Sunnyside, Washington shows moderate potential for year-round solar energy generation, though with significant seasonal variation typical of its Northern Temperate Zone location at coordinates 46.3215, -120.0156.

Seasonal Solar Performance

The solar output data reveals a clear pattern of seasonal energy production. Summer delivers the strongest performance at 7.67 kWh per day per installed kilowatt, making it the peak season for solar generation. Spring follows as the second-best season with 6.03 kWh per day per kilowatt, offering excellent energy production potential. Autumn shows a notable decline to 3.16 kWh per day per kilowatt, while winter presents the most challenging conditions with only 1.55 kWh per day per kilowatt. This dramatic seasonal swing from summer highs to winter lows is characteristic of locations at this latitude.

Optimal Installation Configuration

For maximum year-round energy production at this Sunnyside location, solar panels should be installed at a fixed tilt angle of 38 degrees facing south. This angle has been calculated to optimize total annual solar output by accounting for the sun's changing position throughout the year and weighting the angles based on actual solar irradiance data.

Local Factors Affecting Solar Production

Several environmental and weather factors in the Sunnyside area could impact solar panel performance:

• Dust and agricultural particulates from surrounding farming operations
• Potential for snow accumulation during winter months
• Regional wildfire smoke during summer fire seasons
• High summer temperatures that can reduce panel efficiency

Preventative Measures for Better Performance

To maximize solar energy production despite these challenges, several installation strategies can help. Regular cleaning schedules become particularly important in this agricultural region to remove dust and debris that accumulates on panel surfaces. Installing panels with adequate spacing and proper ventilation helps combat efficiency losses from high summer temperatures. For winter snow concerns, steeper mounting angles and smooth panel surfaces can encourage natural snow shedding. Additionally, choosing panels with anti-reflective coatings can help maintain performance during hazy conditions caused by seasonal smoke. Overall, while Sunnyside presents good solar potential during spring and summer months, the significant winter production drop and local environmental factors require careful planning and maintenance to achieve optimal year-round performance.

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 Sunnyside

Seasonal solar PV output for Latitude: 46.3215, Longitude: -120.0156 (Sunnyside, 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 38° South in Sunnyside, United States

To maximize your solar PV system's energy output in Sunnyside, United States (Lat/Long 46.3215, -120.0156) throughout the year, you should tilt your panels at an angle of 38° 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 Sunnyside, 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 Sunnyside, United States. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 38° 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	60° 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 Sunnyside, 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 Sunnyside, 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 Sunnyside, United States

Topographical Features of the Sunnyside Region

Sunnyside sits in the heart of Washington State's Yakima Valley, positioned within a broad agricultural basin that extends across south-central Washington. The surrounding landscape is characterized by relatively flat to gently rolling terrain, with the community nestled at an elevation of approximately 750 feet above sea level. This positioning places Sunnyside on the valley floor of what geographers recognize as part of the larger Columbia River drainage system.

The immediate topography around Sunnyside consists primarily of fertile alluvial plains that have been shaped by centuries of sediment deposition from the Yakima River and its tributaries. These plains stretch for miles in multiple directions, creating expansive areas of level ground that are currently utilized for intensive agriculture, including orchards, vineyards, and row crops. The terrain exhibits minimal elevation changes across large swaths of land, with gradual slopes that rarely exceed a few degrees from horizontal.

To the west and northwest of Sunnyside, the landscape begins to rise toward the foothills of the Cascade Range, though these elevated areas remain at considerable distance from the immediate vicinity. The eastern approaches feature similar flat agricultural lands that extend toward the Horse Heaven Hills, a low-lying ridge system that forms part of the regional watershed divide. These hills create a natural boundary approximately twenty miles to the south and southeast of the community.

Optimal Areas for Large-Scale Solar Development

The expansive flat agricultural lands surrounding Sunnyside present exceptional opportunities for utility-scale solar photovoltaic installations. The most promising areas lie within a ten to fifteen-mile radius of the community, where thousands of acres of level terrain offer minimal grading requirements and straightforward construction logistics. These areas benefit from existing agricultural road networks that could support construction and maintenance access.

Particularly attractive locations for solar development include the broad plains extending eastward toward Prosser and southward toward the Horse Heaven Hills. These areas combine optimal topographical conditions with proximity to existing electrical transmission infrastructure that serves the agricultural region. The gentle slopes and consistent elevation profiles would minimize earthwork requirements while maximizing solar panel efficiency through proper orientation and spacing.

The agricultural lands northwest of Sunnyside, stretching toward Grandview, represent another prime zone for solar development. This area features extensive flat parcels with excellent southern exposure and minimal topographical obstacles. The existing irrigation infrastructure throughout these agricultural zones also suggests favorable soil conditions and drainage patterns that would support large-scale construction projects.

Areas immediately adjacent to the Yakima River corridor may be less suitable due to potential flooding concerns and environmental restrictions, though the slightly elevated terraces above the floodplain could accommodate solar installations while maintaining appropriate setbacks from sensitive riparian zones. The key advantage throughout the broader Sunnyside region remains the predominance of level terrain that would allow for efficient panel layout and minimal shading between solar arrays.

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.