Nigeria Tunga Hybrid Solar Mini Grid Project

When the small industrial park in Tunga, Nigeria was still plagued by frequent power outages and high diesel costs, Our team successfully broke the deadlock for the local 300kWp hybrid solar mini grid project with a set of customized photovoltaic wire solutions in 2025. It not only achieved 24/7 stable power supply but also reduced the customer's operating costs by 60%. This is not a simple wire export delivery, but a practical journey where we deeply understood the pain points of Nigeria's photovoltaic market and empowered the project landing with product strength. It has also become a typical model for Chinese wire export enterprises to adapt to the African mini grid market, demonstrating our professional accumulation and practical capabilities in the wire export field.

I. Deep Dive into Nigeria's Market: Core Opportunities for Wire Export Amid Pain Points

Before undertaking the Tunga project, we conducted an in-depth investigation into Nigeria's photovoltaic market and found that behind the local power predicament lies enormous opportunities for wire exports. As Africa's largest economy, Nigeria has prominent shortcomings in its power structure: the national power grid has been unstable all year round, with frequent failures over the past decade. In some areas, the reliable daily power supply is less than 6 hours, and there were even two full-grid collapses in early 2026. Industrial and commercial enterprises are forced to rely on diesel power generation, and the diesel cost of 0.35 US dollars/kWh has burdened many enterprises.

Compared with the residential photovoltaic market, the demand for industrial and commercial photovoltaics in the local area is more urgent. Especially in scenarios such as industrial parks, hospitals, and schools, there is a stronger willingness to solve "power outage losses" through mini-grid/off-grid systems. This means that high-quality wires adapted to the local environment and meeting international standards have become the key to the landing of such projects. The customer of this cooperation is a local enterprise deeply engaged in the new energy field. The Tunga 300kWp mini grid project it undertakes aims to provide stable and economical power supply for the surrounding industrial parks and communities. However, a series of pain points made it difficult for them to choose a wire supplier during the project advancement.

The customer's core troubles are specific: frequent power outages and severe voltage drop require wires that can adapt to stable transmission of multi-energy switching; the high-temperature, high-humidity, and strong ultraviolet climate makes ordinary wires prone to aging and damage, and their service life is difficult to guarantee; the technical level of local construction teams is limited, and complex wiring is not only inefficient but also prone to potential safety hazards; at the same time, the project must meet international standards, and the wires must have authoritative certifications, otherwise, they cannot be put into operation in compliance. After multiple screenings, we became the customer's final choice with our authoritative certifications, customization capabilities, and fast delivery advantages - our solution precisely hits every pain point.

II. PV Wires as the Core, Full Set of Wires Precisely Adapted

Focusing on the actual scenario of the Tunga 300kWp mini grid project, we provide a full set of wire solutions with PV wires as the core, covering the full-link transmission needs of the photovoltaic system and adapting to the local high-temperature, high-humidity, and strong ultraviolet environment; among them, the PV wires hold the TUV EN 50618 certification (Certificate No. B 126326 0001 Rev.00), and other supporting wires have national standard TÜV and IEC 62930 certifications, ensuring compliance; the products adopt 99.99% high-purity oxygen-free copper conductors and XLPO/XLPE insulation layers, with a working temperature range of -40℃ to 125℃ and a service life of 25 years, featuring low loss and adaptability to local construction. Precise selection is made for each link: 4mm² and 6mm² H1Z2Z2K PV wires are used from PV modules to combiner boxes; 16mm² and 25mm² copper core DC cables are used from combiner boxes to controllers; 35mm² to 50mm² cables are used from controllers to DC busbars; 50mm² to 70mm² flexible copper cables are used for energy storage battery connection; 70mm² to 95mm² cables are used from batteries to busbars; YJV 3×35mm², 3×50mm² or 4×70mm² cables are used for inverter AC output; 3×10mm², 3×16mm², 3×25mm² YJV cables are used for power distribution to loads; 16mm² or 25mm² bare copper wires are used for grounding; 1.5mm² RVV or shielded twisted pair cables are used for control and communication, with prominent core advantages and strong adaptability.

III. Customized Solutions to Solve Project Pain Points One by One

We deeply understand that simple product supply cannot meet customer needs. Only the integrated service of "products + solutions" can truly solve the core troubles of the Tunga project. To this end, we set up a professional technical team to deeply connect with customer needs, formulate targeted solutions based on the actual project scenario, and follow up the project advancement throughout the process to ensure that every pain point is accurately solved.

To address the core pain point of frequent power outages and severe voltage drop, we took the full set of low-loss wires as the foundation, matched with a photovoltaic-energy storage-diesel three-source hybrid architecture, and realized automatic energy switching and load priority control through the energy management system - giving priority to photovoltaic energy, using photovoltaic power generation to meet load demand during the day, and at the same time, peak shaving and energy storage through the energy storage system, and releasing stored energy at night to replace diesel power generation. Diesel is only used as an emergency backup energy source, completely realizing 24/7 uninterrupted power supply, solving the production losses caused by power outages in the industrial park, and ensuring the normal living electricity consumption of community residents. Compared with ordinary wires, our low-loss copper core cables can reduce waste during energy transmission, maximize the utilization rate of photovoltaic energy, and further amplify the advantages of the multi-source hybrid architecture.

Faced with the problem of high diesel costs, our solution forms a "double cost reduction" effect: on the one hand, by optimizing wire specifications and adopting low-loss copper core design, we reduce energy transmission losses, improve the actual utilization rate of photovoltaic power, and help customers increase the proportion of photovoltaic power generation; on the other hand, with sufficient energy storage capacity, we store energy during the day and discharge at night, greatly reducing diesel usage. Finally, we help customers reduce electricity costs by 60%, which is also the key reason why customers choose us - our wires are not only transmission carriers but also core helpers for customers to control operating costs. Compared with ordinary wires on the market, our low-loss advantage can bring long-term benefits to customers.

In response to Nigeria's harsh environment of high temperature, high humidity, and strong ultraviolet rays, our wire products themselves have inherent advantages, which are further optimized in details according to the project scenario: the XLPO/XLPE insulation layer can effectively resist high temperature, humidity, and ultraviolet erosion, avoiding short-circuit faults caused by aging and damage of the insulation layer of ordinary wires; the high-purity copper core conductor not only has high conductivity but also can adapt to temperature changes, avoiding poor contact caused by thermal expansion and contraction. With a service life of 25 years, it greatly reduces the frequency of wire replacement and maintenance costs, completely solving the customer's concern about "wire durability". This is also the core difference between our products and ordinary wires - we do not pursue universal adaptation, but accurately fit the local environment, reducing the risk of faults from the source.

Considering the limited technical level of local construction teams, on the basis of providing standardized prefabricated wires, we further optimized the wiring scheme: each section of wire is prefabricated in advance according to the project drawings with clear marks, and only modular docking is needed on site to complete the installation, which greatly reduces the number of on-site contacts, not only reducing the risk of manual wiring errors but also improving construction efficiency. At the same time, our technical team provides remote construction guidance, helping local construction personnel quickly master wiring skills through videos, pictures, and texts, solving the customer's trouble of "difficult construction and easy errors", and ensuring the smooth progress of project construction.

To address the pain points of difficult maintenance and lack of resources, our solution focuses on both "fault prevention" and "easy maintenance": on the one hand, we select high-reliability large-section cables, combined with strict factory inspection, to reduce the failure rate of the wires themselves; on the other hand, through 1.5mm² RVV or shielded twisted pair cables, we ensure the stable transmission of signals of the remote monitoring system, and design a partitioned independent control system, allowing customers to quickly locate fault locations through remote terminals without the need for professional on-site inspection, greatly shortening maintenance time and reducing maintenance costs, and solving the problem of insufficient local maintenance resources.

IV. Double Guarantees to Ensure the Project Lands on Time

The Tunga project is related to the production of the industrial park and the electricity safety of community residents, so safety guarantee is the top priority. We have established a full-process safety control system from product production to on-site installation: in the production link, we strictly select high-quality raw materials, follow international production standards, and each batch of wires undergoes multi-dimensional inspections such as insulation performance, conductivity, and weather resistance to ensure qualified quality; in the installation link, our technical team provides remote guidance, focusing on standardizing the wiring process and grounding operation, ensuring the standardized installation of the grounding system (16mm² or 25mm² bare copper wires), and avoiding potential safety hazards such as electric leakage and short circuits; the products themselves have good flame retardant and anti-leakage performance, which cooperate with the photovoltaic energy storage system to further improve the safety of project operation, so that customers do not have to worry about electricity safety issues.

The customer clearly required the project to be put into operation by the end of 2025, with a very tight delivery cycle. After receiving the order, we immediately launched an expedited production plan. Relying on the mature domestic production system, we prioritized the allocation of raw materials and completed the production of all wires in only 25 days; at the same time, we docked with international logistics channels in advance, optimized the logistics plan, avoided logistics congestion nodes, and safely delivered the products to the Nigeria Tunga project site in only 12 days, 3 days ahead of the agreed delivery time, gaining sufficient time for on-site construction and ensuring the project progresses on schedule and is put into operation as scheduled. We won the customer's recognition with efficient delivery. After delivery, we continue to provide after-sales support, regularly track the operation status of the products, and respond to the customer's maintenance needs in a timely manner, so that customers have no worries.

V. Project Achievements: Achieving Win-Win Results for All Parties

At the end of December 2025, the Nigeria Tunga 300kWp hybrid solar mini grid project was successfully put into operation. After more than 3 months of stable trial operation, all indicators of the project have met the design standards, and the customer's core goals have been successfully achieved. During the project operation, the wires we provided had no faults, the energy transmission was stable and efficient, the utilization rate of the photovoltaic system was greatly improved, the diesel usage was reduced by 60% compared with before, the customer's operating costs were significantly reduced, and they completely got rid of the dependence on diesel power generation and solved the problem of frequent power outages.

For the local industrial park, 24/7 stable power supply increased production efficiency by 30%, completely eliminating order losses caused by power outages; for the surrounding community residents, stable power supply improved the quality of life, which was highly recognized by local residents and the government. The successful landing of this project not only brought significant economic and social benefits to the customer but also established our position in the Nigeria photovoltaic mini grid wire export market, becoming a benchmark case for Chinese wire exports to adapt to the African market, and accumulating valuable practical experience for the subsequent expansion of the West African photovoltaic market.

VI. Empowering with Strength, Gaining Long-Term Trust

In this cooperation with Nigerian customers, we have always adhered to the principle of "taking the project as the core and pain points as the orientation". We not only provided high-quality wire products but also helped customers solve all problems in the project advancement through customized solutions and professional services, achieving the multiple goals of "cost reduction, efficiency improvement, stability, and safety". The customer highly recognized our products and services, believing that our wires have strong adaptability, reliable quality, complete certifications, and efficient delivery. Especially the customized solutions accurately fit the local scenario and solved the pain points they care about most. Compared with other suppliers, our services are more targeted and professional.

This cooperation also let the customer see our strength, and both parties have reached a long-term cooperation intention. They will work together to expand more photovoltaic mini grid projects in Nigeria to achieve mutual benefit and win-win results. We also deeply realize that the core needs of the African photovoltaic market are "adaptability" and "reliability", and our advantage is that we can accurately grasp market pain points and provide customers with one-stop wire export solutions with authoritative certifications, high-quality products, and customized solutions.

VII. Invitation to Cooperate for Win-Win

Nigeria's photovoltaic market is in a stage of explosive growth, with a surge in demand for mini-grid/off-grid systems. The pain points of unstable power grid and high diesel costs provide broad market space for Chinese wire export enterprises. As a professional wire export enterprise, Dongguan GERITEL Electrical Co., Ltd. is deeply engaged in the field of photovoltaic wires, with authoritative product certifications, mature customized solutions, fast delivery capabilities, and professional after-sales services. Especially in African markets such as Nigeria, it has rich practical experience and can accurately adapt to the local environment and project needs.

If you are also undertaking photovoltaic mini grid, ground photovoltaic and other projects in Nigeria or West Africa, facing difficulties such as wire selection, compliance certification, environmental adaptation, and construction maintenance, do not hesitate to contact us. We will tailor the most suitable wire solution for you, and help your project land smoothly with authoritative certifications, excellent quality, and efficient services, so as to seize the opportunities of the African photovoltaic market and achieve mutual benefit and win-win results together!

Contact Information:

Dongguan GERITEL Electrical Co., Ltd.

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

Email: manager01@greaterwire.com