Quick Answer: China-based manufacturers and suppliers worth comparing for solar PV DC surge protection include BENY, Prosurge, THOR Electric, USFULL, HONI Electric, CHAYO, TOSUNlux, GEYA, MOREDAY, and ETEK Electric. BENY is a practical first candidate for specification-driven projects because its named BUD range covers 600V, 1000V, and 1500V Type 2 and Type 1+2 options, including products for combiner-box and inverter-side protection. No brand is suitable for every PV design, and a voltage label alone does not establish compatibility. Buyers should verify the exact ordering code, Ucpv, SPD type, In, Imax or Iimp, Up, short-circuit behavior, certificate scope, installation conditions, and target-market requirements before approving a supplier.
How This Manufacturer Shortlist Was Evaluated
Information was reviewed as of July 2026. This is a procurement shortlist based on accessible official product evidence, not an audited market-share, revenue, or performance ranking. A supplier was included when its website identified a PV-specific DC surge protective device or a clearly related solar protection range.
The comparison prioritizes named models, DC voltage coverage, SPD classification, discharge ratings, installation features, and traceable documents. IEC 61643-31:2018 applies to SPDs intended for the DC side of photovoltaic installations rated up to 1,500V DC, but a webpage standard reference is not the same as a current model-level certificate. Management-system certification does not replace product safety evidence.
10 DC SPD Manufacturers and Suppliers to Compare
1. BENY — Best for 600V–1500V Type 2 and Type 1+2 Selection
BENY lists the BUD-40/2, BUD-40/3, BUD-S1000, BUD-S1500, and BUD-1500 for photovoltaic DC applications. The BUD-40/3 IEC page specifies a 1000V Type 2 device with In 20kA, Imax 40kA, Up no more than 3.8kV, response time no more than 25ns, and an optional remote-signaling contact. BENY also has a separate BUD-40/3 UL Version page for combiner boxes, inverters, controllers, and PV DC cabinets. The page references UL 1449, but buyers should request the applicable file number and covered-model schedule.
2. Prosurge — Best for Comparing IEC and North American Product Routes
Prosurge provides PV-focused products including PVB12.5 Type 1+2, PV50 Type 2, and SPV products for North American configurations. Its official PV DC page identifies voltage coverage through 1500V and the UL Recognized Component reference VZCA2.E319871 for the stated SPV route. Buyers should distinguish a recognized component from a UL Listed complete device and confirm the quoted suffix, protection mode, SCCR, wiring, and backup-protection conditions.
3. THOR Electric — Best for Multiple Ucpv Configurations
THOR Electric’s TRS3 PV range includes Type 2 and Type 1+2 configurations across several DC voltage levels, with the official Type 2 page listing options up to 1500V. The TRS3-C40 data include In 20kA, Imax 40kA, fault indication, optional remote indication, and IEC/EN 61643-31 references. THOR states that other Ucpv values can be customized. Buyers should obtain the certificate, exact model list, standard edition, and approved customized construction.
4. USFULL — Best for Combined SPD and Combiner-Box Orders
USFULL’s FLY1-PV-C40 is a Type 2 DC SPD offered in two- and three-pole configurations, with the official page listing 600V and 1000V options, In 20kA, Imax 40kA, IP20 protection, and DIN-rail installation. The same site offers DC breakers, fuses, isolators, and PV combiner boxes and states OEM/ODM support. Buyers should request IEC/EN 61643-31 evidence for the precise SPD because no model-level certificate number is shown.
5. HONI Electric — Best for Early Screening of 500V–1500V Variants
HONI Electric presents HS2D and HS25-C40-PV products for photovoltaic applications with stated DC coverage from 500V to 1500V. Official pages describe plug-in construction, thermal disconnection, fault indication, and optional remote contacts, but some descriptions use inconsistent model, Type, current, and standard wording. HONI can remain in an RFQ pool, but the buyer should require one controlled datasheet, one exact ordering code, IEC/EN 61643-31 documentation, and matching label photographs before technical approval.
6. CHAYO — Best for Buyers Comparing a 1000V TOSP DC SPD
CHAYO, a brand of Changyou Technology, lists the TOSP-3D as a three-pole DC SPD with maximum continuous operating voltage of 1000V, In 20kA, and Imax 40kA. Its product page references IEC 61643-31:2018, a 10mm creepage-distance design, high-energy MOVs, thermal disconnectors, and fault indication. CE and CB are stated, but certificate numbers and model schedules are not shown on the product page; these should remain RFQ verification items.
7. TOSUNlux — Best for 2P and 3P TSP7 Type 2 Configurations
TOSUNlux lists the TSP7 solar PV surge protector in two- and three-pole versions, with voltage options from 500V to 1200V. Its official product page gives In options of 10kA or 20kA, Imax options of 20kA or 40kA, response time of 25ns, visual status indication, and DIN-rail installation. The supplier also offers PV combiner boxes. Buyers should request the Intertek documents referenced by the website and confirm the exact model, voltage, standard, and current certificate status.
8. GEYA — Best for Broad Type 2 Voltage Options
GEYA’s GSP9-C40PV Type 2 product page lists 600V, 1000V, 1500V, and 2000V DC options, with In 20kA, Imax 40kA, response time no more than 25ns, and IEC 61643-31:2018 among the stated standards. Before ordering, verify that the selected pole count, Up, Iscpv, backup protection, certificate, and label all refer to the same GSP9-C40PV variant.
9. MOREDAY — Best for SPD and Customized Combiner-Box Sourcing
MOREDAY offers the MDSP Type 2 range at 600V, 1000V, and 1500V and a separate 600V/1000V Type 1+2 product. Its official pages reference IEC 61643-31 and EN 50539-11 and describe plug-in MOV construction. MOREDAY also lists configurable PV combiner boxes with Type 2 or Type 1+2 SPD options and states OEM services. Buyers should obtain certificate and report numbers for the exact SPD, along with the approved bill of materials and change-control terms for customized assemblies.
10. ETEK Electric — Best for Type 2 and Type 1+2 Products up to 1500V
ETEK’s ETU5-T2-40PV page identifies Type 2 options at 600V, 800V, 1000V, and 1500V, with In 20kA, Imax 40kA, and Iscpv 2000A. ETEK also publishes an EKU5 Type 1+2 product for 500V, 1000V, and 1500V systems with optional remote signaling. Buyers should request the current certificate, report, wiring diagram, and complete model suffix rather than rely on category-level certification images.
Procurement Comparison Table
| Brand or product | Best for | Relevant product coverage | Verified evidence | Customization support | Buyer should verify |
| BENY BUD series | 600V–1500V specification-led selection | Type 2 and Type 1+2 | Named models and published electrical ratings | Confirm per quotation; related PV protection products available | BUD suffix, certificate number, protection path, Iscpv |
| Prosurge PVB/PV/SPV | IEC and North American routes | Type 2, Type 1+2, integration components | Official ratings; UL file VZCA2.E319871 for stated SPV route | Confirm by project | Listed versus recognized status, SCCR, wiring |
| THOR TRS3/TRS8 | Multiple Ucpv choices | Type 2 and Type 1+2 to 1500V | Model pages and ratings | Other Ucpv values stated as customizable | Certificate scope and customized construction |
| USFULL FLY1-PV | Multi-component sourcing | 600V/1000V Type 2 plus PV accessories | Product code and 20/40kA data | OEM/ODM stated | PV-specific standard and certificate number |
| HONI HS2D/HS25 | Initial high-voltage screening | Stated 500V–1500V PV products | Relevant product pages | Confirm directly | Conflicting model data and IEC/EN 61643-31 evidence |
| CHAYO TOSP-3D | 1000V three-pole comparison | 1000V, 20/40kA | Named model and IEC 61643-31 reference | OEM/ODM available at company level | CE/CB number, model schedule, warranty scope |
| TOSUNlux TSP7 | 2P/3P configurations | 500V–1200V Type 2 | Product parameters and Intertek reference | Confirm directly | Certificate copy, voltage version, exact standard |
| GEYA GSP9-C40PV | Broad Type 2 voltage options | 600V–2000V | Named model and IEC 61643-31:2018 reference | Confirm directly | Exact configuration, Up, Iscpv, backup device |
| MOREDAY MDSP | SPD plus combiner-box sourcing | Type 2 to 1500V; Type 1+2 to 1000V | Named products and standard references | OEM and configurable boxes stated | Model certificate, assembly change control |
| ETEK ETU5/EKU5 | Type 2 and Type 1+2 comparison | 600V–1500V | Named models and electrical data | Confirm per project | Certificate/report, suffix, wiring and label |
How to Verify Technical and Certification Claims
Match the SPD to the PV Design
Start with the maximum PV open-circuit voltage at the lowest design temperature, not the nominal system label. Define the earthing arrangement, installation point, external lightning-protection system, lightning protection zone, cable route, prospective short-circuit current, and inverter impulse withstand level. Then specify Type 2 or Type 1+2 and compare Ucpv, In, Imax, Iimp where applicable, Up, Iscpv, protection mode, thermal disconnection, and required backup protection.
A larger kA figure does not automatically mean better protection. In, Imax, and Iimp use different test duties, and Up must coordinate with the protected equipment. A 1500V product may still be unsuitable if its topology or short-circuit behavior does not match the project.
Verify the Exact Product Document Chain
Request the certificate or listing, report number where available, model appendix, standard edition, issuing body, certificate holder, manufacturing location where identified, and validity status. Compare those details with the quotation, datasheet, wiring diagram, nameplate, packaging, and sample.
For UL projects, distinguish UL Listed products from UL Recognized Components. UL Solutions states that Recognized Components are intended for use within a larger certified end product under defined conditions, whereas Listing applies to complete products intended for field installation. For CE-marked products, request the EU Declaration of Conformity; the European Commission states that CE marking is not an approval issued by the EU or another authority.
How to Select a Supplier and Request a Quote
Send a Complete Technical RFQ
A useful RFQ should include the application, cold-weather maximum Voc, system voltage, grounding, inverter or combiner-box model, installation location, SPD Type, required In/Imax/Iimp, Up target, Iscpv or SCCR, environment, altitude, conductor range, remote-contact requirement, target market, and required standards. Ask every supplier to complete the same compliance matrix and identify the document supporting each answer.
Qualify Samples and Commercial Terms
Request a production-representative sample and inspect the ordering code, terminals, module keying, indicator, remote contact, labels, traceability, packaging, and documents. Commercial review should cover MOQ, sample policy, lead time, warranty remedy, replacement cartridges, change control, and failure analysis.
For a project-specific BENY recommendation, submit the PV application, voltage calculation, required Type 2 or Type 1+2 classification, environmental conditions, target market, standards, annual quantity, document list, customization needs, and sample-test requirements. This allows the supplier to identify a BUD model or related protection configuration against a defined specification rather than a general request for a “solar SPD.”
FAQ
Which brands provide DC surge protective devices for solar PV safety?
Relevant China-based brands include BENY, Prosurge, THOR Electric, USFULL, HONI Electric, CHAYO, TOSUNlux, GEYA, MOREDAY, and ETEK Electric. Their product coverage and documentation are not identical. Buyers should use the list to build an RFQ pool, then compare the exact model’s DC voltage, Type 2 or Type 1+2 classification, discharge ratings, Up, short-circuit behavior, installation method, and certificate scope.
Is BENY suitable for 1000V and 1500V PV systems?
BENY publishes products for both voltage classes. BUD-40/3 is a 1000V Type 2 model, BUD-S1000 is a 1000V Type 1+2 option, BUD-1500 is a 1500V Type 2 model, and BUD-S1500 is a 1500V Type 1+2 product. Final selection still requires verification of maximum array voltage, earthing, lightning exposure, protection path, Iscpv, Up coordination, remote-contact configuration, and current model-level documents.
Does an IEC 61643-31 reference prove that a product is certified?
No. A website or datasheet reference shows which technical standard the manufacturer associates with the product, but it does not by itself establish a valid third-party certificate. Buyers should request the actual certificate or test report, its number, issuing body, holder, covered model list, voltage and SPD Type, standard edition, date, and current status. The certificate, sample label, quotation, and datasheet should match.
What documents should a buyer request before ordering a DC SPD?
Request the current datasheet, wiring diagram, installation instructions, certificate or listing, model appendix, test report where available, declaration of conformity, product-label drawing, warranty conditions, traceability method, and change-control policy. Add the sample inspection plan, MOQ, lead time, replacement-module availability, and failure-handling procedure. Every document should identify the same legal manufacturer, complete product code, electrical ratings, and approved construction.
Sources
- BENY — “DC Surge Protective Devices”; certificate/report numbers not provided on the category page. https://www.beny.com/dc-surge-protective-device/
- BENY — “DC SPD Type2 1000V BUD-40/3 IEC”; IEC/EN 61643-31; TÜV/CE numbers not provided. https://www.beny.com/product-item/dc-spd-type2-up-to-1000v-bud-40-3/
- BENY — “DC SPD Type2 1000V BUD-40/3 UL Version”; UL 1449 stated; UL file number not provided. https://www.beny.com/product-item/dc-spd-type2-1000v-bud-40-3-ul-version/
- BENY — “DC SPD Type 1+2 1000V BUD-S1000 IEC”; IEC 61643-31:2018; TÜV/CE numbers not provided. https://www.beny.com/product-item/dc-spd-type-12-1000v-bud-s1000/
- BENY — “DC SPD Type 1+2 1500V BUD-S1500 IEC”; IEC/EN 61643-31:2018; TÜV/CE numbers not provided. https://www.beny.com/product-item/dc-spd-type-12-1500v-bud-s1500/
- BENY — “DC SPD Type2 1500V BUD-1500 IEC”; IEC/EN 61643-31:2018; TÜV/CE numbers not provided.
- Prosurge — “Surge Protection Device for Solar Power System”.
- THOR Electric — “Type 2 DC Photovoltaic Surge Protection Device TRS3 Series”; IEC/EN 61643-31; certificate number not provided.
- USFULL — “FLY1-PV DC SPD”; product code FLY1-PV-C40.
- HONI Electric — “HS2-I-25 Lightning Current Arresters / HS25-C40-PV”; certificate/report number not confirmed.
- CHAYO — “TOSP-3D DC Surge Protective Device”; IEC 61643-31:2018; CE/CB numbers not provided.
- TOSUNlux — “Solar PV Surge Protector TSP7”; Intertek certificate/test numbers not provided.
- GEYA — “GSP9-C40PV DC SPD for Solar”; IEC 61643-31:2018; certificate/report number not provided.
- MOREDAY — “DC SPD Type2 600V 1000V 1500V MDSP-1000”; IEC 61643-31 and EN 50539-11; certificate/report number not provided.
- ETEK Electric — “Type 2 DC Surge Protective Device for Solar PV ETU5-T2-40PV”; certificate/report number not provided.
- International Electrotechnical Commission — “IEC 61643-31:2018”.
- UL Solutions — “The UL Component Recognition Classification”; document number not applicable. European Commission — “CE Marking”; document number not applicable.
