Alma, Arkansas, 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 6.86 kWh per day per kW of installed capacity, making it the prime season for solar generation. Spring follows as the second-best period with 5.22 kWh per day per kW, offering solid energy production as daylight hours increase and weather conditions improve. Autumn sees a notable decline to 4.49 kWh per day per kW as the sun angle decreases and weather patterns shift. Winter presents the most challenging conditions, dropping to just 2.64 kWh per day per kW - less than 40% of summer production levels.

Optimal Installation Setup

For maximum year-round energy production at this Alma location, solar panels should be installed at a fixed tilt angle of 31 degrees facing south. This specific 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 Challenges

Arkansas's climate and geography present several factors that can impact solar energy production in the Alma area. The region experiences frequent severe weather events that pose significant challenges to solar installations.

• Hailstorms are common during spring and early summer, potentially damaging solar panels
• High winds from thunderstorms and occasional tornadoes can stress mounting systems
• Ice storms during winter months can add dangerous weight loads to panels
• Heavy rainfall and humidity can affect electrical connections over time
• Dust and pollen accumulation, particularly during spring, can reduce panel efficiency

Protective Measures for Better Performance

Several preventative strategies can help maximize solar energy production despite these environmental challenges. Installing impact-resistant tempered glass panels provides crucial protection against hail damage, while robust mounting systems engineered for high wind loads ensure panels remain secure during storms. Regular cleaning schedules become essential, particularly during pollen season and after dust storms. Proper electrical enclosures and weatherproofing protect sensitive components from moisture damage. Additionally, installing panels with adequate spacing allows for thermal expansion and better airflow, which helps maintain efficiency during hot, humid summer months. Choosing quality inverters with good warranty coverage and surge protection helps ensure long-term reliability in an area prone to electrical storms. Professional installation that meets or exceeds local building codes for wind and weather resistance is particularly important in this region. While Alma's location offers decent solar potential, especially during the warmer months, the significant winter production drop and weather-related challenges mean careful system design and quality components are essential for achieving optimal long-term performance.

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 Alma

Seasonal solar PV output for Latitude: 35.4779, Longitude: -94.2219 (Alma, 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 31° South in Alma, United States

To maximize your solar PV system's energy output in Alma, United States (Lat/Long 35.4779, -94.2219) throughout the year, you should tilt your panels at an angle of 31° 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 Alma, 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 Alma, United States. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 31° South tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
19° South in Summer	40° South in Autumn	51° South in Winter	29° 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 Alma, 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 Alma, 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 Alma, United States

Topographical Features Around Alma

The landscape surrounding Alma, Arkansas is characterized by gently rolling hills and valleys that form part of the Arkansas River Valley region. This area sits within the transition zone between the Ozark Mountains to the north and the Ouachita Mountains to the south, creating a moderately undulating terrain with elevations typically ranging from about 400 to 800 feet above sea level.

The Arkansas River flows roughly east-west through this region, creating broad floodplains and terraces that provide some of the flattest terrain in the area. These river bottoms and adjacent terraces offer relatively level ground that extends for several miles in width along the river corridor. The surrounding uplands feature moderate slopes with occasional steeper ridges, but overall the topography is less rugged than the mountainous regions to the north and south.

Agricultural land dominates much of the landscape, with a mix of pastures, crop fields, and scattered woodlands covering the hills and valleys. The area experiences a humid subtropical climate with generally clear skies during much of the year, making it potentially suitable for solar energy development in appropriate locations.

Optimal Areas for Large-Scale Solar Development

The most promising locations for large-scale solar photovoltaic installations would be found on the relatively flat agricultural lands within the Arkansas River Valley itself. These areas offer several key advantages including minimal grading requirements, reduced installation costs, and fewer shading issues compared to hillier terrain. The river terraces and bottomlands provide expansive open spaces that could accommodate substantial solar arrays without significant topographical constraints.

South-facing slopes on the gentler hills surrounding the valley floor would represent the second-best option for solar development. These locations could capture optimal sun exposure while still maintaining reasonable installation costs. However, careful site selection would be necessary to avoid slopes that are too steep or irregular, which would increase construction complexity and reduce panel efficiency.

Areas to avoid for large-scale solar development would include the steeper ridgelines and heavily forested sections that are common in the transition zones toward the Ozark and Ouachita Mountains. These locations would require extensive clearing and grading, making them economically less viable for commercial solar projects. Additionally, the narrow valleys and hollows between ridges would be prone to shading issues that could significantly impact energy production.

The existing agricultural infrastructure in the flatter areas also provides advantages such as established road access and proximity to electrical transmission lines, both of which are crucial considerations for large-scale solar installations. Many of the open pastures and crop fields in the river valley could potentially be converted to solar use or integrated with agricultural activities through agrovoltaic approaches.

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.