire smoke during late summer months in recent years can temporarily reduce solar efficiency
• Tree coverage in this heavily wooded region may create shading issues for residential installations

To mitigate these challenges, solar installations in Tualatin should incorporate several preventative measures:

• Careful site selection avoiding tree shading, particularly from the south
• Regular panel cleaning to remove pollen, dust and ash deposits
• Using high-efficiency panels that perform better in diffuse light conditions
• Considering micro-inverters or power optimizers to minimize production losses from partial shading
• Designing systems with winter production limitations in mind, potentially oversizing arrays to meet year-round needs

While Tualatin's solar potential has significant seasonal variation, properly designed systems can still provide substantial renewable energy contribution, particularly when optimized for the local conditions.

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 Tualatin

Seasonal solar PV output for Latitude: 45.3716, Longitude: -122.7656 (Tualatin, 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 37° South in Tualatin, United States

To maximize your solar PV system's energy output in Tualatin, United States (Lat/Long 45.3716, -122.7656) throughout the year, you should tilt your panels at an angle of 37° 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 Tualatin, 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 Tualatin, United States. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 37° South tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
29° South in Summer	48° South in Autumn	59° South in Winter	38° 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 Tualatin, 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 Tualatin, 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 Tualatin, United States

Tualatin, Oregon sits in the Tualatin Valley, part of the larger Willamette Valley region located west of Portland. The landscape around Tualatin is characterized by gentle rolling terrain with elevations generally ranging between 100 and 500 feet above sea level. The city itself lies at a relatively flat elevation of approximately 120 feet. The topography of the area was largely shaped by massive ice-age floods and subsequent river action. The Tualatin River meanders through the valley, creating a natural boundary along portions of the city. This river valley creates some of the lower elevations in the immediate area, with gradual slopes rising away from the riverbanks.

Surrounding Geographic Features

To the west of Tualatin rise the Chehalem Mountains, with peaks reaching about 1,600 feet. These mountains form a natural boundary between the Tualatin Valley and the Coast Range beyond. To the south lie the gentle Parrett Mountain and the more prominent Tualatin Mountains (also known as the West Hills), which separate the Tualatin Valley from downtown Portland. The eastern landscape transitions into the more urbanized areas of Tigard and Lake Oswego, maintaining similar rolling hill characteristics. North of Tualatin, the terrain continues as part of the valley floor before eventually rising toward the West Hills.

Solar Potential Areas

For large-scale solar photovoltaic development, several nearby areas present favorable conditions based on topographical features: The gently sloping agricultural lands southwest of Tualatin, extending toward Sherwood and Newberg, offer expansive, relatively flat terrain with good southern exposure. These areas have fewer tree canopies and urban development compared to the immediate Tualatin vicinity. The plateau areas north of the Tualatin River, extending toward Beaverton, provide elevated flat surfaces that would minimize shadowing effects. These locations offer good solar access with minimal topographical barriers to sunlight. Some of the south-facing slopes of the gentle hills northwest of Tualatin could also be suitable, particularly those with cleared land that isn't heavily forested. These areas benefit from favorable orientation toward the sun's path.

Topographical Challenges

Despite these opportunities, the region does present certain topographical challenges for solar development. The Tualatin Valley experiences some natural shadowing from the surrounding mountain formations, particularly during winter months when the sun angle is lower. The Chehalem Mountains to the west and the Tualatin Mountains to the south create afternoon and morning shadows respectively during certain seasons. Additionally, the river valley areas, while flat, can experience more fog and moisture accumulation due to their lower elevation, potentially reducing solar efficiency during certain weather patterns. The region's varied topography means that site-specific assessment would be crucial for any large-scale solar implementation, with particular attention to elevation, slope orientation, and surrounding natural features that might impact solar access throughout the year.

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.