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

Seasonal Solar Performance

The solar energy output at this location shows dramatic seasonal swings. Summer delivers the strongest performance at 6.20 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 5.47 kWh per day per kW, offering nearly comparable production levels. Autumn marks a notable decline in solar output, dropping to 3.68 kWh per day per kW. Winter presents the most challenging conditions, with production falling to just 2.16 kWh per day per kW - less than half of spring output and roughly one-third of summer production. For optimal year-round energy capture at this location, solar panels should be installed at a fixed angle of 34 degrees tilted toward the south. This angle maximizes total annual production by accounting for the sun's varying position throughout the year and the seasonal differences in solar irradiance.

Local Environmental and Weather Challenges

Several environmental and weather factors in Danville, Indiana can significantly impact solar energy production:

• Snow accumulation during winter months can completely block solar panels
• Ice storms common in the region can damage panels or create persistent ice coverage
• Frequent cloud cover and overcast conditions, particularly during autumn and winter
• High humidity levels that can reduce solar efficiency
• Severe thunderstorms with potential hail damage

Preventative Installation Measures

To maximize solar energy production despite these challenges, several installation strategies prove beneficial: The recommended 34-degree tilt angle not only optimizes sun exposure but also helps snow slide off panels more easily. Installing panels with adequate spacing between rows prevents snow buildup and shadowing issues while allowing better air circulation to reduce humidity effects. Choosing high-quality panels with strong tempered glass can withstand hail impacts common during Indiana's storm season. Anti-reflective coatings help maintain efficiency during high-humidity conditions, while proper grounding and surge protection systems protect against lightning damage from frequent thunderstorms. Regular maintenance scheduling becomes crucial, particularly before and after winter months, to clear debris and inspect for weather-related damage. Installing monitoring systems helps identify production drops quickly, allowing for prompt cleaning or repairs when weather impacts occur.

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 Danville, Indiana

Seasonal solar PV output for Latitude: 39.7628, Longitude: -86.5343 (Danville, Indiana, 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 Danville, Indiana, United States

To maximize your solar PV system's energy output in Danville, Indiana, United States (Lat/Long 39.7628, -86.5343) 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 Danville, Indiana, 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 Danville, Indiana, 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
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 Danville, Indiana, 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 Danville, Indiana, 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 Danville, Indiana, United States

Topography Around Danville, Indiana

Danville sits in the heart of central Indiana, positioned within the gently rolling terrain characteristic of the Midwest agricultural region. The landscape surrounding this Hendricks County community consists primarily of flat to gently undulating farmland, with elevation changes that are typically modest and gradual. The area lies within what geologists call the till plains region, formed by ancient glacial activity that left behind fertile soils and relatively level topography.

The terrain around Danville features broad, open agricultural fields interspersed with small woodlots and residential developments. Most of the surrounding countryside maintains elevations between 800 and 900 feet above sea level, with gentle slopes that rarely exceed a few degrees. This glacially-sculpted landscape is drained by several small creeks and streams, including portions of the White Lick Creek watershed, which create subtle valleys and drainage patterns throughout the region.

The local topography is dominated by expansive corn and soybean fields that stretch across the horizon, broken occasionally by farmsteads, tree lines, and rural roads. These agricultural areas typically feature excellent soil drainage and minimal topographic obstacles, making the region highly suitable for various land uses beyond farming.

Optimal Areas for Large-Scale Solar Development

The flat to gently rolling agricultural land surrounding Danville presents excellent opportunities for large-scale solar photovoltaic installations. The most suitable areas would be the extensive farmland located to the north, east, and south of the community, where large tracts of relatively level ground are readily available. These agricultural areas offer the dual advantages of minimal grading requirements and existing infrastructure access through rural road networks.

Particularly promising locations include the broad agricultural valleys and upland areas where slopes are minimal and southern exposure can be maximized. The gentle topography means that solar arrays can be installed with minimal earth moving, reducing development costs while maintaining optimal panel orientation. Areas with slight south-facing slopes would be especially beneficial, as they naturally enhance solar collection efficiency throughout the day.

The region's agricultural character also means that large contiguous parcels are potentially available for solar development, allowing for economies of scale that make utility-scale installations more economically viable. The relatively sparse tree cover across much of the agricultural landscape minimizes shading concerns, while the flat terrain reduces the complexity of electrical infrastructure installation and maintenance access.

Areas to avoid for solar development would include the more heavily wooded zones, particularly along creek corridors and in established residential neighborhoods. The small valleys carved by local waterways, while not dramatically deep, may present drainage challenges and are often associated with more mature vegetation that would require clearing.

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.