DC 500V/600V/1000V/1200V/1500V

Solar Surge Protector DC SPD Manufacturer in China

Residential & On-grid Systems

DC 400 V

Residential & Off-grid Systems

DC 500 V

Commercial PV & Energy Storage

DC 900 V

Utility-scale Solar Farms

DC 1400 V

Our Surge Protector Series

As a leading SPD manufacturer, we provide comprehensive DC surge protection solutions, delivering reliable safeguards for photovoltaic systems, energy storage, and various DC applications.

DC SPD for PV

DC SPD for PV Solar

AC SPD for Solar

Who we are?

SOWER- Your Trusted DC Surge Protector Manufacturer

Reliable Surge Protection for Every DC System

SOWER specializes in PV surge protection for over 12 years, SOWER delivers professional DC solutions with unmatched reliability. Our expertise and dedication to quality make our 1000V DC surge protectors the trusted choice for solar applications worldwide.

Profissional

Our 12+ year track record, coupled with ISO 9001 standardized production, ensures we deliver DC SPDs of exceptional quality and efficiency.

Reliable Quality

Our rigorous quality testing and premium components, including high-grade MOVs, ensure reliable protection and lasting performance.

Serviço

Every SOWER product comes with a 3-year warranty protection, underlining our promise of quality and reliable after-sales service.

Delivery

We ensure rapid delivery of our DC SPDs with an outstanding 96% on-time rate. Standard products ship within 15 days, and customized solutions are completed in just 30 days.

DC & PV Surge Protection

Reliable DC Surge Protector Performance with Maximum Precision and Durability

Moisture-Resistant Sealing

Our DC SPD incorporates hermetically sealed MOVs that have been validated through rigorous 85°C/85% RH testing, ensuring resistance to moisture and dust for reliable outdoor operation.

Dual-Waveform Protection

Our surge protective devices, verified through dual waveform testing (10/350 μs and 8/20 μs), demonstrate superior performance in both lightning and surge protection, establishing a complete safety barrier for electrical systems.

UL 94 V-0 Rated Enclosure

The enclosure utilizes PA6 with 30% glass fiber reinforcement, delivering exceptional mechanical and thermal performance. Extensive glow-wire testing confirms the housing maintains structural integrity under extreme conditions while eliminating fire propagation risks.

45% Better Performance

Our SPD features enhanced metal contacts (8 mm × 0.8 mm). This robust design effectively reduces resistance and heat generation, while successfully managing the sustained thermal stress in DC systems for reliable long-term protection.

25% Lower Fire Risk

Our proprietary safety core technology is specifically engineered to prevent thermal runaway caused by DC arcing—the primary fire hazard—demonstrating measurable reduction in catastrophic thermal incidents compared to conventional solutions.

Testing & Quality Assurance

Each SPD undergoes strict multi-level testing, including glow wire, impulse, transient overvoltage (TOV), thermal stability, salt spray, and three-parameter evaluations.

Three-Parameter Test

Measures the varistor voltage, leakage current, and non-linear coefficient.

Impact Test

Ensures that the surge protection devices meet relevant standards e regulations.

Transient Overvoltage Test

Verifies SPD’s ability to handle voltage spikes while maintaining insulation and protection. TOV testing helps manufacturers improve product safety and system stability.

Glow Wire Test

Verifies SPD’s heat resistance without fire or smoke hazards, maintaining its structure and function. Proper glow wire testing helps manufacturers ensure safety and compliance.

Thermal Stability Test

Evaluates SPD performance under high temperatures, ensuring insulation and function. This helps manufacturers improve product safety and reliability.

48-hour Salt Spray Test

Evaluates SPD’s corrosion resistance e durability against salt mist exposure. This helps manufacturers ensure product reliability and quality.

Temperature and Humidity Test

Evaluates SPD reliability under varied conditions, serving as a key quality inspection step.

Certificates

TUV, CB and CE certification. Surge Protective Devices (SPD) tested accroding to IEC/EN 61643-11 and IEC/EN 61643-31.

Reviews From Customers

We believe the best marketing is a satisfied client. These screenshots capture real interactions with procurement managers and engineers worldwide. No scripts, just genuine feedback on our product quality and manufacturing speed. Real proof that we deliver on our promises.

Celebrating Partnerships and Shared Success.

Behind every photo lies a story of growth. We cherish every meeting with our partners. Looking back at past exhibitions and visits, we thank you for choosing us. We look forward to seeing you in our next picture.

Our Factory Insight

We understand that in the PV industry, time is money. That’s why we invest heavily in both manufacturing technology and stock management. The photos below highlight our well-stocked warehouse and efficient production lines, standing ready to dispatch your order at a moment’s notice.

Successful Projects

Trusted global partner delivering reliable solar protection solutions across three continents since 2014.

Kenya

Successfully protected 50MW solar farm in Kenya, providing reliable power solutions for local communities.

Vietnam

Delivering comprehensive lightning protection for VietSun's industrial rooftop solar projects across Vietnam's manufacturing zones.

Philippines

Protecting island solar installations against extreme weather, ensuring stable power supply for communities.

Brazil

Our advanced protection systems secure Brazil's largest solar farms from Amazon to Atlantic coast.

Indonesia

Serving Indonesia's diverse solar projects across multiple islands with customized lightning protection systems.

South Africa

Partnering with SA Mining Solar to power sustainable mining operations through innovative protection solutions.

Get Samples Now!

Hello! We’re Here to Help
Let’s find the perfect SPD solution for your project.

Custom SPD Solution With Easy

At SOWER, We turn complex Into Simple! Follow the following 3 steps to start today!

1. Tell Us What You Need

Tell us as specific as possible of your needs, provide the drawing, reference picture and share your idea.

2. Get Solution & Quote

We will work on the best solution according to your requirements and drawing, the specific quote will be provided within 24 hours.

3. Approve for Mass Production

We will start mass production after getting your approval and deposit, and we will handle the shipment.