Shoreline, Washington, United States is a location with significant seasonal variation in solar energy production potential. Located in the Northern Temperate Zone, this area experiences distinct differences in solar output throughout the year that impact the effectiveness of solar PV installations.

Seasonal Solar Production

Solar panels in Shoreline produce their highest output during summer months, generating approximately 6.87kWh per day for each kilowatt of installed capacity. Spring follows as the second most productive season with 5.15kWh/day. However, production drops considerably during autumn to 2.47kWh/day and reaches its lowest point in winter at just 1.27kWh/day per installed kilowatt.

This pattern creates a solar production profile that is heavily weighted toward the warmer months. A solar PV system in Shoreline will produce more than five times the electricity in summer compared to winter, making the location somewhat challenging for year-round solar reliance without supplementary power sources.

Optimal Panel Installation

For fixed solar panel installations in Shoreline, the ideal tilt angle to maximize year-round energy production is 39 degrees facing South. This angle represents the mathematically optimal position to capture the most solar energy across all seasons, taking into account the location's latitude and seasonal sun paths.

Environmental and Weather Challenges

Several significant local factors can impede solar production in Shoreline:

• Cloud cover and rainfall: The Pacific Northwest is known for its cloudy, rainy climate, particularly from late autumn through early spring, which directly corresponds to the lower production figures seen in these seasons.
• Fog and marine layer: Shoreline's proximity to Puget Sound can result in morning fog or marine layer that delays full solar production until it burns off.
• Tree coverage: The area has significant tree canopy that can cast shadows on panels, particularly when the sun is at lower angles during fall and winter.
• Snow and frost: While not as common as in other northern regions, occasional snow or frost can temporarily reduce panel efficiency.

Preventative Measures

To maximize solar production despite these challenges, several installation strategies can be employed:

• Strategic panel placement to avoid tree shadows, particularly during winter months when sun angles are lowest
• Regular cleaning to remove pine needles, leaves, and moss that commonly accumulate in this forested region
• Installing panels with anti-soiling coatings that help rain wash away debris
• Considering micro-inverters or power optimizers that minimize the impact of partial shading
• Slightly steeper panel angles than the optimal 39 degrees may help with self-cleaning from rainfall and improve winter production

While Shoreline is not ideal for year-round solar production compared to sunnier regions, properly designed systems can still provide significant energy, particularly from April through September when production is at its highest.

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 Shoreline

Seasonal solar PV output for Latitude: 47.7495, Longitude: -122.2976 (Shoreline, 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 Shoreline, United States

To maximize your solar PV system's energy output in Shoreline, United States (Lat/Long 47.7495, -122.2976) 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 Shoreline, 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 Shoreline, 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
31° South in Summer	50° South in Autumn	62° South in Winter	40° 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 Shoreline, 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 Shoreline, 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 Shoreline, United States

The topography of Shoreline, Washington, nestled in the northwestern United States at approximately 47.7495°N, 122.2976°W, presents a varied landscape shaped by glacial activity and the region's position between Puget Sound and the Cascade Mountains. Shoreline sits on a plateau that gradually slopes westward toward Puget Sound, with elevations ranging from near sea level along the western edge to approximately 500 feet in the eastern portions of the city. The terrain in and around Shoreline features rolling hills, shallow valleys, and several ravines carved by small streams flowing westward to Puget Sound. This undulating landscape was largely formed by glacial deposits during the last ice age, resulting in a mix of glacial till, outwash, and occasional exposed bedrock. The city contains several small watersheds, including Boeing Creek and McAleer Creek, which have created natural drainages throughout the area.

Surrounding Landscape Features

To the west of Shoreline lies Puget Sound, a significant inland waterway with numerous bays and inlets. The shoreline itself features bluffs in many areas, with some steep drops to the water below. Moving eastward from Shoreline, the land gradually rises toward the foothills of the Cascade Mountain Range, which dominates the eastern horizon. The immediate surroundings include the cities of Lake Forest Park to the east, which features more pronounced hills and ravines around Lake Washington, and Edmonds to the north, which has similar rolling terrain. To the south lies Seattle, with its famous hills and lake-carved topography.

Potential Areas for Solar PV Development

When considering areas near Shoreline suitable for large-scale solar photovoltaic installations, several topographical factors come into play. The most favorable locations would be: The eastern portions of Shoreline and neighboring communities where higher elevations provide better exposure to sunlight throughout the day. These elevated plateaus often have fewer tall trees and structures that might cast shadows on solar arrays. Former industrial areas or brownfields in the broader Seattle metropolitan area offer relatively flat terrain with minimal natural vegetation to obstruct sunlight. These areas often have existing infrastructure connections that can support large-scale energy projects. The more level areas of the glacial plateau extending north toward Snohomish County present opportunities for solar development, particularly in locations with south-facing gentle slopes that maximize solar exposure in this northern latitude. Areas east of Shoreline toward the Cascade foothills might offer larger tracts of open land suitable for development, though the increasing elevation means potential for more cloud formation against the mountain slopes. It's worth noting that the Puget Sound region's topography creates microclimates with varying cloud cover patterns. The rain shadow effect of the Olympic Mountains to the west can result in slightly more favorable conditions for solar energy in some areas compared to others, despite their proximity. The rolling nature of the landscape means that site-specific assessment is crucial, as north-facing slopes would be significantly less productive than south-facing ones in this northern latitude. Additionally, the region's glacial history has left some areas with better drainage than others, an important consideration for the long-term stability of ground-mounted solar installations.

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

Tell Us About Your Work

We love seeing how our research helps others! If you've cited this article in your work, we'd be delighted to hear about it. Drop us a line via our Contact Us page or on X, to share where you've used our information - we may feature a link to your work on our site. This helps create a network of valuable resources for others in the solar energy community and helps us understand how our research is contributing to the field. Plus, we occasionally highlight exceptional works that reference our research on our social media channels.

Feeling generous?

Share this with your friends!

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.