Monroe, Washington, United States offers varying potential for solar PV energy generation throughout the year, with significant seasonal fluctuations. This northern temperate zone location experiences strong production in summer months but considerably reduced output during winter.

Seasonal Solar Production

Solar panels in Monroe generate their highest output during summer, producing an impressive 7.30kWh per day for each kilowatt installed. Spring follows as the second most productive season with 5.53kWh/day. However, production drops substantially during autumn to 2.76kWh/day, and reaches its lowest point in winter at just 1.35kWh/day per kilowatt installed.

This pattern creates a more than five-fold difference between the best and worst seasons, indicating that while summer production is excellent, winter output is quite limited. Spring and summer combined account for the majority of annual solar energy generation at this location.

Optimal Panel Installation

For fixed solar panel installations in Monroe, the ideal tilt angle is 40 degrees facing South. This specific angle maximizes year-round energy production by optimizing exposure to the sun's position throughout the seasons. The angle accounts for Monroe's northern latitude and the sun's varying elevation throughout the year.

Environmental and Weather Considerations

Several factors may impact solar production in Monroe. The Pacific Northwest's cloudy and rainy climate, particularly during fall and winter months, significantly reduces solar radiation reaching panels. Monroe averages 155 rainy days annually, with concentrated precipitation from October through March coinciding with already low seasonal production.

Additionally, Monroe's location near the Cascade Mountains can experience occasional fog and low cloud cover, further reducing solar efficiency. During winter, snow accumulation may temporarily cover panels, though the area typically receives moderate snowfall.

Preventative Measures

To maximize solar production despite these challenges, consider these solutions:

• Install panels at the optimal 40-degree tilt to promote snow shedding and maximize year-round production
• Use high-efficiency panels specifically designed for diffuse light conditions common in cloudy environments
• Implement a regular cleaning schedule, especially after winter storms
• Consider micro-inverters or power optimizers to minimize the impact when portions of the array are shaded
• Slightly oversizing the system can help compensate for the significant seasonal variation

While Monroe isn't ideal for year-round solar production compared to sunnier regions, properly designed systems can still provide significant energy, particularly during the productive spring and summer months when daylight hours are extended and skies are clearer.

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 Monroe, Washington

Seasonal solar PV output for Latitude: 47.8554, Longitude: -121.971 (Monroe, Washington, 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 40° South in Monroe, Washington, United States

To maximize your solar PV system's energy output in Monroe, Washington, United States (Lat/Long 47.8554, -121.971) throughout the year, you should tilt your panels at an angle of 40° 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 Monroe, Washington, 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 Monroe, Washington, United States. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 40° 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 Monroe, Washington, 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 Monroe, Washington, 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 Monroe, Washington, United States

Monroe, Washington is situated in the picturesque western foothills of the Cascade Mountain Range in Snohomish County. The topography surrounding Monroe is characterized by a diverse landscape that transitions from the relatively flat Snohomish River valley in the west to increasingly elevated and undulating terrain as one moves eastward toward the Cascade Mountains. The city itself sits at an elevation of approximately 70 meters (230 feet) above sea level, nestled along the banks of the Skykomish River, which flows through the northern part of the community. This river valley creates a notable flat plain that extends through much of the developed area of Monroe.

Valley and Lowland Areas

The immediate surroundings of Monroe feature the broad Snohomish River valley, with fertile alluvial soils that have historically supported agricultural activities. This valley floor represents some of the flattest terrain in the region, with minimal slope and good southern exposure in many sections. The valley floor extends primarily to the west and northwest of Monroe, creating extensive open spaces.

Foothills and Rising Terrain

To the east and southeast of Monroe, the landscape begins to rise more dramatically into the foothills of the Cascade Range. These areas are characterized by rolling hills with moderate slopes that gradually increase in elevation. The terrain becomes increasingly rugged with numerous small valleys, ridgelines, and plateaus. These foothills typically range from 100-300 meters (330-980 feet) in elevation near Monroe, but rise much higher as one continues eastward.

Mountain Influence

The proximity to the Cascade Mountains significantly influences the overall topography. The mountains themselves begin in earnest approximately 20-30 kilometers east of Monroe, with peaks reaching well over 1,500 meters (4,900 feet). This mountainous backdrop creates a dramatic eastern horizon and influences local weather patterns, including precipitation and cloud cover.

Waterways and Drainage

Besides the Skykomish River, numerous smaller streams and creeks cut through the landscape, creating natural drainage channels and small valleys throughout the area. These waterways have carved subtle variations in the topography over time, resulting in occasional bluffs and terraced landscapes, particularly along the river valleys.

Solar PV Suitability

For large-scale solar photovoltaic installations, the most suitable areas near Monroe would be found in the following locations: The flat, open areas of the Snohomish River valley to the west and northwest of Monroe offer ideal terrain for large-scale solar installations. These locations provide minimal topographic shading, good drainage, and relatively easy access for construction and maintenance. The valley floors present fewer engineering challenges for installation and typically require less site preparation. Some of the gently sloping south-facing hillsides in the foothills east of Monroe could also be suitable candidates. These areas often receive good solar exposure throughout the day, particularly those with southern or southwestern aspects. The moderate slopes can actually be advantageous in northern latitudes, as they can optimize the angle of solar collection. Areas that have been previously cleared for agriculture or other development would minimize environmental impact and land conversion costs. Several such areas exist in the broader valley regions surrounding Monroe. However, it's important to note that the region does face some challenges for solar development. The proximity to the Cascade Mountains means that eastern sites may experience morning shading, while the overall climate of western Washington includes significant cloud cover during winter months. Additionally, the increasing forest cover and steeper slopes as one moves eastward limit suitable locations in those directions. The most promising large-scale solar PV locations would therefore be concentrated in the western portions of the Monroe area, where the combination of flat terrain, open spaces, and minimal natural shading creates the most favorable conditions for solar energy collection, despite the region's overall moderate solar resource compared to other parts of the United States.

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.