Fulton, Illinois presents a moderately favorable location for year-round solar energy generation, though with significant seasonal variations typical of the Northern Temperate Zone climate.

Seasonal Solar Performance

The solar energy output at this location shows dramatic seasonal swings. Summer provides the strongest performance at 6.38 kWh per day per kW of installed solar capacity, making it the prime season for solar generation. Spring follows as the second-best period with 5.15 kWh per day per kW, offering substantial energy production as daylight hours increase and weather improves. Autumn drops to 3.55 kWh per day per kW as the sun angle decreases and weather patterns shift. Winter presents the most challenging conditions with only 2.49 kWh per day per kW, representing less than 40% of summer production levels. For maximum year-round energy production from fixed solar panels at this Fulton location, the optimal tilt angle is 37 degrees facing south. This angle balances the seasonal variations to capture the most total annual solar energy.

Local Environmental Challenges

Several environmental and weather factors in Fulton, Illinois can significantly impact solar energy production: Snow accumulation during winter months poses the most serious challenge to solar output. Heavy snow can completely block panels for days or weeks, eliminating energy production entirely during periods when generation is already at its lowest. The region experiences frequent cloud cover and overcast conditions, particularly during autumn and winter months. These weather patterns reduce the direct sunlight reaching solar panels and contribute to the lower seasonal output figures. High humidity levels, especially during summer months, can create haze and atmospheric moisture that filters sunlight before it reaches the panels. Additionally, severe thunderstorms common to the Midwest can bring hail, high winds, and debris that may damage solar installations.

Preventative Installation Measures

Several installation strategies can help maximize solar energy production despite these local challenges:

• Install panels at steeper angles (closer to 45-50 degrees) to encourage snow shedding, though this may slightly reduce overall annual production
• Ensure adequate spacing between panel rows to prevent snow buildup and allow for safe cleaning access
• Use high-quality tempered glass and reinforced mounting systems rated for severe weather conditions including hail impact
• Install micro-inverters or power optimizers to minimize production losses when individual panels are partially shaded by snow or debris
• Position installations away from large trees that could drop branches during storms or create excessive shading

Regular maintenance becomes particularly important in this climate, including snow removal systems or manual clearing during winter months, and periodic cleaning to remove dust, pollen, and other debris that accumulate more readily in humid conditions.

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 Fulton, Illinois

Seasonal solar PV output for Latitude: 41.8672, Longitude: -90.1596 (Fulton, 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 37° South in Fulton, Illinois, United States

To maximize your solar PV system's energy output in Fulton, Illinois, United States (Lat/Long 41.8672, -90.1596) 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.

Seasonally adjusted solar panel tilt angles for Fulton, 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 Fulton, Illinois, 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

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 Fulton, 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 Fulton, 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 Fulton, Illinois, United States

Topography Around Fulton

The terrain surrounding Fulton in northwestern Illinois is characterized by gently rolling agricultural land that forms part of the broader Mississippi River valley system. The community sits on relatively flat to moderately undulating topography, with elevations that gradually transition from the river bluffs down toward the Mississippi River floodplain to the west. This area represents typical Midwest prairie landscape that has been extensively converted to farmland over the past century and a half. The immediate vicinity features a mix of cultivated fields, scattered woodlots, and small residential areas connected by rural roads. The land generally slopes westward toward the Mississippi River, creating natural drainage patterns that have shaped both agricultural practices and settlement patterns in the region. Small creeks and seasonal waterways cut modest valleys through the landscape, but these features are generally shallow and do not create significant topographical barriers.

Optimal Areas for Large-Scale Solar Development

The expansive agricultural fields south and east of Fulton present the most promising opportunities for large-scale solar photovoltaic installations. These areas offer several key advantages including relatively flat terrain that minimizes grading requirements, excellent accessibility via existing farm roads and county highways, and proximity to electrical infrastructure that already serves the rural community. The gently sloping farmland provides natural drainage while maintaining optimal orientation for solar panel placement. Much of this agricultural land consists of large, unobstructed parcels that could accommodate utility-scale solar arrays without significant topographical modifications. The absence of major hills, deep valleys, or extensive wetlands in these areas reduces both construction complexity and environmental permitting challenges. Areas immediately adjacent to existing electrical transmission lines would be particularly well-suited for solar development, as they offer direct grid connection opportunities. The rural road network in the region provides adequate access for construction equipment and ongoing maintenance operations, while the generally stable soil conditions typical of former prairie land offer good foundation support for solar mounting systems. The open agricultural landscape also minimizes shading concerns from trees or buildings, allowing for efficient solar panel spacing and maximum energy capture throughout the day. Local zoning patterns and land use practices in this agricultural region are often more accommodating to renewable energy projects compared to more densely developed areas.

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.