Kewanee, Illinois, located in the Northern Temperate Zone at latitude 41.2406 and longitude -89.9325, offers a moderately favorable location for solar PV energy generation with significant seasonal variations throughout the year.

Seasonal Solar Production

Solar energy production in Kewanee follows a predictable seasonal pattern. Summer stands out as the most productive season, generating approximately 6.33kWh per day for each kilowatt of installed capacity. Spring follows as the second most productive season with 5.24kWh/day. Production drops considerably in autumn to 3.47kWh/day, while winter represents the lowest output period with only 2.50kWh/day per kilowatt installed.

This means a typical 10kW residential system would produce about 63.3kWh on an average summer day but only 25kWh on a winter day - a significant difference that highlights the seasonal variability at this location.

Optimal Installation Setup

For fixed panel installations in Kewanee, the ideal tilt angle to maximize year-round production is 36 degrees facing south. This angle represents the mathematically optimal position based on Kewanee's latitude and seasonal sun paths, accounting for Earth's elliptical orbit and weighted by daily PV potential.

Environmental and Weather Considerations

Several environmental factors may impact solar production in Kewanee:

• Winter snow accumulation can significantly reduce output by covering panels, requiring regular clearing or steeper installation angles to promote natural snow shedding
• Cloudy conditions, particularly common during winter months in the Midwest, contribute to the reduced winter production figures
• Occasional severe weather including thunderstorms and potential tornadic activity may pose risks to installations

To mitigate these challenges, installations in Kewanee should incorporate durable mounting systems rated for local wind conditions, accessible panel placement to facilitate snow removal, and quality inverters that perform efficiently even in partial shading conditions. Additionally, regular maintenance to remove debris and ensure optimal panel cleanliness will help maximize energy capture throughout the year.

Despite these seasonal challenges, Kewanee's location still offers sufficient solar resources to make photovoltaic systems viable, particularly from April through September when production levels are substantially higher.

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 Kewanee

Seasonal solar PV output for Latitude: 41.2406, Longitude: -89.9325 (Kewanee, 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 Kewanee, United States

To maximize your solar PV system's energy output in Kewanee, United States (Lat/Long 41.2406, -89.9325) 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 Kewanee, 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 Kewanee, 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
25° South in Summer	45° South in Autumn	55° South in Winter	34° 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 Kewanee, 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 Kewanee, 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 Kewanee, United States

Kewanee, Illinois is situated in a region characterized by gently rolling plains typical of the Midwestern United States. Located in Henry County at approximately 41.2406° North latitude and -89.9325° West longitude, the area exhibits relatively modest topographical variation. The landscape around Kewanee consists primarily of slightly undulating terrain with elevations generally ranging between 750 and 850 feet above sea level. The topography was largely shaped by glacial activity during the Pleistocene epoch, resulting in the predominantly flat to gently rolling landscape seen today. Small streams and drainage ways create subtle valleys throughout the area, but there are no dramatic hills or deep ravines. This region is part of the larger Till Plains section of the Central Lowland physiographic province, featuring rich soils deposited by ancient glaciers.

Agricultural Dominance

The land surrounding Kewanee is predominantly agricultural, with extensive farmland stretching in all directions. The relatively flat terrain has made this area ideal for farming operations, particularly corn and soybean production. The agricultural character of the region means large, open parcels of land are common, with fields separated by rural roads typically arranged in a grid pattern consistent with the Public Land Survey System.

Solar PV Potential

For large-scale solar photovoltaic (PV) development, several areas near Kewanee offer promising conditions. The most suitable locations would be: The flat agricultural lands to the south and southwest of Kewanee present excellent opportunities for solar development. These areas feature minimal topographical variation, which reduces grading costs during construction. The land is already cleared for agriculture, eliminating the need for extensive site preparation. Additionally, these locations generally have good drainage characteristics, which is important for maintaining solar infrastructure. Areas to the east of Kewanee, extending toward Neponset and Sheffield, also present favorable conditions for solar PV installations. These locations feature similar flat terrain with adequate drainage and large contiguous parcels that could accommodate utility-scale developments.

Topographical Considerations for Solar Development

When evaluating specific sites for solar PV around Kewanee, several topographical factors should be considered. South-facing gentle slopes, where available, would provide optimal solar exposure throughout the year. While the region is generally flat, even subtle variations in elevation can affect energy production efficiency. Areas with good drainage are preferable to prevent flooding and water damage to solar equipment. The subtle variations in the landscape can influence drainage patterns, making some locations more suitable than others despite the overall flat character of the region. It's worth noting that the relatively flat topography throughout the region means that most areas within a 15-mile radius of Kewanee could technically support solar development from a purely topographical perspective. Other factors such as proximity to transmission infrastructure, current land use, soil quality, and local zoning regulations would likely play more decisive roles in determining the most appropriate sites for large-scale solar PV installations in this 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.