Solar EPC Best Practices in the MENA Region: Lessons from 15 Years in the Field

After 15 years and more than 280 completed solar projects across the Middle East and Africa, Green Sources Investment has accumulated a body of knowledge that goes far beyond textbook solar engineering. The MENA region presents a unique combination of environmental, logistical, and regulatory challenges that demand specialised expertise — and the lessons learned on our project sites have shaped the way we approach every new installation.

In the MENA region, no two sites are the same. A project in the Jordanian highlands faces fundamentally different conditions from one on the Aqaba coastline or in the Saharan interior of Chad. Comprehensive site assessment — covering solar irradiance, wind loads, soil bearing capacity, flood risk, grid proximity, and access logistics — is the single most important investment a project team can make before breaking ground.

We have seen projects elsewhere in the region suffer from inadequate geotechnical surveys, resulting in pile foundations that failed to achieve design depth in rocky terrain, or civil works that were undermined by unexpected subsurface water. At GSI, every project begins with a thorough site investigation that informs every subsequent engineering decision.

Solar modules, inverters, and mounting systems are tested under Standard Test Conditions (STC) — 25°C cell temperature, 1000 W/m² irradiance, and a specific air mass coefficient. In the MENA region, actual operating conditions routinely deviate significantly from STC, with cell temperatures exceeding 70°C in summer and irradiance levels that can cause thermal stress on poorly specified components.

Our engineering team applies detailed energy yield modelling using site-specific meteorological data, applying temperature correction factors and soiling loss estimates based on local dust accumulation rates. In desert environments, soiling alone can reduce annual energy yield by 5–15% if not managed through an appropriate cleaning programme — a factor that must be built into both the financial model and the O&M plan from day one.

DC cabling is one of the most common sources of long-term performance degradation and safety incidents in utility-scale solar plants. In high-temperature environments, cable insulation degrades faster, and poorly designed cable management systems can create hotspots that accelerate this process.

GSI specifies UV-stabilised, double-insulated DC cables rated for the maximum expected operating temperature, with cable trays and conduits designed to minimise thermal buildup. String-level monitoring is incorporated into all our utility-scale designs, enabling rapid identification of underperforming strings and reducing the time to fault resolution.

Central inverters offer cost advantages at large scale but require careful placement to manage thermal loads and minimise DC cable runs. String inverters offer greater flexibility and redundancy but increase the complexity of AC collection systems. The right choice depends on project scale, site layout, grid requirements, and the client's O&M capability.

In our experience, the inverter room design is often underestimated in early project planning. Adequate ventilation, dust filtration, and thermal management are essential in desert environments — an inverter room that overheats will throttle output and shorten equipment life, eroding the project's financial returns.

Connecting a utility-scale solar plant to the grid requires close coordination with the local distribution or transmission operator. Protection relay settings, reactive power capability, fault ride-through requirements, and anti-islanding protection must all be designed in accordance with the grid code of the relevant country — and these codes vary significantly across the MENA region.

GSI maintains in-house expertise in grid integration across Jordan, the UAE, Saudi Arabia, and several African markets, enabling us to navigate the regulatory and technical requirements of each jurisdiction efficiently.

A solar plant is a 25-year asset. The quality of the O&M programme over that period will determine whether the plant delivers its projected returns or falls short. GSI's O&M services are built around three pillars: preventive maintenance, performance monitoring, and rapid corrective response.

Preventive maintenance schedules are calibrated to local conditions — in dusty desert environments, panel cleaning frequency may need to be as high as monthly during dry seasons. Our remote monitoring platform provides real-time visibility into plant performance, with automated alerts for inverter faults, string underperformance, and communication failures.

One of the most significant lessons from 15 years of MENA project delivery is the importance of building strong local supply chains and investing in local workforce development. Projects that rely entirely on imported labour and materials face higher costs, longer lead times, and greater exposure to supply chain disruption.

GSI has invested consistently in training local engineers and technicians across our markets, building a workforce that combines international best-practice knowledge with deep familiarity with local conditions, regulations, and logistics.

The MENA solar market is entering a new phase of maturity, with larger projects, more sophisticated offtake structures, and increasing emphasis on storage integration and grid services. GSI is well positioned to lead this transition, drawing on the experience, relationships, and technical depth built over 15 years of project delivery across the region.

We remain committed to sharing knowledge, raising standards, and demonstrating that world-class solar infrastructure is achievable in even the most challenging environments on earth.