Flag of United States

Flag of United StatesSolar PV Analysis of Round Lake, United States

Graph of hourly avg kWh electricity output per kW of Solar PV installed in Round Lake, United States (by season)

Solar Energy Potential in Round Lake, Illinois

Round Lake, Illinois, located in the Northern Temperate Zone, offers varying potential for solar energy generation throughout the year. The location's latitude and longitude (42.3667, -88.0925) play a significant role in determining its solar energy production capabilities.

Seasonal Solar Output

Solar energy production in Round Lake fluctuates significantly across the seasons. Summer stands out as the most productive period, with an average daily output of 6.27 kWh per kW of installed solar capacity. Spring follows closely, generating 5.28 kWh/day. Autumn sees a considerable drop to 3.28 kWh/day, while winter experiences the lowest output at 2.23 kWh/day.

Optimal Times for Solar Generation

The most ideal time for solar energy production in Round Lake is from late spring through early fall. During these months, longer daylight hours and higher sun angles contribute to increased solar panel efficiency. Summer solstice, typically around June 21st, marks the peak of solar potential in this region.

Panel Tilt Angle for Maximum Efficiency

For fixed panel installations in Round Lake, the optimal tilt angle to maximize year-round solar production is 37 degrees facing south. This angle takes into account the location's latitude and seasonal variations in sun position, ensuring the best overall performance throughout the year.

Environmental and Weather Factors

Several factors can impact solar energy production in Round Lake: 1. Snow accumulation: Winter snowfall can temporarily reduce panel efficiency if not promptly removed. 2. Cloud cover: The region experiences significant cloud cover, particularly in winter months, which can reduce solar output. 3. Temperature extremes: Very high summer temperatures can slightly decrease panel efficiency, while very low winter temperatures can affect overall system performance.

Preventative Measures

To mitigate these challenges and optimize solar energy production, consider the following measures: 1. Install panels at the recommended 37-degree tilt to facilitate natural snow sliding and maximize year-round production. 2. Use high-efficiency panels that perform well in low-light conditions to counteract cloud cover effects. 3. Implement a regular panel cleaning schedule, especially after snowfall events. 4. Consider a ground-mounted system for easier maintenance and snow removal. 5. Use microinverters or power optimizers to minimize the impact of partial shading on overall system performance. While Round Lake's location presents some challenges for year-round solar energy production, proper system design and maintenance can still yield significant energy output, particularly during the more favorable months of late spring through early fall.

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 Round Lake

Seasonal solar PV output for Latitude: 42.3667, Longitude: -88.0925 (Round Lake, 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:

Summer
Average 6.27kWh/day in Summer.
Autumn
Average 3.28kWh/day in Autumn.
Winter
Average 2.23kWh/day in Winter.
Spring
Average 5.28kWh/day in Spring.

 

Ideally tilt fixed solar panels 37° South in Round Lake, United States

To maximize your solar PV system's energy output in Round Lake, United States (Lat/Long 42.3667, -88.0925) throughout the year, you should tilt your panels at an angle of 37° 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.

The sun
At Latitude: 42.3667, Longitude: -88.0925, the ideal angle to tilt panels is 37° South

Seasonally adjusted solar panel tilt angles for Round Lake, 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 Round Lake, United States. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 37° 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 46° South in Autumn 56° South in Winter 35° South in Spring

Assuming you can modify the tilt angle of your solar PV panels throughout the year, you can optimize your solar generation in Round Lake, United States as follows: In Summer, set the angle of your panels to 26° facing South. In Autumn, tilt panels to 46° facing South for maximum generation. During Winter, adjust your solar panels to a 56° angle towards the South for optimal energy production. Lastly, in Spring, position your panels at a 35° angle facing South to capture the most solar energy in Round Lake, United States.

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 Round Lake, 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 Round Lake, 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.






Please enter information above to calculate panel spacing.

Topography for solar PV around Round Lake, United States

The topography around Round Lake, located in northeastern Illinois, United States, is characterized by gently rolling terrain typical of the Midwest region. This area was shaped by glacial activity during the last ice age, resulting in a landscape of subtle hills, shallow depressions, and numerous small lakes and wetlands. The immediate vicinity of Round Lake features relatively flat to mildly undulating land, with elevations generally ranging between 700 and 800 feet above sea level. The lake itself sits in a shallow basin, surrounded by low-lying areas that gradually rise to form gentle slopes and modest hills. The terrain is interspersed with scattered woodlands, open fields, and residential developments. To the west and northwest of Round Lake, the land becomes slightly more varied, with some areas of more pronounced hills and valleys. These features are part of the larger Moraine region, which extends across much of northern Illinois and southern Wisconsin. Despite these variations, the overall topography remains relatively gentle and accessible.

Potential for Large-Scale Solar PV

When considering areas nearby that would be most suited to large-scale solar PV installations, several factors come into play. Ideal locations for solar farms typically require flat or gently sloping land, good sun exposure, and proximity to existing infrastructure. The areas to the south and southeast of Round Lake show promise for solar development. These regions feature expansive, open spaces with minimal topographical variation, providing ample room for large solar arrays. The relatively flat terrain in this direction would minimize the need for extensive land grading, reducing installation costs and environmental impact. Additionally, the agricultural lands to the west and southwest of Round Lake could be suitable for solar PV projects. These areas often have large, unobstructed fields that receive consistent sunlight throughout the day. The existing road network in these rural areas could facilitate the transportation of equipment and materials during construction and maintenance. It's important to note that while the topography around Round Lake is generally favorable for solar development, other factors such as local zoning regulations, environmental considerations, and grid connection capabilities would need to be carefully evaluated before proceeding with any large-scale solar PV projects in the 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!

Citation Guide

Article Details for Citation

Article: Solar PV Analysis of Round Lake, United States
Author: Aaron Robinson
Publisher: profileSOLAR.com
First Published: Tuesday 14th of January 2025
Last Updated: Monday 21st of July 2025

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?

"Just like the sun juicing up solar PV panels, coffee is our liquid sunshine that fuels our research and development shenanigans!" 😊
Buy me a coffee - Thanks for your support!

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.

Worldwide Solar PV Analysis of 20,000 Locations

Helping you assess viability of solar PV for your site

profileSOLAR on YouTube

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.

Calculate Your Optimal Solar Panel Tilt Angle