Angola & Djibouti Solar Power Plant Construction

In 2023-2024, as Angola and Djibouti accelerated their renewable energy transition, a large-scale solar power plant construction project was launched in both countries to address the growing demand for clean electricity and reduce reliance on fossil fuels. Djibouti’s Grand Bara solar power plant, with a 25MW installed capacity and 5MW energy storage system, and Angola’s mid-sized solar farms in the southern region, required high-quality, durable cables to ensure stable long-term operation under harsh outdoor conditions. As a professional wire and cable exporter, Dongguan Greater Wire & Cable Co., Ltd. successfully secured the cable supply contract for this cross-border project, providing customized solutions with H1Z2Z2-K Solar Cable, PVO7AC-F Cable, and HO7ZZ-F Cable. This case study details how we addressed the client’s core pain points, leveraged our advantages, and delivered a successful cooperation that won the client’s trust.

1. Client Pain Points and Core Demands

The client, a leading renewable energy project contractor with operations in both Angola and Djibouti, was responsible for the construction of multiple solar power plants in the two countries. As the project progressed, they encountered several critical challenges related to cable selection and supply, which directly threatened the project’s timeline, safety, and long-term efficiency—these pain points became the key reasons they sought a reliable cable partner.

First, the harsh environmental conditions in both countries posed strict requirements for cable durability. Djibouti’s Grand Bara region is a sun-drenched desert with intense ultraviolet (UV) radiation, extreme temperature fluctuations (ranging from -5℃ to 70℃), and occasional sandstorms. Angola’s southern solar plant sites face high humidity, frequent rainfall, and acid rain in some areas. The client’s previous attempts to use low-cost, uncertified cables resulted in rapid insulation aging, sheath cracking, and even short-circuit risks after just a few months of outdoor use, leading to costly rework and delays.

Second, the project required compliance with international standards and local regulations. Both Angola and Djibouti mandate that solar power project components, including cables, must hold valid international certifications to pass inspection and grid-connection approval. The client initially struggled to find a supplier that could provide cables with official IEC certifications (IEC 62930 for solar cables), which is a global benchmark for safety and performance in photovoltaic systems. Without these certifications, the project could not obtain the necessary permits to proceed.

Third, the client needed a supplier with proven experience in large-scale solar power projects. Solar power cables are not interchangeable with ordinary building cables—they require specific structural designs to withstand long-term outdoor exposure, high temperatures from solar panels, and stable power transmission for 25-30 years. The client emphasized that they needed a partner who understood the unique requirements of solar projects and could provide reliable technical support, rather than just a product supplier.

Finally, the client had strict requirements for delivery efficiency and product specifications. The project had a tight construction schedule, and any delay in cable delivery would disrupt the entire construction process. Additionally, they needed customized cable specifications to match different parts of the solar system (e.g., panel-to-inverter connections, inverter-to-substation connections), which many suppliers struggled to fulfill quickly and accurately.

After extensive market research and supplier evaluation, the client chose Dongguan Greater Wire & Cable Co., Ltd. because of our IEC certification, rich experience in solar power projects, high-quality products, and ability to provide customized solutions.

2. Cable Selection and Specification Matching

Based on the client’s pain points and the specific requirements of the Angola and Djibouti solar projects, our technical team conducted in-depth communication with the client’s engineering team to design a targeted cable solution. We selected three core cable models—H1Z2Z2-K Solar Cable, PVO7AC-F Cable, and HO7ZZ-F Cable—each tailored to different application scenarios in the solar power plants, and provided detailed specifications to ensure optimal performance.

2.1 H1Z2Z2-K Solar Cable: For DC Power Transmission

The H1Z2Z2-K Solar Cable is a high-performance DC solar cable specifically designed for PV module-to-module, module-to-junction box, and junction box-to-inverter connections. Unlike ordinary cables, it adopts a double-insulated structure with XLPO (cross-linked polyolefin) insulation and sheath, which provides excellent UV resistance, ozone resistance, and moisture resistance—critical for withstanding the harsh desert and humid conditions in Djibouti and Angola.

For this project, the client purchased 80,000 meters of H1Z2Z2-K Solar Cable with the following key specifications (selected based on their system design):

1-core, 4mm² (for junction box-to-inverter connections, medium current transmission)

1-core, 6mm² (for main DC lines in large-scale array areas)

This cable meets IEC 62930 standards, with a rated DC voltage of 1.5kV and an operating temperature range of -40℃ to 120℃, ensuring stable performance even in extreme temperature fluctuations. Compared to ordinary PVC cables, it has a 25-year service life (matching the solar plant’s design life) and significantly reduces the risk of insulation aging and short circuits.

2.2 PVO7AC-F Cable: For AC Power Transmission

The PVO7AC-F Cable is a dedicated AC solar cable used for inverter-to-transformer, transformer-to-distribution cabinet, and distribution cabinet-to-grid connections. It is designed to handle high AC voltage and current, with excellent thermal stability and flame-retardant properties—essential for ensuring safe power transmission in the solar plant’s AC section.

A key requirement for the project was the 3×2.5 mm PVO7AC-F Cable, which was used for the medium-voltage AC lines connecting inverters to small transformers. This specification was chosen for its balanced current-carrying capacity and flexibility, making it easy to install in narrow spaces between equipment.

In addition to the 3×2.5 mm PVO7AC-F Cable, the client purchased 65,000 meters of other specifications of PVO7AC-F Cable, including:

3-core, 4mm² (for main AC lines in small-scale solar arrays)

3-core, 6mm² (for transformer-to-distribution cabinet connections)

4-core, 2.5mm² (for control and signal transmission in AC systems)

Like the H1Z2Z2-K Solar Cable, the PVO7AC-F Cable holds IEC certification and uses E-beam cross-linked compounds, which enhance its UV resistance and hydrolyzation resistance. Compared to non-solar-specific AC cables, it has a lower conductor resistance, reducing energy loss and improving the solar plant’s overall efficiency.

2.3 HO7ZZ-F Cable: For Auxiliary and Control Systems

The HO7ZZ-F Cable is a flexible, low-smoke halogen-free (LSZH) cable used for the solar plant’s auxiliary systems, including control panels, monitoring equipment, and lighting. It is designed for both fixed and semi-flexible installations, with excellent oil resistance, flame retardancy, and mechanical strength—ideal for use in the plant’s indoor and outdoor auxiliary areas.

The client purchased 35,000 meters of HO7ZZ-F Cable with the following specifications:

2-core, 1.5mm² (for lighting systems in the control room)

3-core, 2.5mm² (for control signal transmission between equipment)

5-core, 1.0mm² (for monitoring system connections)

The HO7ZZ-F Cable meets IEC 60332-1 flame-retardant standards, producing minimal smoke and no toxic gases in the event of a fire—protecting both equipment and personnel. Its flexibility also makes it easy to install in complex routing scenarios, reducing installation time and labor costs.

3. IEC Certification and Quality Control

Safety is the top priority for solar power projects, and our ability to provide IEC-certified cables was a key factor in winning the client’s trust. All three cable models supplied for the project hold official IEC certifications: H1Z2Z2-K Solar Cable and PVO7AC-F Cable comply with IEC 62930 (the global benchmark for solar cables), while HO7ZZ-F Cable complies with IEC 60332-1 and IEC 60228 standards.

To ensure consistent quality, we implemented strict quality control measures throughout the production process. Raw materials (including high-purity tinned copper conductors, XLPO insulation, and LSZH sheath materials) are sourced from reliable suppliers and undergo rigorous testing before production. During manufacturing, we conduct real-time inspections of conductor resistance, insulation thickness, and sheath quality. After production, every batch of cables undergoes voltage testing (2500V for HO7ZZ-F Cable) and aging testing to simulate 25 years of outdoor use, ensuring they meet the project’s long-term performance requirements.

We also provided the client with complete certification documents and test reports, which helped them smoothly pass local inspection and grid-connection approval in both Angola and Djibouti. This eliminated the client’s concerns about compliance risks and ensured the project could proceed without delays.

4. Efficient Coordination and Timely Supply

Understanding the client’s tight construction schedule, we prioritized the project and established a dedicated project team to coordinate production, quality control, and logistics. After confirming the order and specifications, we adjusted our production schedule to ensure the cables were manufactured within the agreed timeframe. Our production capacity allowed us to complete the manufacturing of 180,000 meters of cables (total of all three models) efficiently, without compromising quality.

For logistics, we partnered with professional international freight forwarders with experience in African markets to ensure the cables were transported safely and timely to Angola and Djibouti. We carefully packaged the cables in moisture-proof and shock-proof packaging to prevent damage during transportation, especially given the long-distance sea and land transportation routes. We also provided real-time logistics tracking information to the client, allowing them to monitor the delivery progress and plan their construction schedule accordingly. Despite the complex cross-border logistics and potential delays, we successfully delivered all cables on time, ensuring the project’s construction progress was not disrupted.

In addition, our technical team provided remote technical support to the client’s installation team, answering questions about cable installation, bending radius (6D for H1Z2Z2-K Solar Cable and HO7ZZ-F Cable), and maintenance. This support helped the client complete the cable installation efficiently and correctly, reducing the risk of installation-related issues.

5. Stable Operation and Client Satisfaction

Since the solar power plants in Angola and Djibouti were put into operation, the cables supplied by Dongguan Greater Wire & Cable Co., Ltd. have performed stably, with no quality issues reported. The H1Z2Z2-K Solar Cable has withstood the harsh desert conditions in Djibouti, showing no signs of insulation aging or sheath cracking after months of exposure to intense UV radiation and extreme temperatures. The PVO7AC-F Cable, including the 3×2.5 mm PVO7AC-F Cable, has ensured stable AC power transmission, with minimal energy loss and no short-circuit risks. The HO7ZZ-F Cable has reliably supported the plant’s auxiliary systems, ensuring smooth operation of control and monitoring equipment.

The client’s project team was highly satisfied with our products and services. They noted that our cables not only met all technical and compliance requirements but also reduced their long-term maintenance costs—thanks to the 25-year service life and high durability of the cables. The successful completion of this project has helped the client enhance their reputation in the African renewable energy market, and they have expressed their willingness to cooperate with us on future solar power projects in Angola, Djibouti, and other African countries.

6. Cooperation Value and Client Feedback

This cooperation was more than just a cable supply contract—it was a partnership built on trust, professionalism, and mutual benefit. For the client, we solved their core pain points: compliance with international standards, durability in harsh environments, timely delivery, and technical support. Our IEC-certified cables ensured the project’s safety and compliance, while our experience in solar projects allowed us to provide tailored solutions that met their specific needs. The stable performance of our cables has also helped the client reduce operational and maintenance costs over the long term.

The client summarized their experience working with us as “reliable, professional, and customer-centric.” They emphasized that our ability to understand their project requirements, provide high-quality certified products, and deliver on time was crucial to the project’s success. They also noted that our technical support helped them avoid potential installation and operational issues, saving them time and resources.

7. Partner with Us for Your Solar Cable Needs

If you are undertaking solar power projects in Angola, Djibouti, or any other country, and need high-quality, IEC-certified cables that can withstand harsh conditions, Dongguan Greater Wire & Cable Co., Ltd. is your ideal partner. We have rich experience in supplying cables for large-scale solar power projects, with a proven track record of delivering reliable products and professional services.

Our H1Z2Z2-K Solar Cable, PVO7AC-F Cable, HO7ZZ-F Cable, and other solar cables are all IEC-certified, with customized specifications to meet your project’s unique needs. We ensure timely delivery, strict quality control, and comprehensive technical support to help you complete your project smoothly and efficiently.

Contact us today to discuss your cable requirements and get a customized quote. We look forward to partnering with you to drive the development of renewable energy and achieve mutual success!

Dongguan Greater Wire & Cable Co., Ltd.

Tel/WhatsApp/WeChat: +86 135 1078 4550 / +86 136 6257 9592

Email: manager01@greaterwire.com