Marshall, Illinois, located in the Northern Temperate Zone, presents a moderately favorable location for year-round solar photovoltaic energy generation, though with significant seasonal variations that potential solar installers should carefully consider.

Seasonal Solar Production Patterns

The solar energy output at Marshall shows typical temperate zone characteristics, with summer months delivering the highest production at 6.35 kWh per day per kW of installed capacity. Spring follows as the second-best season with 5.40 kWh per day per kW, making these warmer months ideal for solar generation at this location. Autumn production drops to 3.68 kWh per day per kW, while winter presents the most challenging period with only 2.18 kWh per day per kW. This represents a nearly three-fold difference between peak summer and winter production, which is typical for locations at this latitude.

Optimal Panel Configuration

For fixed panel installations at Marshall, the ideal tilt angle is 34 degrees facing south to maximize total year-round solar production. This angle has been calculated to optimize energy capture across all seasons by accounting for the sun's varying elevation throughout the year and weighting these angles based on solar irradiance data.

Local Environmental and Weather Factors

Several factors specific to Marshall's location and climate could potentially impact solar production:

• Midwest Weather Patterns: The region experiences frequent cloud cover, particularly during winter months, which can reduce solar irradiance and contribute to the lower winter production figures
• Snow Accumulation: Winter snowfall can cover panels and significantly reduce or eliminate production until the snow melts or is removed
• Agricultural Dust: Being in an agricultural region, airborne dust and pollen during farming seasons can accumulate on panels and reduce efficiency
• Severe Weather: Illinois experiences thunderstorms, high winds, and occasional hail that could damage solar installations

Preventative Measures for Optimal Performance

To maximize solar energy production despite these challenges, several installation strategies can be employed:

• Proper Mounting: Install panels at the optimal 34-degree tilt to encourage snow to slide off naturally and improve drainage
• Quality Equipment: Use panels and mounting systems rated for high wind loads and hail impact common to the Midwest
• Regular Maintenance: Schedule periodic cleaning to remove agricultural dust and debris, particularly during spring and summer months
• Strategic Placement: Position installations away from dust sources where possible and ensure adequate clearance for maintenance access

Overall, while Marshall, Illinois faces seasonal production challenges typical of temperate climates, proper installation techniques and regular maintenance can help ensure reliable solar energy generation throughout the year, with peak performance during the spring and summer months.

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 Marshall, Illinois

Seasonal solar PV output for Latitude: 39.4241, Longitude: -87.6871 (Marshall, 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 34° South in Marshall, Illinois, United States

To maximize your solar PV system's energy output in Marshall, Illinois, United States (Lat/Long 39.4241, -87.6871) throughout the year, you should tilt your panels at an angle of 34° 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 Marshall, 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 Marshall, Illinois, United States. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 34° South tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
23° South in Summer	43° South in Autumn	54° South in Winter	32° 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 Marshall, 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 Marshall, 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 Marshall, Illinois, United States

Topography Around Marshall, United States

The terrain surrounding Marshall in west-central Indiana is characterized by gently rolling agricultural plains that are typical of the Midwest region. This area sits within the fertile Wabash River valley system, where the landscape has been shaped by centuries of glacial activity and river erosion. The topography consists primarily of low hills and broad valleys with relatively modest elevation changes, creating a predominantly flat to gently undulating countryside. The region features expansive farmland interspersed with small woodlots and creek bottoms. Most of the land has been cleared for agricultural purposes over the past two centuries, resulting in open fields that stretch for miles with only occasional tree lines marking property boundaries or following waterways. The soil composition is largely glacial till and alluvial deposits, which provide excellent drainage characteristics in most areas. Elevation changes throughout the Marshall vicinity are generally gradual, with the highest points being low ridges that rise perhaps 100 to 200 feet above the valley floors. These ridges typically run in north-south orientations, following the ancient glacial patterns that shaped this part of Indiana. Between these gentle ridges lie broad, flat valley floors where much of the current agricultural activity takes place.

Optimal Areas for Large-Scale Solar Development

The flat to gently rolling agricultural fields south and east of Marshall present the most promising opportunities for large-scale solar photovoltaic installations. These areas offer several key advantages including minimal grading requirements, excellent accessibility via existing farm roads, and proximity to rural electrical infrastructure. The open farmland provides unobstructed southern exposure across vast acreages without the need for extensive tree clearing or terrain modification. The elevated ridge areas, while requiring more careful site planning due to their undulating nature, could also accommodate solar arrays effectively. These locations often provide natural drainage advantages and may offer slightly better air circulation, which can benefit panel performance. The gentle slopes on these ridges are typically well within acceptable ranges for solar installation without requiring significant earthwork. Areas immediately adjacent to existing electrical transmission corridors would be particularly well-suited for development, as they minimize the infrastructure investment needed to connect large solar facilities to the grid. The rural road network throughout the region provides adequate access for construction and maintenance vehicles, though some improvements to farm roads might be necessary for the largest installations. The broad valley floors, while exceptionally flat and easy to develop, would require careful attention to drainage considerations during wet periods. However, these areas often represent the largest contiguous parcels of available land, making them attractive for utility-scale projects that require substantial acreage. The agricultural nature of much of this land means that large, unobstructed parcels are commonly available without the complications of residential or commercial development.

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.