Berwyn, Illinois, in the United States offers varying potential for solar energy production throughout the year, with its location in the Northern Temperate Zone providing distinct seasonal patterns in solar PV output.

Seasonal Solar Production

Solar panels in Berwyn generate their highest electricity output during summer months, producing an average of 6.25 kWh per day for each kilowatt of installed capacity. Spring follows as the second most productive season with 5.26 kWh/day per kW installed. Production drops significantly in autumn to 3.32 kWh/day and reaches its lowest point in winter with just 1.99 kWh/day per kW of installed capacity.

For fixed panel installations in Berwyn, the ideal angle to maximize year-round solar production is 36 degrees facing South. This optimized tilt balances energy production across seasons, capturing more sunlight during both peak summer months and the challenging winter period.

Environmental and Weather Considerations

Several environmental factors can impact solar production in Berwyn. The Chicago area's notorious winters bring heavy snowfall that can cover panels and significantly reduce output during December through February. The region also experiences approximately 125 cloudy days annually, which temporarily reduces generation capacity.

Urban pollution and particulate matter from nearby Chicago can accumulate on panels, potentially reducing efficiency by 5-10% if not addressed. Additionally, Berwyn experiences occasional severe weather including thunderstorms and hail during spring and summer months that could potentially damage installations.

Preventative Measures

• Install panels at the recommended 36-degree tilt, which also helps snow slide off more easily
• Implement regular cleaning schedules, especially after winter snow events
• Use microinverters or power optimizers to minimize the impact of partial shading
• Select hail-resistant panels with tempered glass that can withstand local weather conditions
• Consider snow guards for roof safety while ensuring they don't create additional shading

Despite these challenges, Berwyn's strong summer and spring production makes solar viable, particularly with systems designed to account for the seasonal variations. The substantial difference between summer and winter production (over 3x higher in summer) suggests that oversizing systems to meet winter needs or implementing hybrid energy solutions might be beneficial for year-round energy independence.

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 Berwyn, Illinois

Seasonal solar PV output for Latitude: 41.839, Longitude: -87.7892 (Berwyn, Illinois, 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 36° South in Berwyn, Illinois, United States

To maximize your solar PV system's energy output in Berwyn, Illinois, United States (Lat/Long 41.839, -87.7892) throughout the year, you should tilt your panels at an angle of 36° 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 Berwyn, Illinois, 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 Berwyn, Illinois, United States. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 36° South tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
26° South in Summer	45° South in Autumn	56° South in Winter	35° 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 Berwyn, Illinois, 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 Berwyn, Illinois, 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 Berwyn, Illinois, United States

The topography around Berwyn, Illinois is predominantly flat, characteristic of the Chicago metropolitan area which sits on the vast glacial plain that extends from the Great Lakes region. Berwyn itself has an elevation of approximately 607 feet (185 meters) above sea level, with minimal variation throughout the city and surrounding areas. This flat terrain is a result of glacial activity during the last ice age, which smoothed the landscape and deposited till and sediment, creating the level topography seen today. The area is situated within the Chicago Plain, part of the larger Great Lakes Plain physiographic region. This region was once the bottom of glacial Lake Chicago, the ancestor of present-day Lake Michigan, which explains the remarkably level terrain. The landscape features subtle changes in elevation, with some areas displaying gentle slopes or slight depressions, but nothing that would constitute significant hills or valleys.

Hydrological Features

The Des Plaines River flows several miles west of Berwyn, representing one of the few natural interruptions to the otherwise uniform topography. The Chicago River system is located to the east. These waterways have carved shallow valleys into the glacial plain, creating some of the only natural relief in the region. Several small creeks and drainage channels also cross the area, but these have minimal impact on the overall topography.

Urban Development Impact

It's important to note that the natural topography has been significantly altered by urban development. The Chicago metropolitan area, including Berwyn, is densely populated and heavily built up. Streets, buildings, and infrastructure have modified the original landscape, creating an urban topography that overlays the natural one. This urban development means that much of the land is covered with impervious surfaces like concrete and asphalt.

Potential Solar PV Development Areas

For large-scale solar PV development, the flat terrain of the region is generally favorable from a topographical perspective. However, the dense urban development around Berwyn presents significant constraints for utility-scale solar installations. The most suitable areas would be found farther from the urban core, in the more rural portions of Cook County and adjacent counties, particularly to the south and southwest where: 1. The terrain remains flat and open, offering optimal conditions for solar panel placement without costly grading or earthwork. 2. Agricultural lands and former industrial sites provide larger contiguous parcels that could accommodate commercial-scale solar farms. 3. The suburban fringe areas, where development becomes less dense, offer potential brownfield sites that could be repurposed for solar energy production. The communities of Lemont, Palos Hills, and areas near the Des Plaines River Conservation Area present more opportunities for larger solar installations due to their less intensive development patterns while still benefiting from the same favorable flat topography. The extensive network of transportation corridors radiating from Chicago, including railway lines and highways, also presents potential linear development opportunities for solar PV, where long strips of land adjacent to these rights-of-way could be utilized for solar installations. While the immediate vicinity of Berwyn is too densely developed for large-scale solar farms, the broader regional topography remains well-suited for solar energy development in areas where sufficient undeveloped land can be found, particularly in the southwestern suburbs and exurban areas of the Chicago metropolitan region.

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.