Red Wing, Minnesota, 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 Production Performance

The solar energy output at this Minnesota location shows dramatic seasonal swings. Summer delivers the strongest performance at 6.67 kWh per day per installed kilowatt, making it an excellent time for solar generation. Spring follows as the second-best season with 5.13 kWh daily output per kilowatt, providing solid energy production during the transition months. However, the colder months present more challenging conditions. Autumn drops to 3.32 kWh per day per kilowatt, while winter plummets to just 2.30 kWh daily per kilowatt installed. This winter figure represents only about one-third of summer production levels, creating a significant seasonal energy gap that homeowners and businesses must plan for.

Optimal Panel Installation

For maximum year-round energy production at Red Wing, fixed solar panels should be tilted at 38 degrees facing south. This angle has been calculated to optimize total annual output by accounting for the sun's changing position throughout the year and the Earth's elliptical orbit around the sun.

Local Environmental and Weather Challenges

Several significant factors in Red Wing can impede solar energy production and require preventative measures during installation:

• Heavy snow accumulation: Minnesota winters bring substantial snowfall that can completely cover solar panels, blocking energy production for days or weeks
• Ice formation: Freezing rain and ice storms can create thick ice layers on panels, reducing efficiency and potentially causing damage
• Extreme temperature fluctuations: The region experiences severe temperature swings from hot summers to frigid winters, which can stress panel materials and connections
• High humidity and precipitation: The area's climate includes significant rainfall and humidity that can affect electrical components over time

Preventative Installation Measures

To maximize solar production despite these challenges, several installation strategies prove essential. Panels should be mounted with adequate spacing from the roof surface to allow air circulation, which helps with snow shedding and prevents ice dam formation. The 38-degree tilt angle actually helps with this, as steeper angles allow snow to slide off more easily than flatter installations. Installing panels with robust mounting systems designed for high snow loads prevents structural damage during heavy winter storms. Additionally, using panels and inverters rated for extreme temperature ranges ensures continued operation during Minnesota's harsh winters and hot summers. Proper electrical conduit protection and weatherproofing become critical in this climate. All electrical connections should be sealed against moisture infiltration, and conduits should be installed to prevent water accumulation and freezing damage. Regular maintenance access should be planned during installation, as periodic snow removal may be necessary during extended winter periods to restore energy production. However, this should only be done safely and may require professional service in many cases.

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 Red Wing

Seasonal solar PV output for Latitude: 44.5548, Longitude: -92.5467 (Red Wing, 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 38° South in Red Wing, United States

To maximize your solar PV system's energy output in Red Wing, United States (Lat/Long 44.5548, -92.5467) throughout the year, you should tilt your panels at an angle of 38° 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 Red Wing, 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 Red Wing, United States. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 38° South tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
28° South in Summer	48° South in Autumn	58° South in Winter	37° 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 Red Wing, 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 Red Wing, 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 Red Wing, United States

Topography Around Red Wing, Minnesota

Red Wing sits in a dramatically varied landscape along the Mississippi River in southeastern Minnesota, where the river valley creates a striking contrast between flat bottomlands and steep bluffs. The city itself is nestled between the mighty Mississippi River to the southeast and a series of towering limestone and sandstone bluffs that rise abruptly from the river valley floor. These bluffs, part of the greater Mississippi River valley system, can reach heights of 400 to 500 feet above the river level, creating a bowl-like setting for the community.

The immediate area around Red Wing features the characteristic topography of the Driftless Area, a region that escaped glacial flattening during the last ice age. This means the landscape retains its pre-glacial character with deep valleys, steep-sided hills, and dramatic elevation changes over short distances. The Mississippi River floodplain provides relatively flat terrain immediately adjacent to the water, but this quickly gives way to steep slopes and rugged bluff country as one moves inland.

To the northwest and southwest of Red Wing, the terrain gradually transitions from the steep river bluffs to rolling agricultural land typical of southeastern Minnesota. This area features gentler slopes, broader valleys, and more extensive flat or gently rolling farmland. The elevation changes become less dramatic as the distance from the Mississippi River increases, creating expansive areas of productive agricultural land.

Optimal Areas for Large-Scale Solar Development

The most suitable locations for large-scale solar photovoltaic installations around Red Wing would be found in the agricultural areas northwest and southwest of the city, where the terrain levels out into the broader Minnesota landscape. These areas offer the gentle slopes and extensive flat fields that are ideal for solar array placement and maintenance access. The rolling farmland in these directions provides ample space for large installations while avoiding the challenging topography of the immediate river valley.

The flat to gently rolling agricultural land extending west and northwest from Red Wing presents the best combination of favorable terrain, accessibility, and available space. This region offers the gradual slopes that can actually benefit solar installations by providing natural drainage and optimal panel positioning, while still being gentle enough for efficient construction and maintenance operations.

Areas immediately adjacent to the Mississippi River and on the steep bluffs would be poorly suited for large-scale solar development due to their dramatic elevation changes, challenging access for construction equipment, and limited flat space for array placement. The river bottomlands, while flat, may present issues with flooding and wetland restrictions that could complicate large-scale development.

The transition zone between the steep bluff country and the flatter agricultural areas offers some potential, particularly on south-facing slopes that are not too steep. However, the most practical and economically viable locations remain in the more level agricultural areas that extend away from the dramatic river valley topography that defines Red Wing's immediate setting.

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!

Citation Guide

Article Details for Citation

Tell Us About Your Work

We love seeing how our research helps others! If you've cited this article in your work, we'd be delighted to hear about it. Drop us a line via our Contact Us page or on X, to share where you've used our information - we may feature a link to your work on our site. This helps create a network of valuable resources for others in the solar energy community and helps us understand how our research is contributing to the field. Plus, we occasionally highlight exceptional works that reference our research on our social media channels.

Feeling generous?

Share this with your friends!

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.