Solar Energy Potential in Downs, Illinois

Downs, Illinois, located in the Northern Temperate Zone, offers varying potential for solar PV energy generation throughout the year. The seasonal electricity output shows significant fluctuations that are typical for this latitude. The solar production in Downs follows a predictable seasonal pattern. Summer stands out as the most productive season, generating approximately 6.30kWh per day for each kilowatt of installed solar capacity. Spring follows as the second most productive season with 5.32kWh/day. Production decreases considerably in Autumn to 3.50kWh/day, while Winter represents the lowest output period with only 2.27kWh/day per kilowatt installed. For residents considering solar installation in Downs, this means that approximately 64% of annual energy production occurs during Spring and Summer months. The substantial difference between Summer and Winter production (nearly a threefold decrease) highlights the seasonal nature of solar generation in this region.

Optimal Panel Installation

For a fixed panel installation at this location, the ideal angle to tilt panels to maximize total year-round production from solar PV is 35 degrees facing South. This specific angle has been calculated to optimize annual energy capture based on Downs' geographical position and seasonal sun paths.

Environmental and Weather Considerations

Several environmental factors in Downs may impact solar production:

• Snow accumulation during winter months can temporarily reduce output if panels become covered, though the tilted installation at 35 degrees helps with natural snow shedding.
• The region experiences occasional severe weather including thunderstorms and tornadoes that could potentially damage installations if not properly secured.
• Seasonal tree pollen and agricultural dust can create a thin film on panels, gradually reducing efficiency if not cleaned periodically.

To mitigate these challenges, solar installations in Downs should include robust mounting systems rated for local wind conditions, accessible panel placement for snow removal when necessary, and a regular cleaning schedule, particularly after pollen season in Spring and harvesting activities in Fall. Additionally, microinverter or power optimizer technology can help minimize production losses when partial shading occurs. Despite these considerations, Downs' location provides sufficient solar resources to make PV installations viable, especially when designed with these local factors in mind.

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 Downs

Seasonal solar PV output for Latitude: 40.3993, Longitude: -88.8706 (Downs, 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 35° South in Downs, United States

To maximize your solar PV system's energy output in Downs, United States (Lat/Long 40.3993, -88.8706) throughout the year, you should tilt your panels at an angle of 35° 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 Downs, 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 Downs, United States. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 35° South tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
24° South in Summer	44° South in Autumn	54° South in Winter	33° 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 Downs, 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 Downs, 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 Downs, United States

The topography around Downs, Illinois, located in McLean County in the central part of the state, is characterized by gently rolling terrain typical of the Central Plains region. Situated within the vast Illinois prairie, the landscape features subtle elevation changes rather than dramatic relief. The area sits at approximately 770 feet (235 meters) above sea level, with minimal variation in elevation across the surrounding region. This part of Illinois was shaped primarily by glacial activity during the Pleistocene epoch, resulting in a relatively flat to moderately undulating landscape. The retreat of glaciers left behind fertile soils and a subtle topography of low moraines, shallow valleys, and occasional glacial till deposits. The Mackinaw River watershed influences parts of the surrounding area, creating gentle slopes toward drainage systems.

Solar PV Potential in the Downs Area

The topographical characteristics of the Downs region offer several advantages for large-scale solar photovoltaic (PV) development. The generally flat to gently sloping terrain minimizes the need for extensive grading and site preparation, which can significantly reduce construction costs for solar installations. The areas most suited for large-scale solar PV development around Downs would be the open agricultural lands that dominate the landscape. These locations typically have: 1. Minimal shading obstructions from natural features or tall structures 2. Good accessibility via the existing road network 3. Relatively flat terrain that reduces installation complexity 4. Limited flooding risk compared to lowland areas Particularly promising are the slightly elevated areas to the north and east of Downs, where the terrain provides subtle south-facing slopes ideal for maximizing solar collection efficiency. These areas also tend to have well-drained soils, reducing potential issues with seasonal flooding or poor ground stability. The agricultural lands surrounding Interstate 74, which passes near Downs, represent especially suitable locations for solar development due to their combination of favorable topography and existing infrastructure access. The flat farmlands extending toward Bloomington-Normal to the northwest also present excellent opportunities for large-scale installations. One topographical consideration for solar development in this region is the need for proper drainage systems, as the relatively flat terrain can sometimes lead to standing water during heavy precipitation events. However, this challenge is manageable through standard engineering practices and is offset by the overall favorable conditions presented by the gently rolling landscape.

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.