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DC SPD (Surge Protective Device) for
Solar PV & ESS
Reliable surge protection up to 1500V DC
safeguard your inverters, batteries, and monitoring devices from costly damage.
- Certified to IEC 61643 & UL 1449
- Optimized for Solar PV, ESS, and industrial DC networks
- Proven reliability for rooftop to utility-scale systems
Explore Our DC SPD Range
Engineered surge protection solutions for industrial DC systems and renewable energy applications up to 1500V.
Technical Highlights
Engineered Protection for 1000V & 1500V DC Systems
In high-voltage DC environments, a well-matched DC SPD diverts surge energy and stabilizes your PV/ESS assets. Each point below is structured as a concise card for easy reading.
Reliable Defense for High-Voltage DC
Transient surges from lightning or switching can damage inverters, batteries and monitoring devices. A solar PV surge protective device withstands continuous DC bias and safely routes energy to ground.
For coordinated protection, SPDs should work with over-current devices—see DC Fuse protection in PV arrays.
Advanced Protection Topology
LYD2 series adopts fast-response MOV / hybrid designs to achieve high discharge capacity with low let-through voltage. Designs align with IEC 61643-31 for DC circuits (IEC official site).
Purpose-Built for Solar PV & ESS
- 1000V DC SPD — suited to rooftop & commercial PV.
- 1500V DC SPD — tailored for utility-scale PV and large ESS buses.
- Compact footprint fits string combiner boxes and inverter DC inputs.
Proper surge protection reduces outages and extends asset life, lowering project LCOE.
Maintenance-Friendly Operation
- Visual status indicators for quick on-site checks.
- Optional remote signaling contacts for SCADA/BMS.
- Hot-swappable modules simplify replacement without full array shutdown.
Need tailored coordination? Explore our capabilities as a DC SPD manufacturer.
Business Value
Reduce Downtime, Protect ROI, and Stabilize LCOE
Deploying a well‑matched DC SPD for 1000V/1500V systems cuts unplanned outages and shields high‑value assets (PV inverters, ESS batteries, monitoring electronics). Fewer failures mean fewer truck rolls, faster recovery, and a healthier project IRR over the full asset life.
Lower O&M Cost
Hot‑swappable modules and visual status windows streamline maintenance; optional remote signaling reduces site visits.
Higher System Uptime
Effective clamping on PV arrays and ESS DC buses minimizes component stress and prevents cascade failures.
Bankable Performance
Coordinated surge strategy with DC fuse protection supports stable yields and predictable cashflows.
- Designed for utility‑scale solar farms, commercial rooftops, and high‑voltage ESS cabinets.
- Fits into string combiner boxes and inverter DC inputs without layout compromises.
- Supports long‑term asset reliability, contributing to competitive LCOE targets.
Why DC Surge Protective Devices Are Critical in Modern Renewable Energy Systems
In renewable energy and industrial applications, DC surge protective devices (DC SPDs) play a vital role in preventing damage from lightning strikes and transient overvoltage. Whether it’s a 1000V DC SPD for solar PV systems or a 1500V DC surge protective device for energy storage, proper surge protection ensures system reliability, minimizes downtime, and reduces costly maintenance.
Compared to conventional AC protection, solar PV surge protective devices are designed for continuous DC environments with higher endurance and strict IEC 61643 standards. For large-scale battery cabinets and EV fast-charging stations, selecting the right SPD directly impacts system safety and long-term ROI.
If you’re exploring integration with our DC Fuse solutions , or need expert advice for complex renewable projects, our engineering team is ready to support. To learn more about compliance, you may also check the official IEC surge protection standards .
Design & Deployment Checklist for 1000V / 1500V DC SPDs
Practical guidance for engineers: select, install, and monitor DC SPDs in solar PV, ESS and industrial DC systems. Reference: IEC 61643-31.
Selection & Coordination
Match SPD ratings to your DC bus and site risk; coordinate with upstream protection.
- Choose Type 2 for PV/ESS; consider 1+2 in high-lightning regions.
- MCOV ≥ system voltage; verify In/Imax and target low Up/VPR.
- Coordinate with DC fuse protection and inverter limits.
Installation & Wiring
Good wiring is as important as the device itself.
- Total lead length (line+earth) as short as possible, typically < 0.5 m.
- Use common reference earthing; minimize loop area and impedance.
- Mount near string combiner boxes / inverter DC inputs; keep ventilation clear.
Monitoring & Documentation
Plan for predictable end-of-life and audit-ready records.
- Use visual status windows; add remote signaling to SCADA/BMS if critical.
- Keep datasheets, test reports and installation records per IEC practices.
- For project help, contact our engineers via Contact Us.
Compliance & Long-Term Reliability
Our 1000V / 1500V DC SPDs are designed in accordance with IEC 61643-31 and other international safety standards, ensuring consistent performance across solar PV, ESS, and industrial DC applications.
Beyond surge suppression, predictable end-of-life management is critical. Visual status indicators and remote signaling options support preventive maintenance and reduce downtime, improving overall system reliability.
For project documentation, our engineers provide test reports, datasheets, and compliance records to support smooth certification and audit processes. In addition, certifications such as UL, TÜV, and CE are available to meet international procurement and insurance requirements.
By selecting certified and fully compliant surge protective devices, you ensure not only safety and reliability, but also maximize ROI, reduce long-term operational risks, and meet global quality standards for solar power plants, energy storage systems, and DC distribution networks.
Factory-Tested Quality & Supply Assurance
Every DC SPD is qualified through in-house surge and environmental testing, with full batch traceability and predictable delivery. Built for utility-scale 1000V / 1500V PV and ESS projects.
Surge & Environmental Testing
- Type-test alignment to project specs (In / Imax, Up/VPR, TOV).
- Routine verification on MOV/GDT modules and thermal disconnectors.
- Temperature/humidity cycling and long-duration burn-in for reliability.
- Project files kept for audit and repeat orders.
Production Control & Traceability
- Lot-based serial tracking from module to finished SPD.
- Material incoming inspection with acceptance records.
- 100% functional check (status window / remote contacts where applicable).
- Documentation pack: datasheet, test report, CoC on request.
Delivery & Engineering Support
- Standard lead time for stocked ratings; expedited build for project BOMs.
- OEM branding and label files for EPC and panel builders.
- Coordination notes for upstream/downstream devices in PV/ESS cabinets.
- Dedicated engineer contact for sample and production ramp-up（talk to engineering）.
Lead Time2–4 weeks (typ.)
MOQProject-friendly
Warranty24 months
DocumentationDatasheet / Test Report / CoC
DC SPD Wiring & Connection Diagram
Below are the standard wiring diagrams for DC surge protective devices (SPD) used in solar PV systems and energy storage systems. Available in 1000V and 1500V configurations.
1000V DC SPD Wiring Diagram
1500V DC SPD Wiring Diagram
Frequently Asked Questions about DC SPD
A DC Surge Protective Device (SPD) protects solar PV and energy storage systems from voltage spikes caused by lightning or grid disturbances. It helps ensure system safety, prevents damage, and extends the lifespan of inverters and modules.
The 1000V DC SPD is typically used in small to medium PV systems, while the 1500V DC SPD is designed for large-scale utility projects. The selection depends on the DC system voltage of your installation.
Installation requires parallel connection to the DC circuit, with proper grounding. Always follow the wiring diagram provided and comply with IEC/EN standards. It is recommended to have installation performed by a qualified electrician.
SPDs have finite life cycles and should be inspected regularly. Most models feature visual indicators to show health status. Replacement is necessary if the SPD shows a fault indicator or after severe lightning events.
Yes, our DC SPDs are manufactured according to IEC 61643-31 and EN 50539-11 standards, ensuring compatibility with global PV and energy storage applications.
Yes. By preventing transient overvoltages, SPDs safeguard sensitive components such as inverters, combiner boxes, and batteries. This significantly improves system uptime and reduces maintenance costs.
Minimal maintenance is required. Regular inspection of status indicators and proper grounding checks are sufficient to ensure long-term protection performance.
You can purchase directly from us, a professional DC SPD manufacturer and supplier. For more details, please visit our Contact Us page.
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