Salem, Ohio, located in the Northern Temperate Zone at coordinates 40.8968, -80.8615, 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 Performance

The location shows strong solar production during warmer months, with summer generating 6.09 kWh per day per kW of installed solar capacity. Spring follows as the second-best season at 5.32 kWh per day per kW, making these the ideal times for solar energy generation at this location. Autumn production drops to 3.39 kWh per day per kW, while winter presents the most challenging period with only 1.80 kWh per day per kW of production. This seasonal pattern means that solar installations in Salem will generate approximately three times more electricity in summer compared to winter months. The spring and summer seasons combined represent the peak solar production period, accounting for the majority of annual energy generation.

Optimal Panel Configuration

For maximum year-round solar output at this Salem location, fixed solar panels should be tilted at 35 degrees facing south. This angle has been calculated to optimize total annual production by accounting for the sun's changing position throughout the year and weighting the angles based on actual solar irradiance data and daily photovoltaic potential.

Local Environmental and Weather Challenges

Several environmental and weather factors in Salem, Ohio can significantly impact solar energy production:

• Snow accumulation: Winter weather frequently brings snow that can completely block solar panels, eliminating production until cleared
• Cloud cover and precipitation: The region experiences considerable cloudy weather throughout the year, particularly during autumn and winter months
• Industrial air pollution: Salem's location in an industrial region of Ohio means airborne particles and pollutants can accumulate on panels, reducing efficiency
• High humidity and fog: Moisture in the air can create haze that reduces solar irradiance reaching the panels

Preventative Measures for Enhanced Production

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

• Steeper tilt angles: Installing panels at angles steeper than the optimal 35 degrees can help snow slide off more easily, though this may slightly reduce overall annual production
• Easy access design: Positioning panels where they can be safely accessed for snow removal and cleaning
• Quality mounting systems: Using robust mounting hardware that can handle snow loads and ice formation
• Regular maintenance schedule: Implementing quarterly cleaning to remove accumulated dust, pollen, and industrial pollutants
• Microinverters or power optimizers: These technologies can minimize the impact when individual panels are partially shaded or dirty

Despite these challenges, Salem's strong summer and spring solar production makes it a viable location for solar installations, particularly when proper preventative measures are incorporated into the system design and maintenance planning.

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 Salem, Ohio

Seasonal solar PV output for Latitude: 40.8968, Longitude: -80.8615 (Salem, Ohio, 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 35° South in Salem, Ohio, United States

To maximize your solar PV system's energy output in Salem, Ohio, United States (Lat/Long 40.8968, -80.8615) throughout the year, you should tilt your panels at an angle of 35° 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 Salem, Ohio, 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 Salem, Ohio, United States. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 35° 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	56° 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 Salem, Ohio, 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 Salem, Ohio, 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 Salem, Ohio, United States

Topographical Features of Salem

Salem sits in the rolling hills of eastern Ohio, positioned within the Appalachian Plateau region. The landscape around this area is characterized by gently undulating terrain with moderate elevation changes, creating a mix of ridges, valleys, and relatively flat plateaus. The elevation in and around Salem typically ranges from about 900 to 1,200 feet above sea level, with the town itself nestled in a valley surrounded by higher ground. The topography consists primarily of sedimentary rock formations that have been carved by centuries of water erosion, resulting in a landscape of rounded hills separated by stream valleys. These hills are generally not steep or dramatic, but rather present as gentle slopes that roll across the countryside. The area features numerous small creeks and tributaries that flow through the valleys, contributing to the varied elevation patterns throughout the region.

Drainage Patterns and Land Use

The region's drainage system is dominated by small waterways that eventually feed into larger river systems. These watercourses have created natural corridors through the landscape, often following the lowest elevation points between hills. The surrounding countryside is primarily agricultural, with a mix of crop fields, pastureland, and scattered woodlots covering the hillsides and valley floors. Much of the land around Salem consists of cleared farmland that has been in agricultural use for generations. This agricultural heritage has resulted in large, relatively open spaces with minimal tree cover in many areas. The combination of cleared land and gentle topography creates numerous potential sites for development projects requiring substantial flat or gently sloping terrain.

Optimal Areas for Large-Scale Solar Development

The most suitable locations for large-scale solar photovoltaic installations around Salem would be found on the broader ridgetops and gently sloping hillsides that face south or southwest. These elevated areas typically offer the best combination of minimal shading from surrounding terrain and optimal solar exposure throughout the day. The agricultural fields on these higher elevations would be particularly well-suited, as they are already cleared of trees and have relatively consistent grades. The plateau areas to the north and east of Salem present especially promising opportunities, where the topography levels out into expanses of farmland with gentle slopes of less than ten percent grade. These areas would require minimal site preparation and grading work, making them economically attractive for solar development. The existing agricultural infrastructure, including access roads and electrical connections to support farming operations, would also benefit solar installation projects. Valley floors, while often flat, may be less ideal due to potential shading from surrounding hills during certain parts of the day, particularly in winter months when the sun angle is lower. However, some of the broader valleys with good southern exposure could still accommodate solar installations, especially those oriented east-west rather than north-south, which would minimize shading issues from adjacent ridgelines.

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.