Built to withstand the severe diurnal fluctuations and harsh sandy environments of the Namib Desert.
Foshan SDEV Charger Co., Ltd. is a trusted manufacturer of protective components for photovoltaic systems across the globe. Our experience of working in the electrical industry for more than 30 years allows us to create solar DC components that comply with the latest DC standards. Through our focus on solar DC protection design, production, and marketing, we can bring brand-building PV protection solutions.
With the inheritance of 30+ years of experience in the research and production of DC protection products, we are continuously dedicated to the EV charging field. In recent years, SDEV has attentively invested resources in research on EV-related products, successively manufacturing other types of products, thus reaping wide market popularity across the world.
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Harnessing high GHI (Global Horizontal Irradiation) while mitigating the thermal and physical challenges of the Southern African power grids.
Namibia is rapidly scaling its solar infrastructure to achieve energy self-sufficiency and reduce its reliance on importing power from the Southern African Power Pool (SAPP). With an average of over 300 sunny days per year and global horizontal irradiation values exceeding 2,200 kWh/m² annually in regions such as Karibib, Hardap, and Erongo, the territory presents one of the highest solar power potentials globally. However, this solar abundance comes with unique operational risks that require highly specialized protection gear, particularly PV system disconnect switches.
Industrial operations, especially in remote mining zones (such as Swakopmund's uranium mines and Rosh Pinah's zinc facilities), rely on hybrid solar-diesel mini-grids to stabilize power grids. In these settings, unexpected switch failure due to sand ingress, high ambient thermal levels, or tracking system malfunctions can trigger catastrophic arc flashes. As a leading manufacturer serving Namibia, we design robust electrical disconnects rated to sustain stable operations up to 1500V DC under continuous high-temperature exposure, ensuring maximum uptime and safety compliance with localized Southern African SANS 10142-1 standards.
Namibian solar installations suffer extreme diurnal thermal cycling. Our DC disconnect enclosures are built using advanced UV-stabilized polycarbonates that maintain mechanical strength even under continuous UV radiation levels reaching index 11+.
Fine sand particles from the Namib and Kalahari deserts easily breach standard enclosures. Our IP65/IP66 disconnect boxes feature double-ridge gaskets that completely seal contacts from conductive sand and dust intrusion.
High voltage DC circuits do not have a natural zero-crossing point. Our DC isolators feature patented magnetic blowouts and knife-edge contacts that suppress arcs in less than 3 milliseconds, avoiding localized fires.
Quality is the primary goal among each of our workshops since this leads to the best performance and safety for any Solar, Storage, and EV charging system. Our commitment to quality increases brand awareness for your company. To achieve our goal, our factory and products comply with UL, SAA, CB, CE, TUV, ISO, and RoHS standards.
Achieving our goals comes from formulating new products based on the market demands through our in-house R&D team. Our efforts have led to our first UL508i listed patented DC switch within China and the DC-PV2 DC switch produced for the global market. With our cutting-edge PV protective products and EV chargers, we aim to create long-term partnerships with utility companies and developers.
Request Certification ReportsEnsuring stable deliveries, cost-effective pricing, and state-of-the-art materials engineering for projects in Windhoek, Walvis Bay, and beyond.
China is the global hub for photovoltaic component research. Our manufacturing facility in Foshan integrates raw material selection, high-precision automated tooling, and optical testing to maintain consistent component tolerances. Our dedicated R&D lab continually tests contacts and mechanisms under simulate desert sandstorms and thermal overloads, which directly informs our customized configurations for African electrical distributors.
By bypassing multiple middle tiers, we pass on substantial cost efficiencies directly to utility contractors and commercial solar integrators in Namibia. SDEV provides turnkey OEM/ODM services, ensuring custom markings, configurations, and terminal wiring sizes conform exactly to local utility requirements (like NamPower, Erongo RED, and CENORED).
Select the exact current, voltage, and pole configurations for your commercial, industrial, or residential projects.
Crucial engineering considerations: Thermal derating, switching speeds, and arc suppression parameters.
A classic failure point in Sub-Saharan African PV design is using standard indoor-rated DC isolators under direct outdoor exposure. Ambient temperatures in summer inside enclosure boxes exposed to Namibian sun can easily reach 60°C to 70°C. SDEV's DC switches utilize premium high-conductivity copper and silver-plated contact materials that lower internal resistance, shifting the thermal derating limit. While typical switches experience a 30% capacity drop at 50°C, SDEV units maintain up to 90% of their nominal current capacity at elevated operating temperatures, preventing premature thermal trips.
In AC circuits, the voltage zero-crossing occurs 100 or 120 times per second, extinguishing arcs naturally. In high-voltage DC solar systems (up to 1500V DC), the current flow is continuous, meaning any physical detachment of contacts will draw a long, dangerous arc. If not extinguished within milliseconds, this arc will melt the polymer enclosure and create an active fire hazard. SDEV disconnects integrate localized permanent magnetic fields (magnetic blowouts) that stretch and guide the arc into arc-chutes where it is quickly split and extinguished.
Coastal Namibian projects (near Walvis Bay and Swakopmund) experience a combination of corrosive salt-laden moisture from the Atlantic Ocean and blowing desert sands. Standard zinc-plated mounting hardware and plastic components degrade rapidly under these conditions. SDEV's specialized heavy-duty disconnects feature IP66 enclosures, stainless steel grade 316 latching hardware, and UV-resistant polycarbonates that prevent embrittlement and ingress over a design lifespan of 25 years.
How utility-scale developers and procurement managers optimize sourcing for large-scale solar programs.
Global financial institutions funding utility projects in Africa require all DC switchgear to be fully certified under the IEC 60947-3 standard (specifically for DC-PV1 and DC-PV2 utilization categories). SDEV products carry verified TUV, CE, and CB certs.
Modern developers require custom multi-pole switches to isolate multiple MPPT strings simultaneously. Our engineering team provides custom configurations including 2-pole, 4-pole, and specialized multi-input combiners designed to minimize wiring steps.
With tightening safety regulations, automated safety switches that isolate the array when the local AC grid fails are becoming the default standard. Our Firefighter Safety Switch series automatically trips when AC power is cut, protecting emergency personnel.
Find quick answers to common engineering, logistics, and compliance questions.
Get in touch directly with SDEV's technical support engineers. We can customize pole structures, IP enclosure materials, and lock mechanism configurations to align perfectly with your project requirements.
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