Panama 50MW Solar Power Plant Electrical Cable Supply Project

This project is a 50MW utility-scale photovoltaic (PV) power plant located in Panama, Central America, developed to support the country’s growing electricity demand and accelerate the transition toward renewable energy, and it belongs to the solar energy industry, with a primary focus on power transmission, inverter system interconnection, and grid integration, making it a typical large-scale electrical infrastructure and energy supply project requiring high-performance and highly reliable cable systems.
The project was executed between 2024 and 2025, covering key stages such as engineering design, equipment installation, cable laying, and final grid connection, during which our team participated as a cable supplier, providing a complete range of low-voltage power cables and building wires to support different sections of the solar plant, including DC collection systems, AC transmission lines, inverter stations, and cable tray installations across the solar array.
Due to its location in a tropical climate zone, the project site is exposed to high ambient temperatures, strong ultraviolet radiation, high humidity levels, and seasonal heavy rainfall, which significantly increase the risk of insulation aging, corrosion, and performance degradation, and therefore require all electrical components, especially cables, to maintain stable performance under long-term environmental stress while ensuring compliance with international safety and certification standards.

Detailed Technical Requirements from the Client

During the engineering design and procurement phase, the client established strict and clearly defined technical specifications for cable selection, as the system was expected to operate reliably for more than 25 years while being exposed to Panama’s tropical climate, which includes strong ultraviolet radiation, high humidity, and frequent rainfall, all of which place higher demands on insulation performance and material durability.

The project required a voltage rating of 600V to 1000V, covering both DC collection systems and AC transmission circuits, while also specifying a temperature rating of 90°C for both wet and dry conditions, with the ability to withstand short-term overload temperatures up to 130°C; installation environments were highly complex, including outdoor cable trays exposed to direct sunlight, underground conduit systems in constantly humid conditions, and inverter stations operating under elevated temperatures, which required cables to maintain consistent electrical performance without degradation.

In addition, all cable products had to comply with UL and IEC certification standards to meet both international engineering requirements and local regulations, while the required current carrying capacity ranged from 120A to 380A, depending on whether the cables were used for branch circuits or main feeder lines, meaning that conductor materials, insulation structures, and heat dissipation performance all needed to be carefully optimized to balance safety, efficiency, and cost control.

Engineering Challenges Under Harsh Environmental Conditions

This project presented multiple technical challenges that are highly representative of large-scale solar installations, where environmental exposure and installation complexity can significantly impact long-term system reliability.

One of the primary challenges was continuous UV exposure, which can rapidly degrade inferior insulation materials and lead to cracking or reduced dielectric strength over time, while another major concern was high humidity and water ingress, particularly in underground installations where insufficient moisture resistance could result in insulation failure or conductor corrosion; in addition, the project required enhanced flame-retardant performance, especially in inverter stations and power distribution areas where stricter fire safety standards apply.

From an installation perspective, the project involved long-distance cable routing with frequent bending and pulling through conduits, increasing the risk of mechanical damage if the cable lacked sufficient flexibility or tensile strength, while at the same time, the contractor needed to balance strict budget constraints with high-performance requirements, as well as meet demanding certification standards, making cable selection a critical and complex decision.

Customized Cable Selection Strategy and Product Configuration

To address these challenges, our team designed a comprehensive cable solution by selecting multiple UL-certified cable types based on their specific advantages and suitability for different application scenarios, ensuring optimal performance, safety, and cost efficiency across the entire system.

For the main power transmission system, 4/0 AWG XHHW-2 aluminum and copper cables were selected due to their XLPE insulation, which provides excellent thermal stability and allows continuous operation at 90°C in both wet and dry environments, while also offering strong resistance to UV radiation and moisture, making them significantly more durable than conventional PVC-insulated cables and ideal for long-distance power transmission with stable ampacity performance.

For underground conduit installations and high-humidity environments, THWN-2 electrical cable 600V copper was used because of its dual wet and dry rating, which ensures reliable performance even in water-exposed conditions, while its nylon outer jacket reduces friction during installation, minimizing damage during pulling and making it more suitable than standard THHN for complex routing scenarios.

For internal wiring within inverter systems and electrical panels, THHN copper building wire was applied, as it provides excellent heat resistance in dry environments and offers a cost-effective solution for controlled installation areas where high temperature tolerance is still required.

For cable tray systems and exposed runs across the solar array, TC-ER tray cable was utilized, as it supports direct installation without conduit, significantly reducing installation time and cost, while its robust structure ensures strong resistance to abrasion, bending, and external mechanical stress, making it particularly suitable for large-scale outdoor applications.

Installation Performance and Project Outcomes

With the implementation of these cable solutions, the project achieved stable performance during the initial commissioning phase, with no cable-related failures reported, while the optimized cable configuration contributed to improved installation efficiency and reduced construction time, helping the contractor meet tight project deadlines without compromising quality.

In addition, the selected cables demonstrated excellent resistance to environmental stress, including UV exposure, humidity, and temperature variations, ensuring long-term durability and reducing potential maintenance costs throughout the project lifecycle.

According to the client’s feedback, our team’s cable solutions fully met all technical and certification requirements while also simplifying the installation process and reducing operational risks, and as a result of this successful cooperation, the client has already initiated discussions for repeat orders in future expansion projects and has recommended our team to other contractors involved in renewable energy developments across Latin America.

Supplier Value in Large-Scale Energy Projects

This project clearly demonstrates that in large-scale solar power developments, where environmental conditions are demanding and long-term system performance directly impacts return on investment, selecting the right cable supplier is not just a procurement decision but a strategic factor that influences project success, as a well-designed cable solution can significantly improve installation efficiency, enhance system reliability, and reduce lifecycle costs.

Our team focuses on supplying high-quality cable products that comply with international standards such as UL and IEC, including XHHW, THHN, THWN-2, and TC-ER, which are widely used in renewable energy, commercial construction, and industrial applications, while offering strong advantages in quality control, customized solutions, competitive pricing, and reliable delivery, making us a dependable partner for global projects; if you are currently planning a project and require a cable solution that balances performance, compliance, and cost efficiency, working with our team will provide you with a practical and reliable choice.

Contact Us

Dongguan GERITEL Electrical Co., Ltd.

Tel / WhatsApp / WeChat: +86 135 1078 4550 / +86 136 6257 9592
Email: manager01@greaterwire.com