Berkeley, Illinois, United States experiences significant seasonal variation in solar energy production, making it a moderately suitable location for year-round solar PV generation in the Northern Temperate Zone.

Seasonal Solar Performance

The location shows strong summer performance with solar panels generating 6.25 kWh per day per kW of installed capacity. Spring also provides excellent conditions at 5.26 kWh per day per kW. However, winter production drops dramatically to just 2.01 kWh per day per kW, while autumn generates a moderate 3.32 kWh per day per kW. The best times for solar generation at this location are clearly summer and spring months, when panels can produce more than double the energy compared to winter. This seasonal variation is typical for locations at this latitude in the Northern Temperate Zone.

Optimal Panel Configuration

For fixed panel installations at Berkeley, Illinois, the ideal tilt angle is 36 degrees facing south. This angle maximizes total year-round solar production by optimizing the panels' position relative to the sun's path throughout the seasons.

Environmental and Weather Factors

Several local factors could significantly impact solar production at this Illinois location:

• Snow accumulation: Winter weather can cause snow to cover panels, blocking sunlight completely
• Ice formation: Freezing conditions may create ice buildup on panel surfaces
• Midwest weather patterns: The region experiences frequent cloudy periods and storms that reduce solar irradiance
• Agricultural dust: Being in a farming region, airborne dust and pollen can accumulate on panels

Preventative Installation Measures

To maximize energy production despite these challenges, several installation strategies can help: Install panels at the recommended 36-degree tilt angle, which naturally helps snow and ice slide off more easily than flatter installations. Consider mounting panels slightly higher off the roof surface to improve air circulation and reduce ice formation. Choose high-quality panels with anti-reflective coatings that perform better in low-light conditions common during cloudy Midwest weather. Ensure easy access for cleaning to remove dust, pollen, and debris that accumulate throughout the growing season. Install a monitoring system to track production and identify when cleaning or snow removal is needed. Some homeowners also invest in heating elements or automated cleaning systems for panels in areas with heavy snow loads, though the cost-benefit should be carefully evaluated given the already low winter production levels at this latitude.

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 Berkeley, Illinois

Seasonal solar PV output for Latitude: 41.8892, Longitude: -87.9127 (Berkeley, 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 Berkeley, Illinois, United States

To maximize your solar PV system's energy output in Berkeley, Illinois, United States (Lat/Long 41.8892, -87.9127) 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 Berkeley, 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 Berkeley, 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 Berkeley, 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 Berkeley, 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 Berkeley, Illinois, United States

Topography and Terrain

Berkeley sits in the far western suburbs of Chicago, positioned within the relatively flat terrain characteristic of the greater Chicago metropolitan area. The landscape around Berkeley consists primarily of gently rolling plains with minimal elevation changes, typical of the glacially-formed topography found throughout northern Illinois. The area lies within what geologists call the till plains region, where ancient glacial activity left behind a predominantly level landscape with occasional subtle undulations. The immediate vicinity around Berkeley features elevations that rarely vary more than a few dozen feet across considerable distances. This gentle topography extends in all directions from the community, creating an expansive area of relatively uniform, low-relief terrain. Small creeks and drainage channels cut shallow valleys through the landscape, but these features create only minor variations in the overall flat character of the region.

Optimal Areas for Large-Scale Solar Development

The topographical characteristics around Berkeley present favorable conditions for large-scale solar photovoltaic installations. The extensive flat to gently rolling terrain eliminates many of the challenges associated with solar development in more mountainous or heavily dissected landscapes. Areas to the west and southwest of Berkeley offer particularly promising conditions, where agricultural land dominates and the terrain remains consistently level across large parcels. The agricultural zones surrounding Berkeley provide ideal candidates for solar development due to their combination of suitable topography and land availability. These areas feature minimal shading from topographic features, consistent ground conditions, and parcels large enough to accommodate utility-scale solar arrays. The gentle slopes present in some areas actually benefit solar installations by providing natural drainage while maintaining optimal panel orientation possibilities. Industrial and commercial zones near major transportation corridors also present excellent opportunities for solar development. These areas typically feature large, relatively flat parcels with existing infrastructure access. The proximity to electrical transmission infrastructure in these developed corridors reduces connection costs and complexity for large-scale solar projects. The consistent, low-relief topography throughout the Berkeley region means that shadowing from terrain features poses minimal concern for solar installations. This topographical advantage extends across a wide area, making the entire region around Berkeley suitable for solar development from a terrain perspective, with site selection depending more on land use, zoning, and infrastructure considerations rather than topographical limitations.

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.