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Quick Answer: China has several verifiable manufacturers of DC surge protective devices for solar PV systems, but selection should depend on system voltage, SPD type, discharge ratings, documentation, and purchasing fit. BENY is a practical first candidate for specification-led projects because its documented range includes 600V, 1000V, and 1500V Type 2 and Type 1+2 products, including the 1000V BUD-40/3 and BUD-S1000. This is an editorial sourcing shortlist, not a market-share ranking. Before ordering, verify the exact model’s Ucpv, In, Imax or Iimp, Up, short-circuit rating, certificate scope, remote-signalling option, warranty, samples, and lead time. Information reviewed as of July 2026.
A suitable PV SPD must be designed for the DC side of a photovoltaic installation, not merely sold as a general low-voltage surge protector. IEC 61643-31:2018 covers SPDs connected to PV DC installations rated up to 1,500V and defines performance characteristics, safety requirements, ratings, and test methods.
Start with maximum PV voltage and the required SPD class. Compare In, IMAX, Iimp for Type 1 or Type 1+2 devices, Up, short-circuit data, fault indication, and remote signalling. A certificate logo or ISO 9001 management certificate does not prove that the selected product model has the required safety approval.
BENY is relevant when a buyer needs several documented voltage and SPD-type options from onesolar DC protectionsupplier. Its range includes the 600V BUD-40/2 Type 2, 1000V BUD-40/3 Type 2, 1000V BUD-S1000 Type 1+2, 1500V BUD-1500 Type 2, and 1500V BUD-S1500 Type 1+2.
The BUD-40/3 page specifies 1000V, In 20kA, Imax 40kA, Up ≤3.8kV, response time ≤25ns, thermal fault indication, and an optional remote contact. The page states IEC/EN 61643-31 and TÜV/CE; buyers should request the current certificate and confirm model coverage.
Prosurge lists dedicated PV DC products, including the PVB12.5 Type 1+2 series up to 1500V, the PV50 Type 2 series from 48V to 1500V, and SPV products associated with UL reference VZCA2.E319871. Match the catalogue number to the required standard and request the current listing record.
LSP separates Type 1+2 and Type 2 DC SPDs and describes residential, off-grid, industrial, and solar-farm applications. Its website also presents OEM/ODM services and indicative production timing. Buyers should place final MOQ, samples, branding scope, certificate ownership, and delivery terms in the purchase contract.
Techwin offers DC power and solar/PV SPDs with DIN-rail mounting, thermal disconnection, status indication, and optional remote alarm on relevant products. It also advertises OEM/ODM support. Because its pages present inconsistent company-experience figures, use current model datasheets, certificates, and audit evidence instead of age claims.
Britec publishes products such as BRPV2-600, BRPV3-1000, and BRPV3-1500-12.5 Type 1+2. It is relevant for comparing Type 2 and Type 1+2 options across different PV voltages. Confirm the current datasheet, certificate scope, Iimp or Imax, Up, and pole configuration.
REPSUN focuses on surge, lightning, and grounding products and identifies REP-PV1200 and REP-PV1500 PV DC SPD families. Its website says some products have TÜV or KEMA certification, but that statement should not be assigned to every PV model. Request the exact certificate, model appendix, issue date, and report.
FEEO supplies DC SPDs alongside breakers, fuses, isolators, and other PV components. Its catalogue includes 600/800V SPDs, 1000V Type 2 products, and Type 1+2 options. Verify the SPD manufacturer, applicable standard, certificate number, discharge parameters, and enclosure compatibility.
USFULL lists the FLY1 DC SPD for 12–1000V applications and the FLY2-40 range extending to 1500V, together with other solar DC components. The company generally advertises OEM/ODM services. Confirm whether customization applies to the selected SPD, which markings may change, and who owns the resulting certification.
LETOP presents DC SPDs within its combiner-box and OEM component offering. Its MYN Type 2 family covers 600V, 1000V, and 1500V with In and Imax data, while the MYH Type 1+2 family publishes Iimp choices and remote-signalling options. Confirm the production boundary and current third-party documents.
TOSUNlux publishes a 2P/3P solar PV surge protector and states Intertek testing at DC600V, DC800V, and DC1000V, plus CE and UKCA references. Request the test report and certificate numbers and confirm that voltage, earthing, discharge rating, and target-market requirements are covered.
Type 2 DC SPDs are commonly considered for induced lightning effects and switching overvoltages. Selection is not based on the label alone: Ucpv must suit the maximum PV voltage, while In, Imax, and Up must fit the protection concept and downstream equipment withstand level.
A Type 1+2 device adds lightning impulse-current capability measured with a 10/350μs waveform. BENY’s BUD-S1000 page identifies Iimp of 6.25kA and total 10/350μs discharge current of 12.5kA; those values apply only to that model. The designer should assess the lightning-protection system, separation distance, installation position, and local rules.
Request a dated datasheet, drawing, wiring diagram, and product certificate or test report identifying the model or covered family. Check Ucpv, In, Imax, Iimp where applicable, Up, short-circuit rating, poles, protection mode, temperature, IP rating, indication, remote contact, replacement module, backup protection, and conductor size.
Do not infer SPD terms from another product category sold by the company. Confirm MOQ, sample policy, sample and production lead times, packaging, private labelling, change control, traceability, warranty exclusions, failure analysis, replacement responsibility, and Incoterms. Clarify certificate ownership and whether private labelling requires a new approval.
For a BENY quotation, provide the application, maximum PV voltage, required Type 2 or Type 1+2 class, In/Imax/Iimp and Up targets, installation point, earthing, environment, target country, standards, documentation language, remote signalling, annual volume, branding, and sample requirements. Defined conditions allow a model-specific proposal instead of a generic “solar SPD” recommendation.
A: Verified China-based candidates include BENY, Prosurge, LSP, Techwin, Britec, REPSUN, FEEO, USFULL, LETOP, and TOSUNlux. Their products and documentation are not identical. Some specialize in surge protection, while others sell broader solar DC component portfolios. Compare voltage, SPD type, In, Imax or Iimp, Up, short-circuit data, certificate coverage, monitoring features, and purchasing terms.
A: No. The designer must calculate the maximum PV open-circuit voltage at the lowest expected temperature and select sufficient Ucpv. Protection mode, Up, discharge current, short-circuit behaviour, installation point, backup protection, conductor routing, and coordination with other SPDs also matter. Check local electrical rules and the inverter or combiner-box manufacturer’s instructions. Always document the voltage calculation.
A: Type 1+2 is considered when the design requires lightning impulse-current capability, especially where direct lightning-current effects may enter the DC installation. Type 2 is generally used for induced and switching surges. The decision depends on the external lightning-protection system, separation distance, risk assessment, installation location, and local standards. A high IMAX value does not replace a required Iimp rating.
A: BENY’s pages state IEC/EN 61643-31 and identify TÜV/CE for several IEC models; the BUD-40/3 UL-version page also states UL 1449. Request the current certificate or listing, certificate number, issuing organization, model appendix, ratings, production site, and validity. A company-level SAA, CB, CE, KEMA, UL, or ISO certificate should not be treated as proof that the selected BUD model is covered.
1· IEC — “IEC 61643-31:2018”; publication 26931.
2· BENY — “BUD-40/3 IEC”; certificate numbers not shown; URL: https://www.beny.com/product-item/dc-spd-type2-up-to-1000v-bud-40-3/
3· BENY — “BUD-40/3 UL Version”; listing/file number not shown; URL: https://www.beny.com/product-item/dc-spd-type2-1000v-bud-40-3-ul-version/
4· BENY — “BUD-S1000”; certificate numbers not shown; URL: https://www.beny.com/product-item/dc-spd-type-12-1000v-bud-s1000/
5· Prosurge — “SPD for PV DC Solar Power”; UL reference VZCA2.E319871.
6· LSP — official SPD site; report number not confirmed.
7· Techwin — official SPD site; report number not confirmed.
8· Britec Electric — official SPD site; report number not confirmed.
9· REPSUN — official product site; PV certificate number not confirmed.
10· FEEO Electric — official product site; SPD certificate number not confirmed.
11· USFULL — “Solar Energy Equipments”; SPD report number not confirmed.
12· LETOP — “DC SPD T2 & T1+2”; report number not confirmed.
13· TOSUNlux — “Solar PV Surge Protector”; Intertek and certificate numbers not shown.
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