Costa Rica Photovoltaic Power Plant Project

Located in Guanacaste, Costa Rica, a region well known for its strong solar irradiation and rapidly expanding renewable energy infrastructure, a large-scale photovoltaic power plant project was carried out between 2024 and 2026 with the primary objective of enhancing national clean energy capacity and improving grid reliability, and within this project we participated as a professional cable supplier by providing a comprehensive range of electrical cable solutions that supported power transmission, inverter connections, and overall system integration across multiple stages of construction and commissioning.
• Country / Region: Costa Rica (Guanacaste)
• Industry: Photovoltaic (Solar Energy)
• Project Type: Power transmission and equipment connection
• Construction Period: 2024–2026
Client’s Precise Requirements
Due to the project being located in a tropical environment characterized by high ambient temperatures, intense ultraviolet exposure, and persistent humidity, the client required cable products capable of maintaining stable electrical performance over long operational periods while complying with strict international standards, and therefore specified detailed technical parameters including DC voltage ratings of 1000V to 1500V for photovoltaic array systems, AC voltage ratings of 600V for inverter output distribution, and medium voltage transmission levels ranging from 15kV to 35kV for grid integration, alongside a mandatory temperature rating of at least 90°C under both wet and dry conditions with the ability to withstand short-term thermal overloads up to approximately 130°C.
At the same time, the installation environment required cables to perform reliably in outdoor exposed conditions with continuous UV radiation, underground conduit systems where moisture accumulation is common, and areas subject to corrosion risks, while all products needed to comply with UL standards such as UL83 and UL44 as well as relevant IEC requirements for photovoltaic systems, and in addition the client defined clear ampacity expectations, with DC collection cables typically operating within a range of 120A to 380A, AC distribution cables between 90A and 310A, and medium voltage feeder cables reaching capacities of over 600A depending on conductor sizing and installation conditions, which collectively created a demanding balance between electrical performance, environmental durability, and cost efficiency.
Key Project Challenges
Throughout the project execution phase, several technical and logistical challenges arose, including the need to ensure long-term insulation stability under continuous ultraviolet exposure that could otherwise accelerate material aging, the requirement to maintain consistent electrical conductivity in high humidity and temperature fluctuation environments, and the difficulty of installing cables over long distances with multiple bends and conduit routing constraints, which significantly increased mechanical stress during installation.
In addition, the strict adherence to UL certification standards limited the range of acceptable cable types, requiring precise material selection and compliance verification, while the client simultaneously aimed to control overall project costs without compromising on performance, creating a complex scenario in which high-performance, flame-retardant, oil-resistant, and UV-resistant cable solutions needed to be delivered within a competitive budget framework, all while ensuring that the cables could withstand pulling forces and physical wear during installation without damage.
Our Cable Solution
In response to these challenges, we provided a carefully engineered multi-cable solution tailored to different segments of the photovoltaic power system, selecting several UL-compliant cable types based on their structural advantages and application suitability in order to ensure optimal system performance and long-term reliability.
XHHW-2 Electrical Cable for DC Feeders and Main Power Lines
For the primary DC feeder lines and part of the power transmission system, 4/0 AWG XHHW-2 copper conductor XLPE insulation 600V utility cable was selected due to its cross-linked polyethylene insulation, which provides superior thermal resistance and electrical stability compared to conventional PVC-insulated cables, allowing it to operate reliably at 90°C in both wet and dry conditions while offering enhanced resistance to environmental stress, and this made it particularly suitable for long-distance routing in outdoor and underground installations where temperature fluctuations and moisture exposure are common, while also supporting high ampacity requirements in utility-scale solar applications.
THWN-2 Electrical Cable for AC Distribution
For the inverter output and low-voltage AC distribution sections, 2/0 AWG THWN-2 copper wire 600V wet dry rated conduit cable was utilized because of its dual wet and dry rating, flexible installation characteristics within conduit systems, and cost-effective performance, which allowed the project to maintain compliance with UL83 standards while ensuring ease of installation across complex routing paths, especially in sections where cables needed to be pulled through conduits with multiple bends, thereby reducing labor difficulty and installation time without sacrificing electrical safety or durability.
PV Cable for Photovoltaic Array Connections
In the photovoltaic array section, 10 AWG PV cable 1500V DC tinned copper UV resistant solar cable was deployed in order to address the extreme environmental exposure conditions, as this type of cable provides exceptional resistance to ultraviolet radiation, ozone, and thermal aging, significantly outperforming standard building wires in outdoor applications, and its design life exceeding 25 years ensures that the solar modules can maintain stable electrical connections throughout the operational lifespan of the power plant without frequent maintenance or replacement.
Medium Voltage XLPE Cable for Grid Integration
For the transmission of generated power from the plant to the grid, medium voltage XLPE cables with voltage ratings between 15kV and 35kV were selected due to their high dielectric strength, excellent electrical shielding properties, and ability to maintain stable performance over long transmission distances, which is essential for minimizing energy loss and ensuring safe grid integration in large-scale renewable energy projects.
Results and Client Feedback
Following the implementation of this integrated cable solution, the photovoltaic power plant achieved stable and efficient power generation and transmission performance under challenging environmental conditions, while installation efficiency was significantly improved due to the optimized cable selection and structural design, which reduced mechanical stress during installation and minimized the risk of damage.
The client expressed strong satisfaction with the overall performance of the supplied cables, noting that the products not only fully met the specified technical and certification requirements but also demonstrated excellent durability and reliability during operation, and as a result of this successful collaboration the client has proceeded to initiate repeat orders and has recommended us to other contractors involved in renewable energy and infrastructure projects, thereby reinforcing long-term cooperation and market credibility.

Choose Us for Your Next Project
For construction companies, EPC contractors, and energy project developers operating in international markets, especially those involved in photovoltaic plants, infrastructure upgrades, or industrial power systems, selecting the right cable supplier often means balancing strict certification requirements, demanding performance standards, challenging installation environments, tight project timelines, and overall budget control, and based on our experience in projects like this Costa Rica photovoltaic power plant, we are able to provide not only compliant and reliable cable products, but also practical, project-oriented solutions that help simplify procurement decisions and improve execution efficiency.
Our product portfolio covers a wide range of UL and IEC certified cables, including XHHW-2, THWN-2, PV cable, and medium voltage XLPE cables, which are widely used in solar power plants, commercial buildings, and industrial facilities, and through consistent use of high-quality raw materials, strict quality control processes, and flexible production arrangements, we ensure that every cable delivered meets both technical expectations and long-term durability requirements, while our team also supports clients with tailored cable selection, cost optimization strategies, and responsive delivery schedules to help keep projects on track.
If you are currently planning or executing a project and require dependable cable solutions that align with both performance and compliance expectations, you can reach out to us for more detailed product information, technical support, and customized quotations, and we would be glad to explore how we can support your upcoming projects with efficient and reliable cable supply.
Contact Us
Company: Dongguan GERITEL Electrical Co., Ltd.
Tel / WhatsApp / WeChat: +86 135 1078 4550 / +86 136 6257 9592
Email: manager01@greaterwire.com