UFELE Electric — Solar Pumping, Industrial Drives and PV Protection
Email: sale@ufele.com | B2B Supply and OEM Orders
PV DC Protection and Connection
UFELE supplies the electrical parts that combine, protect, isolate and connect photovoltaic DC circuits.
The range covers PV combiner boxes, DC miniature circuit breakers, DC molded case circuit breakers,
surge protection devices, fuses, isolator switches and PV connectors.
We work with solar distributors, electrical wholesalers, combiner-box builders, system integrators and
OEM buyers. Send the circuit data and order file before asking for a model. Our team checks voltage,
current, pole arrangement, breaking requirements, enclosure conditions, labels and destination documents
as one linked order.
One supplier file for protection devices, connection parts and assembled combiner boxes.
Content reviewed by the UFELE Solar Products Team on July 31, 2026.
Available ratings and documents vary by model. Confirm the current datasheet before final selection.
A product name does not define its correct position. The system designer must first identify where
conductors join, where overcurrent protection is required, where surge energy must be diverted and where
safe isolation is needed. Only then should the buyer compare device ratings.
Each group solves a different circuit task. Review the short selection points below, then send the exact
electrical data for model confirmation. UFELE does not treat one voltage or current value as suitable for
every photovoltaic system.
A PV combiner box organizes several string inputs and one or more outputs inside a selected enclosure.
Its internal device schedule may include fuses, breakers, SPDs, isolators, terminals and optional
monitoring according to the project file.
DC MCBs provide resettable overcurrent and short-circuit protection within their rated application.
UFELE ranges include compact DIN-rail products for PV strings, combiner boxes and DC distribution
circuits. Selected series cover higher-voltage PV duties.
A DC MCCB suits higher-current feeders and distribution circuits when its voltage, interruption,
trip-unit and connection data match the project. Typical buying files cover main combiner outputs,
battery circuits and larger DC distribution cabinets.
A PV DC SPD limits transient overvoltages at a defined protection point. Buyers must coordinate the
SPD with system voltage, installation category, lightning protection concept, earthing arrangement,
backup protection and the equipment that it protects.
PV fuses interrupt specified overcurrent conditions and provide current-limiting protection when
correctly selected. The fuse link and holder form one evaluated combination. Do not compare the fuse
current alone while ignoring voltage, utilization category and breaking capacity.
A DC isolator creates a defined switching and isolation point. Indoor and enclosed outdoor options
serve different installation positions. The device must carry and switch the specified DC duty with
the correct pole configuration and connection method.
PV connectors create detachable cable joints in module, string and branch circuits. UFELE supplies
standard and multi-branch arrangements, including selected pre-assembled cable options. Match the
connector family, cable size and installation tool as one system.
Buyers often place a fuse, MCB, MCCB, SPD and isolator on one quotation sheet without separating their
functions. The table below helps organize the request. It does not replace a protection study or the
exact manufacturer datasheet.
| Product | Main task | Typical selection data | Common ordering mistake |
|---|---|---|---|
| DC fuse | Interrupt specified overcurrent and limit fault energy | Voltage, design current, size, class, breaking capacity, holder | Ordering a fuse link without checking the matching holder |
| DC MCB | Resettable protection for suitable branch and distribution circuits | Voltage, current, poles, trip data, breaking capacity, connection | Using an AC breaker or assuming the same wiring for every DC voltage |
| DC MCCB | Protect and switch higher-current DC feeders | Frame, rated current, voltage, poles, interruption rating, accessories | Comparing frame current while ignoring the actual trip setting and fault level |
| DC SPD | Limit transient overvoltage at a selected protection point | SPD type, Ucpv, Up, discharge ratings, earthing, backup protection | Selecting only by maximum voltage and ignoring coordination |
| DC isolator | Provide load switching and isolation within its rated duty | Voltage, current, utilization duty, poles, enclosure, handle | Treating an isolator as overcurrent protection |
| PV connector | Create a secure detachable cable connection | Connector family, cable size, voltage, current, branch layout, tools | Mixing connector brands or crimp parts without verified compatibility |
The same seven product families may appear in different projects, but their ratings and quantities
change. Start with the array and circuit schedule. Avoid copying an earlier bill of materials into a
project with different modules, temperatures, string counts or fault levels.
Compact enclosures, DIN-rail devices, weather exposure and service access usually drive the package.
Confirm the cold-weather string voltage, cable entry direction and the required outdoor isolation
point before approving the model list.
More strings create a larger coordination task. Buyers often need several combiner-box layouts,
main-output protection, surge protection and controlled labels across one project. A single approved
schedule reduces SKU and wiring-document errors.
Larger arrays may require higher-current MCCBs, multi-string combiner boxes and selected 1500VDC
products. Do not generalize one category rating across the package. Match every device, terminal and
connector to the approved system data.
Solar equipment suppliers can serve very different roles. Local distributors may focus on immediate
stock and installation support. UFELE serves overseas B2B buyers who source solar DC electrical
equipment from China. The value lies in matching several protection and connection products under one
controlled order file.
A category page cannot prove that every product carries the same approval. Certificate scope may change
by model, voltage, current, pole count and destination market. UFELE therefore reviews the document list
against the exact quotation instead of attaching a general certificate folder to every inquiry.
Product-specific standards may include different requirements for breakers, fuses, SPDs, switches,
connectors and assembled boxes. Send the destination requirement before order approval. UFELE will
confirm which certificate copy, test report or declaration applies to the selected item.
A distributor may order combiner boxes, spare fuse links, DC SPDs and connectors in one shipment.
Another buyer may need private labels across several breaker ratings. Both orders need more than a price
list. They need one approved source of truth.
A clear inquiry reduces repeated email and prevents a low-price substitute from entering the order by
mistake. If one value is unknown, send the module datasheet, inverter input data and single-line diagram
for review. Do not estimate a critical rating from an earlier project.
| Information | Why UFELE needs it | Example of a useful entry |
|---|---|---|
| System DC voltage | Defines the required product voltage and connection arrangement | Maximum DC system voltage plus calculated cold-weather string Voc |
| Current and string data | Supports fuse, breaker, connector and conductor checks | Module Isc, strings in parallel, design current and output current |
| Fault and breaking requirement | Helps select devices with suitable interruption performance | Required breaking capacity or project short-circuit study value |
| Installation position | Affects enclosure, SPD, isolator and environmental selection | Indoor cabinet, outdoor rooftop, combiner box or inverter input |
| Product list | Prevents shortened model codes and missing accessories | Full SKU, poles, rating, quantity and required spare parts |
| Destination and documents | Allows model-specific certificate and marking review | Country, requested standard, certificate copy and language |
| OEM files | Keeps product and packing artwork tied to the approved SKU | Logo, label, barcode, inner box, carton mark and manual |
UFELE Electric operates from Wenzhou and has worked in electrical manufacturing since 2005. Our solar
equipment work sits close to the wider UFELE range of low-voltage products, variable frequency drives,
solar pump inverters and assembled PV combiner boxes.
This background helps when a buyer sends a mixed electrical list. We do not read the combiner box,
breaker, fuse and connector as unrelated line items. We check how the requested ratings and quantities
fit the same order. If a voltage row is empty or a label does not match the SKU, we stop and ask.
Review our PV combiner boxes for assembled string-input solutions,
solar pump inverters for water-pumping applications, or
low-voltage electrical products for AC distribution
and control orders.
UFELE supplies PV combiner boxes, DC miniature circuit breakers, DC molded case circuit breakers, DC surge protection devices, DC fuses, DC isolator switches and PV connectors. The range supports solar distributors, panel builders, system integrators and OEM orders.
No. UFELE is an electrical product manufacturer and export supplier based in Wenzhou, China. The company supplies solar DC protection and connection equipment to B2B buyers. Local installation, permitting and system design remain the responsibility of qualified parties in the destination market.
Send the system maximum DC voltage, string open-circuit voltage, operating current, number of strings, short-circuit or fault-current requirement, installation position, enclosure requirement, quantity, destination market and required documents. Add label, packing and barcode files for an OEM order.
The choice depends on circuit current, prospective fault current, required breaking capacity, coordination, reset or replacement preference, installation method and the applicable system design. A fuse, MCB and MCCB do not perform identical roles. Confirm the protection study and the exact model data before selection.
No. PV voltage changes with module count and temperature, while current depends on the string arrangement and module data. Installation category, fault level, altitude, ambient temperature and local rules may also affect selection. Check the exact datasheet and system calculation for each project.
No. Selected product series are available for high-voltage PV applications, including models up to 1500VDC, but the rating varies by series and configuration. Confirm the marked voltage, pole arrangement, connection method and current datasheet for the exact item.
Yes, mixed orders can be reviewed across combiner boxes, breakers, SPDs, fuses, isolators and connectors. UFELE checks model codes, quantities, labels, inner boxes, carton marks and document requests against one approved order file before production.
Certificate and report availability depends on the exact model, rating and destination market. Do not approve an order from a category-level certificate claim. Ask UFELE to match the required document to the model code and electrical rating before order confirmation.
Send the circuit data, product list, quantities, destination market and document needs.
UFELE will review the open points before confirming models and pricing.