Diyālá, Iraq presents a moderately good location for solar energy generation, though with significant seasonal variation that affects its year-round viability. Located in the Northern Sub Tropics at coordinates 34°N, 45°E, this region experiences substantial differences in solar output throughout the year.

Seasonal Solar Performance

The location shows strong summer performance with solar panels generating 8.64 kWh per day for each kW of installed capacity. Spring also provides good output at 6.93 kWh/day per kW. However, winter production drops dramatically to just 3.49 kWh/day per kW, representing less than half the summer output. Autumn falls in the middle range at 5.25 kWh/day per kW. Summer and spring are clearly the ideal times for solar generation at this location, with summer being the peak season. The substantial drop-off during winter months means that any solar installation would need to account for this seasonal variation in planning energy storage or backup systems. For maximum year-round energy production, solar panels should be installed at a fixed tilt angle of 29 degrees facing south. This angle optimizes the total annual solar collection by accounting for the sun's changing position throughout the year and the varying solar irradiance levels.

Environmental and Weather Challenges

Several significant factors in the Diyālá region can impede solar panel performance:

• Dust storms and sand accumulation from desert conditions
• High summer temperatures that reduce panel efficiency
• Occasional heavy rainfall that can cause temporary flooding
• Security concerns affecting maintenance access

Dust accumulation is particularly problematic in this region, as even a thin layer of dust can reduce solar panel output by 15-25%. The frequent dust storms common to Iraq can quickly coat panels, significantly reducing their effectiveness.

Preventative Measures for Better Performance

To maximize solar energy production despite these challenges, several installation strategies should be implemented: Regular cleaning systems are essential, including automated cleaning mechanisms or easy access for manual cleaning. Installing panels with self-cleaning coatings can help reduce dust accumulation between cleanings. Proper ventilation around panels helps manage the heat buildup that reduces efficiency during hot summer months. Mounting systems should allow adequate airflow beneath the panels. Robust mounting systems designed to withstand strong winds from dust storms are crucial. The mounting hardware should also elevate panels sufficiently to prevent flood damage during heavy rains. Installing monitoring systems allows for quick detection of performance drops, enabling prompt maintenance. Remote monitoring capabilities are particularly valuable given potential access limitations in the region. While Diyālá offers decent solar potential, especially during summer and spring months, the challenging environmental conditions require careful planning and robust installation practices to achieve optimal long-term performance.

Note: The Northern Sub Tropics extend from 23.5° latitude North up to 35° latitude.

So far, we have conducted calculations to evaluate the solar photovoltaic (PV) potential in 36 locations across Iraq. This analysis provides insights into each city/location's potential for harnessing solar energy through PV installations.

Link: Solar PV potential in Iraq by location

Solar output per kW of installed solar PV by season in Diyālá

Seasonal solar PV output for Latitude: 34, Longitude: 45 (Diyālá, Iraq), 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 29° South in Diyālá, Iraq

To maximize your solar PV system's energy output in Diyālá, Iraq (Lat/Long 34, 45) throughout the year, you should tilt your panels at an angle of 29° 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 Diyālá, Iraq

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 Diyālá, Iraq. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 29° South tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
18° South in Summer	38° South in Autumn	49° South in Winter	26° 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 Diyālá, Iraq

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 Diyālá, Iraq.

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 Diyālá, Iraq

Regional Topography Around Diyālá

The landscape surrounding Diyālá in Iraq presents a diverse topographical character that transitions from mountainous terrain in the northeast to flatter plains toward the southwest. The region sits within the broader Mesopotamian basin, where the Diyala River cuts through varied elevations as it flows toward its confluence with the Tigris River. To the northeast, the terrain becomes increasingly mountainous as it approaches the Zagros Mountain foothills. These elevated areas feature rolling hills and steep-sided valleys that create significant variations in elevation across relatively short distances. The mountainous zones are characterized by rocky outcrops, seasonal watercourses, and irregular terrain that would present substantial challenges for large-scale development projects. Moving southwest from the city, the landscape gradually flattens into the characteristic alluvial plains of the Mesopotamian region. These areas consist primarily of sedimentary deposits laid down over millennia by the region's river systems. The plains are interrupted by occasional low ridges and gentle undulations, but generally maintain relatively consistent elevations with gradual slopes.

River Valley Influence

The Diyala River valley itself creates a distinct topographical feature running roughly northwest to southeast through the region. The river has carved a shallow but noticeable depression in the surrounding landscape, with fertile floodplains extending on either side. These riparian areas are generally flat and well-suited to agriculture, but may experience seasonal flooding that could impact infrastructure development. The valley walls are typically gentle rather than steep, creating a gradual transition from the river corridor to the surrounding higher ground. This topographical arrangement has historically made the area attractive for settlement and agriculture, as evidenced by the numerous communities scattered throughout the region.

Optimal Areas for Large-Scale Solar Development

The most suitable locations for extensive solar photovoltaic installations would be found in the southwestern portions of the region, where the terrain transitions into the broader Mesopotamian plains. These areas offer several key advantages for solar development, including relatively flat topography that minimizes grading and construction costs, stable geological conditions suitable for supporting large installations, and sufficient space for extensive arrays without significant terrain obstacles. The gently rolling plains located 15-30 kilometers southwest of the city center would be particularly well-suited for solar development. These areas maintain enough elevation to avoid seasonal flooding concerns while providing the level terrain necessary for efficient panel installation and maintenance access. The consistent soil composition in these plains areas also supports stable foundation systems for mounting structures. Areas closer to the river valley might seem attractive due to their flat nature, but the potential for seasonal water level changes and the agricultural value of these fertile lands make them less ideal for permanent solar installations. Similarly, the mountainous terrain to the northeast, while offering good exposure in many locations, presents significant challenges in terms of access, grading costs, and the complex mounting systems required for irregular terrain. The transitional zone between the river plains and the higher ground offers an optimal compromise, providing stable, relatively flat terrain while avoiding both flood-prone areas and the complexities of mountainous installation sites. These locations also tend to have good access to existing road networks, which would facilitate both construction and ongoing maintenance operations for large-scale solar facilities.

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.