Lake Stevens, Washington, located in the Northern Temperate Zone, presents a mixed picture for year-round solar energy generation. This location experiences significant seasonal variations in solar potential, which directly impacts the effectiveness of photovoltaic (PV) systems throughout the year.

Seasonal Solar Performance

Summer stands out as the most productive season for solar energy in Lake Stevens, with an impressive daily output of 7.11 kWh per kW of installed solar capacity. Spring follows as the second-best season, generating 5.24 kWh per day. However, the performance drops considerably during autumn and winter, with daily outputs of 2.36 kWh and 1.29 kWh, respectively.

These figures highlight the stark contrast between the peak and off-peak seasons. The long, sunny days of summer provide ideal conditions for solar energy production, while the short, often overcast days of winter significantly reduce the system's efficiency.

Optimal Panel Positioning

To maximize year-round solar energy production in Lake Stevens, fixed solar panels should be tilted at an angle of 39 degrees facing south. This optimal angle ensures the best overall performance across all seasons, balancing the high summer sun with the lower winter sun position.

Environmental and Weather Factors

Several environmental and weather factors can impact solar production in Lake Stevens:

1. Cloud cover: The Pacific Northwest is known for its frequent overcast conditions, especially during fall and winter. This can significantly reduce solar panel efficiency.
2. Rain: Lake Stevens receives considerable rainfall, which can temporarily decrease panel output.
3. Tree shading: The area's lush vegetation may cast shadows on solar panels, reducing their exposure to sunlight.

To mitigate these challenges, consider the following preventative measures:

• Install panels in the sunniest location possible, away from potential shading sources.
• Use micro-inverters or power optimizers to minimize the impact of partial shading.
• Regularly clean panels to remove dirt and debris that may accumulate due to rain and vegetation.
• Consider a ground-mounted system if roof conditions are not ideal.

While Lake Stevens may not be the most ideal location for year-round solar energy production, proper system design and maintenance can still yield significant benefits, especially during the spring and summer months.

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 Lake Stevens

Seasonal solar PV output for Latitude: 48.0132, Longitude: -122.0679 (Lake Stevens, 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 Lake Stevens, United States

To maximize your solar PV system's energy output in Lake Stevens, United States (Lat/Long 48.0132, -122.0679) 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 Lake Stevens, 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 Lake Stevens, 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 Lake Stevens, 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 Lake Stevens, 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 Lake Stevens, United States

The area surrounding Lake Stevens in Washington State, United States, is characterized by a diverse and picturesque topography. The lake itself sits in a shallow basin, formed by glacial activity thousands of years ago. The immediate vicinity of Lake Stevens features gently rolling hills and flat areas, particularly to the west and south of the lake. As you move away from the lake, the terrain becomes more varied. To the east, the land begins to rise more dramatically, with foothills leading towards the Cascade Mountain Range. These hills are often covered in dense evergreen forests, typical of the Pacific Northwest region. The western side of Lake Stevens gradually slopes down towards the Puget Sound lowlands, with a mix of residential areas and pockets of woodland.

Nearby Areas Suitable for Large-Scale Solar PV

When considering locations for large-scale solar photovoltaic (PV) installations near Lake Stevens, several factors come into play. The ideal areas would be relatively flat, receive ample sunlight, and have minimal obstructions such as tall trees or buildings. The most promising locations for solar PV development would likely be found to the west and southwest of Lake Stevens. These areas tend to have more open, cleared land that was previously used for agriculture. The flatter terrain in this direction would make installation and maintenance easier, and there would be less shadowing from nearby hills or mountains. However, it's important to note that the Pacific Northwest, including the Lake Stevens area, experiences significant cloud cover and rainfall throughout much of the year. This climate factor could impact the overall efficiency of solar PV systems. Despite this challenge, advances in solar technology have made it increasingly viable to generate solar power even in regions with less-than-ideal weather conditions. Any large-scale solar project would need to carefully consider local zoning laws, environmental impacts, and the proximity to existing power infrastructure. The areas around Lake Stevens are a mix of residential, commercial, and undeveloped land, so finding suitable sites that meet all necessary criteria would require thorough assessment and planning.

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.