Gorgan, Golestan, Iran presents a moderately favorable location for year-round solar PV energy generation, though with significant seasonal variations that potential solar installers should carefully consider.

Seasonal Solar Performance

The solar energy output at this Northern Temperate Zone location shows considerable fluctuation throughout the year. Summer delivers the strongest performance at 7.81 kWh per day per kW of installed capacity, making it the peak season for solar generation. Spring follows as the second-best period with 6.01 kWh per day per kW, offering substantial energy production during the transition months. Autumn sees a notable decline to 4.54 kWh per day per kW, while winter represents the most challenging period with only 3.33 kWh per day per kW of installed solar capacity. This winter dip is typical for locations at this latitude but still provides reasonable baseline energy production.

Optimal Panel Configuration

For fixed panel installations at Gorgan, Golestan, the ideal tilt angle is 32 degrees facing south to maximize total year-round solar production. This angle represents the optimal compromise across all seasons, accounting for the sun's varying position throughout the year and the location's specific latitude.

Environmental and Weather Challenges

Several local factors in Gorgan could potentially impact solar panel performance and require preventative measures:

• Dust and Sand Accumulation: The region's proximity to desert areas and dry conditions can lead to dust buildup on panels, reducing efficiency by blocking sunlight
• High Summer Temperatures: Extreme heat can decrease panel efficiency, as solar panels typically lose performance as temperatures rise above optimal operating ranges
• Seasonal Precipitation Patterns: While winter brings some natural panel cleaning through rainfall, extended dry periods require manual maintenance
• Wind and Sandstorms: Occasional strong winds may carry abrasive particles that can damage panel surfaces over time

Preventative Installation Measures

To maximize energy production despite these challenges, several installation strategies prove beneficial. Regular cleaning schedules become essential, particularly during dry seasons when dust accumulation peaks. Installing panels with adequate ventilation spacing helps manage heat buildup during intense summer months. Choosing panels with anti-reflective coatings and robust glass surfaces provides better resistance to dust adhesion and wind-borne particles. Proper grounding and secure mounting systems protect against wind damage while ensuring optimal panel positioning. Incorporating automated cleaning systems or planning for frequent manual cleaning during peak dust seasons helps maintain consistent energy output. Additionally, selecting high-quality inverters rated for the local temperature ranges ensures system reliability throughout Gorgan's varied seasonal conditions.

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 29 locations across Iran. This analysis provides insights into each city/location's potential for harnessing solar energy through PV installations.

Link: Solar PV potential in Iran by location

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

Seasonal solar PV output for Latitude: 36.8409, Longitude: 54.4368 (Gorgan, Iran), 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 32° South in Gorgan, Iran

To maximize your solar PV system's energy output in Gorgan, Iran (Lat/Long 36.8409, 54.4368) throughout the year, you should tilt your panels at an angle of 32° 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 Gorgan, Iran

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 Gorgan, Iran. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 32° South tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
21° South in Summer	41° South in Autumn	52° 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 Gorgan, Iran

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 Gorgan, Iran.

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 Gorgan, Iran

Topography Around Gorgan

Gorgan sits in a fascinating transitional zone between the Caspian Sea lowlands to the north and the rising foothills of the Alborz Mountains to the south. The city itself is positioned on relatively flat terrain at a modest elevation, surrounded by gently rolling plains that extend northward toward the Caspian Sea coast, approximately 20 kilometers away. This northern region consists of fertile lowlands with minimal elevation changes, creating expansive flat areas that stretch for many kilometers.

To the south and southeast of Gorgan, the landscape begins its gradual ascent toward the Alborz mountain range. These foothills present a series of undulating hills and valleys, with elevations increasing progressively as one moves away from the city center. The terrain becomes more varied and steep, featuring numerous ridges and depressions that characterize the transition zone between the coastal plains and the mountainous interior.

The Gorgan River meanders through the region, creating a fertile valley that has supported agriculture for centuries. This river system has carved gentle depressions in the landscape, but the overall topography remains relatively manageable for development purposes. The surrounding plains are interspersed with agricultural fields, small settlements, and patches of natural vegetation typical of the semi-arid climate zone.

Optimal Areas for Large-Scale Solar Development

The most suitable locations for extensive solar photovoltaic installations lie in the flat to gently rolling plains that extend northward and westward from Gorgan toward the Caspian Sea. These areas offer several critical advantages for solar development, including minimal topographical obstacles, reduced grading requirements, and excellent accessibility for construction and maintenance activities.

The expansive lowlands northwest of the city present particularly attractive opportunities, where large tracts of relatively unused land provide ample space for utility-scale solar farms. The gentle terrain in these areas minimizes the need for extensive earthwork and reduces installation costs significantly. Additionally, the flat nature of this landscape ensures optimal panel orientation and reduces shading issues that might occur on more varied terrain.

Areas to the east and northeast of Gorgan also show promise for solar development, where the topography remains favorable despite some minor undulations. These regions benefit from good transportation access via existing road networks while maintaining sufficient distance from urban development to avoid land use conflicts.

The southern and southeastern regions, while potentially viable for smaller installations, present greater challenges due to the increasingly hilly terrain as one approaches the Alborz foothills. The more complex topography in these areas would require additional site preparation and could result in suboptimal panel positioning, making them less economically attractive for large-scale solar development compared to the northern plains.

Iran solar PV Stats as a country

Iran ranks 52nd in the world for cumulative solar PV capacity, with 456 total MW's of solar PV installed. This means that 0.40% of Iran's total energy as a country comes from solar PV (that's 40th in the world). Each year Iran is generating 5 Watts from solar PV per capita (Iran ranks 80th in the world for solar PV Watts generated per capita). [source]

Are there incentives for businesses to install solar in Iran?

Yes, there are incentives for businesses wanting to install solar energy in Iran. The Iranian government has implemented a number of policies and programs to encourage the development of renewable energy sources, including solar energy. These include tax exemptions, subsidies, and other financial incentives such as low-interest loans. Additionally, the government has set up a Renewable Energy Organization (SUNA) which provides technical assistance and support for businesses interested in installing solar systems.

Do you have more up to date information than this on incentives towards solar PV projects in Iran? 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.