ZJBENY is a trusted manufacturer of protective components for photovoltaic systems across the globe. Through our focus on solar DC protection design, production, and marketing, we can bring brand-building PV protection solutions.
In recent years, ZJBENY 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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Why Choose Us?
Rich Experience
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. 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.
Broad Market
ZJBENY has attentively invested resources in research on EV-related products, successively manufacturing other types of products, thus reaping wide market popularity across the world.
Wide Product Range
ZJBENY offers a full range of solar PV protection products and EV chargers for different solar PV, battery energy storage, and EV charging system. Our Main Product Lines: EV Charger, Rapid Shutdown Device, Microinverter, PV Combiner Box, DC Isolator Switch, DC Circuit Breaker, DC Fuse Holder, DC Contactor, AC Components, etc.
Leading Service
We independently complete the R&D, production, marketing, sales, and technical support processes. We satisfy your needs with our long warranty, technical support, and other value-added services.

A DC Protector installed at or within equipment such as DC servo mechanisms, fire alarm monitoring systems, security system controls, etc. provides compact, heavy-duty surge suppression. Senses when an overvoltage is occurring and switches from an "open" to a virtual "short" circuit.
Advantages of DC Surge Protector
When your solar PV system is properly protected against voltage surges, you can expect improved overall performance. This is because the risk of damage to sensitive components is reduced, allowing the system to operate at optimal levels.
There are minimal disruptions and more consistent power output, which leads to better system efficiency and higher ROI. This is important when it comes to solar farms that must maintain high levels of productivity to be profitable.
Solar surge protection devices are also important in smaller solar power systems too, which must power a facility and do so reliably.
As we mentioned earlier, voltage surges can damage or destroy sensitive electronic components in your PV power system. This is not only costly in terms of repairs and replacements, but it can also pose a safety hazard.
In addition to protecting the solar system components such as inverters and solar panels, solar SPD devices guard electrical equipment in a power system including TVs, computers, home appliances, and office equipment.
By using surge protection devices for PV system protection, you can help to ensure the safety of your equipment and avoid the possibility of electrical fires. This is a major requirement in PV systems that are located in areas with severe weather conditions.
Another big SPD benefit is that the devices help to prolong the lifespan of your equipment. Solar panels are designed to withstand a certain level of voltage, but anything beyond that could cause damage.
A sudden spike in voltage – known as a transient voltage – can come from several sources, including lightning strikes, power outages, and faulty wiring.
When that happens, the electrical current can overload and damage sensitive components within your solar panels. This not only reduces the efficiency of your system but also decreases its lifespan. By using an SPD device, you can protect your equipment from transients and extend its lifespan.
Another benefit of surge protection device use is money savings. While the initial cost of investing in SPDs may seem high, it's important to remember that they offer long-term cost savings. This is because they help to prevent damage caused by transients, which can be expensive to repair.
In most cases, the damage caused by a single transient event costs more than the SPD itself.
In the long run, using SPDs can save you money. This is because they help to prevent damage caused by transients, which can be expensive to repair.
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Features of DC Surge Protector
Nominal Voltage (Un)
The nominal voltage stands for the nominal voltage of the system to be protected
Maximum Continuous Operating Voltage (Uc)
The maximum continuous operating voltage is the r.m.s value of the maximum voltage which may be connected to corresponding terminals of the Surge Protective Device during operations.
Maximum Continuous Operating Voltage for PV System (Ucpv)
The maximum continuous operating voltage for Photovoltaic (PC) system is the value of the maximum DC voltage which may be permanently applied to terminals of SPD.
Voltage Protection Level (Up)
The Voltage Protection Level is the maximum instantaneous value of the voltage at terminals of SPD.
Nominal Discharge Current (In)
The nominal discharge current is the peak value of the current that can be passed through SPD having a wave shape of 8/20 µs.
Maximum Discharge Current (Imax)
The maximum discharge current is the peak value of the current which the device can safely discharge through the SPD having a wave shape of 8/20 µs.
Types of DC Surge Protector

Type1
Type 1 SPDs have a 10/350 s current wave and protect against direct lightning strikes. In central inverters, Type 1 SPDs are employed.

Type2
Type 2 SPDs protect indirect lightning strikes with waveforms of 8/20 seconds. An 8/20 s waveform denotes a strike with an 8 s rising time and a 20 s duration to half peak. Type 2 SPDs prevent overvoltage from spreading into electrical installations and devices.

Type3
Type 3 cables must have a minimum conductor length of 10 meters between the electrical service panel and the site of use.
Installation Guidelines
System Design Review: Before installing a DC SPD, review the PV system design and identify critical components that need protection, such as: Inverters, charge controllers and monitoring systems. Determine the appropriate location to install the DC SPD based on your system layout.
Compliance with Standards: Make sure the DC SPD you choose complies with relevant standards and certifications for solar surge protector in photovoltaic applications, such as: UL 1449, IEC 61643-31 or EN 50539-11. Compliance with these standards ensures that devices meet safety and performance requirements. Correct grounding:
Proper grounding is essential for effective solar surge protector. Make sure the solar array grounding system complies with local electrical codes and industry standards. The grounding conductor should be properly sized, well connected and routed to the grounding electrode system.
Installation of DC SPD at Main Service Entrance: Install a Type 1 DC SPD at the front door of the building to protect the entire electrical system, including the solar array. Connect the DC SPD in parallel with the input power supply. Follow the manufacturer's instructions for proper wiring and connections.
Installing a Subdistrict DC SPD: Especially in large photovoltaic systems, Type 2 DC SPDs are installed in sub-distribution boards or collector boxes. These DC SPDs provide local protection for circuits connected to the panel. Connect the DC SPD in parallel in the circuit to ensure proper wiring and alignment with the main service input DC SPD.
Device-level DC SPD Installation: Depending on system requirements and device sensitivity, you should consider installing Type 3 DC SPDs in specific device layers such as inverters and charge controllers. These DC SPDs provide an additional layer of protection at the device level. Follow the manufacturer's instructions for proper installation and connection.
Bonding and Routing:Ensure proper connections and wiring throughout the PV system. Connect all metal components to create an equipotential bond to minimize potential differences. Use proper wiring practices and wire sizes to handle surge currents and minimize voltage drops.
Regular Maintenance and Inspection:Regularly check and maintain the installed DC SPD according to the manufacturer's recommendations. This includes visual inspection, testing, and replacement if necessary. Regular maintenance helps ensure the long-term effectiveness of your photovoltaic system's overvoltage protection.
We recommend that you consult a qualified solar installer or professional electrician for specific installation guidelines for your solar system and local regulations. By following these guidelines, you can provide robust solar surge protector for your photovoltaic application, protect your equipment, and ensure system reliability.
Certifications
We have the UL1741 mark, certification issued by Underwriters Laboratories, the most important for system interconnection tests in the USA. ZJBENY also holds SAA, CB, CE, TUV, ISO, RoHS certifications.

Contact US
If you have any enquiry about quotation or cooperation, please feel free to email us at benyi@zjbeny.com, or use the following enquiry form. Our sales representative will contact you within 24 hours. Thank you for your interest in our products.
TEL: +86-577-57177008
FAX: +86-577-57177007
Address: Changjiang Rd, Wenzhou Daqiao Industry Park, Yueqing, Wenzhou, Zhejiang, China, 325603
Frequently Asked Questions
Q: What is the difference between AC and DC surge protector?
Q: How do I choose a DC surge protector?
system's operating temperature;
system's voltage;
system's short circuit current rating;
level of the waveform that is to be protected against.
nominal discharge current.
Q: What is a DC protector?
Q: What are the disadvantages of surge protector?
Q: How does a DC SPD work?
Q: Can you use a AC surge protector for DC?
Q: Does it matter what surge protector you get?
Q: Do solar inverters have surge protection?
Q: Is it OK to leave surge protector on all the time?
Q: Do cheap surge protectors work?
Q: Which is safer power strip or surge protector?
Q: What is the difference between Type 1 and Type 2 surge protection?
Q: What is the difference between Type 2 and Type 3 surge protectors?
Q: How do you connect a surge protector to an inverter?
Q: Is surge protection required for solar?
Q: Do I need a power conditioner or surge protector?
Q: What is Type 1 and Type 2 SPD?
Q: Why buy an expensive surge protector?
Q: Should a TV be plugged into a surge protector?
Q: Is 500 joules a good surge protector?
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