SUNTREE

SUNTREE Solar PV Cables, MC4 Connectors, DC Isolators & Electrical Protection – European B2B Supply

SUNTREE Electric Group is a manufacturer of photovoltaic electrical protection equipment, solar DC cables, PV connectors, DC isolator switches, surge protective devices, circuit breakers, fuses, combiner boxes and electrical distribution components for solar energy and battery storage installations.

Established in China in 2007, SUNTREE has developed an extensive electrical equipment portfolio serving residential photovoltaic installations, commercial and industrial solar PV systems, battery energy storage, electrical distribution and related renewable energy applications.

The manufacturer’s solar protection range includes 1000V and 1500V DC components, PV switch disconnectors, DC circuit breakers, Type 1+2 and Type 2 surge protection, gPV fuse protection, AC distribution equipment and preconfigured combiner boxes.

At 3Buy Solar, professional solar installers, qualified electricians, EPC contractors, resellers and solar procurement teams can purchase selected SUNTREE photovoltaic connectors, solar DC cables and pre-assembled PV wiring products through our European B2B webshop.

Our currently listed SUNTREE-related products include 4–6mm² MC4-type connector pairs, 6mm² pre-assembled solar cable sets and 10mm² photovoltaic cable reels in red and black.

For projects requiring SUNTREE DC isolators, surge protective devices, PV fuses, combiner boxes or larger protection equipment packages, contact 3Buy Solar for a technical procurement enquiry.

SUNTREE components form part of the electrical balance of system (BOS) required for a complete solar PV installation.

Whether the project uses a residential hybrid solar inverter, a commercial string inverter, solar batteries or a larger energy storage system, the correct cables, protection devices and disconnection equipment are essential for safe and reliable operation.

Buy SUNTREE Solar PV Cables & MC4 Connectors at 3Buy Solar

Our SUNTREE brand catalogue includes photovoltaic cable products and connector accessories for residential, commercial and industrial solar installations.

Professional buyers can order directly from the individual product pages, subject to product configuration, current availability and applicable order quantities.

SUNTREE MC4 Solar Connector Set – 4–6mm² PV Cable

SUNTREE MC4 Solar Connector Set – Male/Female Pair

The listed connector set is designed for photovoltaic DC cable termination.

The product is relevant for compatible photovoltaic string cable connections and replacement terminations in professional PV systems.

Installer note: An MC4-style connector must not automatically be assumed electrically certified for mating with connectors from another manufacturer. Verify the exact connector manufacturer, mating combination and applicable approval before installation.

SUNTREE 6mm² Pre-Assembled Solar PV Cable – 2×10m

SUNTREE 6mm² Solar PV Cable Set – 2×10m Red & Black

This product provides two pre-assembled photovoltaic cable lengths:

• 1 × 10m red solar DC cable
• 1 × 10m black solar DC cable
• 6mm² conductor cross-section
• Pre-fitted photovoltaic connectors

Pre-assembled PV cable sets can reduce the amount of cable preparation and termination work required on site.

They are particularly relevant to installers preparing repeat residential installations, smaller solar PV systems and correctly specified inverter connections.

The product listing supports multiple cable manufacturers. Confirm the selected cable brand, connector type and electrical ratings before ordering.

SUNTREE 6mm² Pre-Assembled Solar PV Cable – 2×20m

SUNTREE 6mm² Solar PV Cable Set – 2×20m Red & Black

The 20m configuration is intended for installations requiring longer photovoltaic cable runs.

The set includes:

• 1 × 20m red solar DC cable
• 1 × 20m black solar DC cable
• 6mm² conductor cross-section
• Pre-assembled photovoltaic connectors

For installers, the appropriate cable length and cross-section must be determined by current, route length, installation method, permissible voltage drop and the electrical characteristics of the solar PV array.

SUNTREE 10mm² Solar DC Cable – 100m & 500m Reels

3Buy Solar also lists 10mm² photovoltaic cable products available with different cable manufacturer options, including SUNTREE.

100m Solar DC Cable:

• 10mm² Solar PV Cable – 100m Black
• 10mm² Solar PV Cable – 100m Red

500m Solar DC Cable:

• 10mm² Solar PV Cable – 500m Black
• 10mm² Solar PV Cable – 500m Red

These are multibrand cable listings. Buyers requesting SUNTREE cable should select or confirm the SUNTREE manufacturer variant before finalising the order.

10mm² solar DC cable is relevant to installations where the electrical design calls for a larger conductor cross-section, including longer cable routes, higher-current circuits and certain commercial photovoltaic projects.

The correct cable must be selected by calculation, not by assuming that a larger conductor is always required.

SUNTREE Electrical Protection – Main Product Families

Beyond photovoltaic cables and connectors, SUNTREE manufactures a broad range of AC and DC electrical protection equipment.

The main families relevant to professional solar PV installers include:

These devices perform different functions.

A DC isolator is not a substitute for a fuse or circuit breaker. A surge protective device is not an overcurrent protective device.

Correct protection design requires the relevant devices to be selected and coordinated according to their intended electrical functions.

SUNTREE DC Isolator Switches – 1000V & 1500V PV Disconnection

SUNTREE manufactures DC isolator switches for photovoltaic installations requiring controlled disconnection of DC circuits.

DC isolation is important because solar panels can continue generating dangerous DC voltage whenever sufficient light is present, even when the inverter is switched off.

A correctly rated DC switch disconnector provides a means of isolating the appropriate part of the photovoltaic circuit for maintenance, inspection and equipment replacement.

SUNTREE DC Isolator Applications

Typical applications include:

• Residential rooftop PV installations
• Commercial solar PV systems
• Inverter DC input isolation
• PV combiner boxes
• DC distribution enclosures
• Ground-mounted photovoltaic arrays
• PV maintenance and replacement work
• Suitable hybrid inverter installations

SUNTREE 1000V DC Isolators

The manufacturer offers DC isolator equipment suitable for specified PV circuits up to 1000V DC.

Products are available in different current, pole and enclosure configurations.

The correct switch must be selected according to the manufacturer’s DC utilisation category and its current rating at the intended operating voltage.

SUNTREE 1500V DC Isolators

SUNTREE also develops higher-voltage DC isolation equipment, including the SGL8N family with 1500V-class configurations.

These devices are relevant to appropriately engineered higher-voltage photovoltaic installations.

A 1500V-rated isolator can only be used within its actual approved electrical ratings and connection arrangement.

DC Isolator Selection Checklist

For professional procurement, verify:

• Maximum photovoltaic open-circuit voltage
• Minimum design temperature
• Maximum operating DC current
• Rated DC voltage
• Switching utilisation category
• Required number of poles
• Required contact configuration
• Mounting arrangement
• Environmental protection rating
• Locking and maintenance requirements
• Applicable product certificate

Important: A solar DC isolator must be suitable for the intended switching duty. A device rated only for isolation must not be assumed capable of safely interrupting load current.

Likewise, a DC isolator is not automatically a short-circuit protective device.

Browse the DC Isolators & PV Disconnect Switches category or contact 3Buy Solar with the required SUNTREE model and electrical specifications.

SUNTREE DC Surge Protection Devices – Type 1+2 & Type 2 PV SPD

The SUNTREE DC Surge Protective Device (SPD) portfolio provides equipment designed to limit transient overvoltages in photovoltaic circuits.

Such transients can result from lightning-related events and switching operations.

Surge protection is an important consideration for solar PV installations because photovoltaic arrays, outdoor cables and inverter DC inputs can be exposed to electrical disturbances.

SUNTREE PV SPD Product Families

The manufacturer offers DC surge protection equipment including:

• SUP2-DC surge protection devices
• SUP2H-PV series
• Type 2 PV surge protection
• Combined Type 1+2 PV surge protection
• Products for different DC voltage classes
• Replaceable protection modules on supported models
• Remote status signalling on selected devices

The manufacturer’s portfolio covers multiple PV voltage configurations, including 600V, 1000V and 1500V DC classes.

Type 1+2 vs Type 2 Solar Surge Protection

Type 2 SPD

Generally used for protection against induced and switching-related transient overvoltages in appropriately designed electrical installations.

Type 1+2 SPD

Combines Type 1 and Type 2 protective functions and may be required where the lightning protection assessment identifies the need for equipment capable of handling lightning current.

The correct selection depends on building lightning protection, PV installation design, cable routing, protection zones and applicable standards.

Technical Parameters for PV SPD Selection

For professional installers, comparing SPDs by maximum discharge current alone is insufficient.

The correct equipment must have an appropriate continuous operating voltage, protection level, discharge capability, short-circuit characteristics and installation arrangement.

SUNTREE SUP2-DC & SUP2H-PV

SUNTREE publishes product and certification documentation for several PV surge protection devices.

Selected SUP2H-PV variants have manufacturer-published test certificates referencing IEC/EN 61643-31.

However, the certificate must be checked against the exact model and voltage rating being purchased.

Official manufacturer resources:

• SUNTREE DC Surge Protective Devices
• SUNTREE Product Certificates

Solar Battery & Energy Storage Surge Protection

Energy storage installations may also require surge protection at appropriate AC, DC and communication interfaces.

A PV-array SPD cannot automatically be substituted for a battery DC surge protective device.

Battery protection must be designed according to the actual battery voltage, grounding arrangement and relevant product requirements.

Installer note: IEC 61643-31 addresses SPDs on the photovoltaic DC side. It should not be used as blanket evidence that a particular PV SPD is approved for the battery DC side of an energy storage system.

SUNTREE PV Fuses & Fuse Holders – gPV Solar String Protection

SUNTREE manufactures photovoltaic fuses and fuse holders for protection against specified overcurrent and fault conditions in solar DC circuits.

PV fuses are important in systems where reverse currents from parallel strings may exceed the permissible limits of the photovoltaic modules or associated wiring.

What Is a gPV Fuse?

The designation gPV identifies a fuse class intended for photovoltaic applications.

The relevant international product standard is IEC 60269-6.

A correctly selected gPV fuse is designed for the electrical characteristics and fault-clearing requirements of photovoltaic DC circuits.

This differs from a general-purpose AC fuse.

PV String Fuse Selection

A professional installer should verify:

• PV module short-circuit current (Isc)
• Temperature and design correction factors
• Number of parallel strings
• Maximum module series fuse rating
• Rated fuse current
• Rated DC voltage
• Fuse breaking capacity
• Fuse dimensions
• Compatible fuse holder
• Circuit location
• Manufacturer protection recommendations

When Are PV String Fuses Required?

Not every solar PV string automatically requires a separate string fuse.

Whether string fuses are necessary depends on the photovoltaic array configuration, the possible reverse fault current and the maximum series fuse rating permitted by the solar panel manufacturer.

For multiple parallel strings, the available reverse current contribution must be assessed.

A correctly selected fuse can help protect the affected circuit, but it does not replace the need for suitable electrical design.

PV Fuses vs Battery Fuses

A photovoltaic string fuse and a battery protection fuse may have different electrical requirements.

Solar batteries can deliver much greater fault currents than typical PV strings.

For battery energy storage systems, the fuse must therefore be selected according to the battery DC system voltage, prospective short-circuit current, interruption capability and the battery manufacturer’s requirements.

Do not assume that a fuse marked gPV is automatically the correct protection device for a lithium battery bank.

Manufacturer reference: SUNTREE PV Fuses & Related Products

For additional procurement options, visit Battery Fuses & ESS Protection Components.

SUNTREE DC Circuit Breakers, MCBs & MCCBs

SUNTREE’s electrical protection portfolio also includes DC miniature circuit breakers, moulded-case circuit breakers and other DC overcurrent protection equipment.

These devices can be relevant to photovoltaic and energy storage installations where suitable fault interruption and circuit protection are required.

DC MCB vs DC MCCB

DC MCB – Miniature Circuit Breaker

Typically used in lower-current circuits where the device’s current, DC voltage and breaking capacity are appropriate.

DC MCCB – Moulded-Case Circuit Breaker

Generally provides options for higher-current applications, larger circuit arrangements and greater fault protection requirements.

The correct selection depends on the model’s electrical characteristics, not its physical appearance.

Key Technical Parameters

• Rated operating voltage
• Rated current
• Number of poles
• DC polarity requirements, if applicable
• Rated breaking capacity
• Time-current characteristics
• Ambient temperature derating
• Installation orientation
• Terminal and conductor capacity
• Isolation capability
• Coordination with upstream and downstream protection

Why AC Circuit Breakers Cannot Automatically Be Used on DC

Interrupting DC current can be more demanding because direct current does not have the natural zero crossings found in AC waveforms.

A circuit breaker rated for 230V or 400V AC cannot be assumed suitable for a 600V, 1000V or 1500V DC photovoltaic circuit.

The manufacturer must explicitly specify the required DC operating and interruption ratings.

DC Protection for Hybrid Solar Inverters

A hybrid PV installation may contain several distinct DC circuits:

• Solar panel strings
• PV combiner outputs
• Battery DC connections
• Battery-to-inverter cables
• Internal or external battery protection circuits

Each circuit has its own operating voltage, current and prospective fault-current characteristics.

For example, a low-voltage 51.2V battery system may require very high DC current capability, while a high-voltage PV string operates at a much higher voltage but lower current.

The same protective device cannot be assumed suitable for both applications.

Manufacturer information: SUNTREE Official Product Catalogue

SUNTREE Solar PV Combiner Boxes – String Aggregation & Protection

SUNTREE manufactures solar DC combiner boxes designed to group photovoltaic string circuits and accommodate appropriate electrical protection components.

A PV combiner box can help organise wiring and provide a defined location for string fuses, surge protection, isolation and other required components.

SUNTREE SHLX-PV Combiner Box Series

The manufacturer’s portfolio includes SHLX-PV combiner box configurations for different string input and output requirements.

Examples from the manufacturer’s documentation include:

These are example manufacturer configurations. Enclosure material, installed protection devices and maximum electrical ratings must be verified for the exact model.

Typical Components of a PV Combiner Box

Depending on configuration, a combiner box may include:

• DC PV string fuse holders
• gPV fuse links
• DC surge protective devices
• DC isolator or switch disconnector
• String connection terminals
• Positive and negative busbars
• PE terminals
• Cable glands
• Protective enclosure
• Warning labels
• Monitoring equipment where specified

1000V & 1500V Solar Combiner Boxes

SUNTREE offers different combiner box solutions for appropriately rated photovoltaic systems.

A 1000V combiner box is not automatically suitable for a 1500V PV array.

Every installed component, including the fuse holders, SPDs, disconnectors, wiring, terminals and enclosure assembly, must meet the actual system requirements.

IP65 Outdoor Combiner Boxes

Selected SUNTREE combiner box models are supplied with IP65-rated enclosures.

IP65 provides defined protection against dust and water ingress when the enclosure is correctly installed and all cable entries are properly sealed.

It does not automatically establish suitability for every outdoor environment, continuous direct sunlight exposure or corrosive atmosphere.

Combiner Boxes for Commercial Solar PV

Commercial installations may require several string groups, multiple MPPT inputs and clearly organised DC protection.

The correct arrangement should follow the inverter manufacturer’s permitted string configuration.

Combining strings from different MPPT trackers without an approved electrical design can create operating and protection problems.

Official manufacturer resource: SUNTREE Combiner Box Product Range

3Buy Solar category: Solar PV & ESS Combiner Boxes

SUNTREE AC Protection – Isolators, Circuit Breakers, RCDs & Distribution

A complete photovoltaic system requires appropriate AC-side protection as well as DC-side protection.

SUNTREE manufactures electrical distribution equipment including AC circuit breakers, disconnect switches, residual-current protective devices and associated switching equipment.

AC Disconnect Switches

AC disconnect switches provide controlled isolation of suitable AC circuits.

In photovoltaic installations, they may be used for inverter output isolation and maintenance access.

The correct number of poles and operating rating depend on whether the installation is single-phase or three-phase.

Browse AC Disconnect Switches for Solar Inverters.

AC Miniature Circuit Breakers

AC MCBs provide overcurrent protection when selected according to the electrical circuit.

Relevant parameters include:

• Nominal voltage
• Rated current
• Tripping characteristic
• Breaking capacity
• Number of poles
• Cable protection requirements
• Prospective short-circuit current

RCDs, RCCBs & RCBOs

Residual-current protection requires careful selection in installations containing transformerless solar inverters and power electronics.

The permitted RCD type depends on the inverter design, possible DC residual current, internal protective functions, earthing system and local electrical rules.

Type A and Type B residual-current devices are not universally interchangeable.

Installers should consult the inverter manufacturer’s recommendations before selecting the required device.

Browse RCD, RCCB & RCBO Protection for Solar PV.

AC Surge Protection

Depending on the installation, AC-side surge protection may be required at the main distribution board, inverter connection or other suitable locations.

DC-side photovoltaic surge protection and AC-side distribution protection must be coordinated according to the electrical design.

Correct equipment selection is particularly important in hybrid solar inverter systems, where the installation may have separate grid, backup and auxiliary AC circuits.

SUNTREE Rapid Shutdown & Firefighter Safety Equipment

SUNTREE’s broader product portfolio includes photovoltaic rapid shutdown technology, with manufacturer certification resources covering the SKS-Y-20 panel-level device family.

Rapid shutdown and firefighter safety equipment are used where the electrical design, applicable regulations or project requirements call for additional photovoltaic disconnection measures.

DC Isolation vs Rapid Shutdown

A conventional DC isolator disconnects the appropriate circuit at its installation location.

However, photovoltaic modules and upstream wiring can remain energised when exposed to light.

Rapid shutdown equipment may provide additional circuit-level or module-level disconnection functionality, depending on its architecture.

A firefighter switch is not automatically equivalent to module-level rapid shutdown.

For professional installers, the distinction is important when designing roof-mounted arrays, emergency access arrangements and building-entry cable routes.

What to Verify Before Ordering

• Required shutdown function
• PV string voltage and current
• Number of strings or modules
• Device location
• Required remote activation
• Automatic shutdown behaviour
• Supported inverter compatibility
• Communication and power supply requirements
• Restart procedure
• Applicable country requirements
• Manufacturer test and certification documentation

For further information, visit Rapid Shutdown & Firefighter Safety Switches at 3Buy Solar.

SUNTREE Solar PV Cables – H1Z2Z2-K, 6mm² & 10mm² DC Wiring

Correct solar DC wiring is essential for the safe operation of photovoltaic systems.

Solar cables must withstand electrical loading, temperature variations, UV exposure and the environmental conditions encountered over the installation’s service life.

SUNTREE manufactures photovoltaic cable products, including H1Z2Z2-K-type wiring for suitable solar applications.

H1Z2Z2-K Solar Cable

H1Z2Z2-K is a European photovoltaic cable designation associated with EN 50618.

Depending on the exact cable construction and certification, such products provide characteristics including:

• Flexible conductor construction
• Double insulation
• UV and weather resistance
• Ozone resistance
• Halogen-free materials
• Suitable electrical insulation for PV DC circuits
• Outdoor photovoltaic installation capability

The exact voltage class, conductor characteristics, temperature range and fire performance must be checked in the selected cable datasheet.

6mm² vs 10mm² Solar Cable

A larger conductor cross-section can reduce electrical resistance and voltage drop.

However, the correct cable depends on current, route length, conductor temperature, installation method and permissible voltage drop.

Pre-Assembled vs Field-Terminated Solar Cable

Pre-assembled solar cables arrive with connectors installed, reducing on-site connector assembly work.

Field-terminated cables provide greater flexibility for custom cable lengths and site-specific routing.

Both approaches require correct electrical ratings and installation procedures.

For pre-assembled products, verify the connector manufacturer, conductor size, assembly method and documented mating compatibility.

For field-terminated products, use the connector manufacturer’s approved crimping tools, stripping dimensions and assembly instructions.

Browse Solar PV Cables, Wiring & Connectors.

SUNTREE MC4-Type Connectors – Installation & Compatibility Requirements

Photovoltaic connectors provide detachable electrical connections between solar modules, PV strings and other compatible DC components.

For professional installers, connector quality and correct mating are important because poor electrical contact can increase resistance, local heating and the risk of connection failure.

SUNTREE PV Connector Applications

Suitable connectors may be used in:

• Solar module string cabling
• Photovoltaic extension cables
• Pre-assembled PV wiring sets
• Combiner box connections
• Approved inverter-side DC connections
• Maintenance and replacement wiring

Why MC4-Type Does Not Mean Universal Compatibility

The term “MC4-compatible” is widely used in the solar industry, but it should not be interpreted as proof that connectors from different manufacturers can be safely mated.

Connector shape alone does not establish matching contact tolerances, sealing performance or approved electrical compatibility.

For professional installation, use mating connector combinations permitted by the relevant manufacturers and applicable product and installation standards.

Do not assume that a SUNTREE connector can be mated directly with an original Stäubli MC4 connector or any other manufacturer’s connector without the required approval.

Connector Installation Checklist

• Confirm exact connector manufacturer and model
• Verify permitted mating combination
• Check DC voltage and current ratings
• Confirm conductor cross-section
• Confirm cable insulation diameter
• Use approved crimping tools and dies
• Apply the manufacturer’s stripping dimensions
• Verify correct polarity
• Check contact retention and assembly
• Confirm environmental sealing
• Follow the manufacturer’s inspection instructions

Manufacturer reference: SUNTREE Solar Connector Product Range

3Buy Solar product: SUNTREE 4–6mm² PV Connector Pair

SUNTREE Protection for Solar Batteries & Energy Storage Systems

Battery energy storage systems introduce electrical protection requirements that differ from conventional photovoltaic strings.

Low-voltage batteries can produce high DC currents, while high-voltage battery systems create additional insulation, disconnection and fault-interruption requirements.

SUNTREE develops protection components for battery energy storage applications, including DC circuit breakers, fuses, switching devices and associated electrical equipment.

Low-Voltage Solar Battery Protection

For a nominal 51.2V LiFePO4 battery installation, protection must be designed around the battery’s maximum charging and discharging current and prospective fault current.

For example:

A battery system delivering 10kW at 51.2V nominal voltage requires approximately 195A of DC current before conversion losses.

Actual current changes with battery voltage and operating conditions.

This illustrates why battery protection equipment must be selected using electrical calculations rather than battery capacity alone.

High-Voltage Battery Energy Storage

Commercial and residential high-voltage solar batteries require equipment suitable for the actual battery voltage and protection architecture.

Depending on the manufacturer, protection may be integrated within the battery system or require additional external components.

ESS Protection Procurement Checklist

Professional buyers should confirm:

• Battery voltage range
• Maximum charge/discharge current
• Maximum prospective fault current
• Required protection function
• DC switching capability
• Fuse or breaker operating class
• DC breaking capacity
• BMS and contactor architecture
• Cable and busbar ratings
• Isolation requirements
• Installation environment
• Manufacturer approval of the protection arrangement

Battery protection must follow the battery manufacturer’s system design requirements.

Browse related Battery Protection Components for Solar ESS and Solar Batteries & Energy Storage Systems.

SUNTREE Electrical Protection for Complete Solar PV Kits

A complete solar PV kit requires more than solar panels and an inverter.

For professional installations, the electrical balance of system must be specified alongside the main power-generating equipment.

Typical Electrical Protection Components

A project may require:

• PV string cables
• Compatible PV connectors
• DC isolator switches
• gPV string fuses where required
• DC surge protective devices
• AC surge protection
• AC circuit breakers
• AC disconnect switches
• Appropriate RCD/RCBO devices
• Combiner boxes
• Battery fuses and disconnectors
• Earthing and bonding components
• Cable glands and terminals
• Electrical enclosures
• Warning and circuit labels

Not every component is required in every installation.

The appropriate equipment depends on whether the system is grid-connected, hybrid, off-grid, single-phase, three-phase or commercially configured.

Complete Kit Procurement from 3Buy Solar

Professional buyers can source related equipment through:

• Solar PV Complete Kits
• Solar Panels
• Hybrid Solar Inverters
• Solar Batteries
• Solar Cables & Wiring
• Solar PV Protection & Disconnectors
• Solar PV & ESS Combiner Boxes

3Buy Solar supplies products from multiple manufacturers, and the exact brand and model of each protection component should be confirmed during kit specification.

SUNTREE for Residential, Commercial & Industrial Solar Installations

Residential Rooftop Solar PV

Residential photovoltaic systems require correctly selected DC wiring, connectors, inverter isolation and AC-side electrical protection.

SUNTREE’s electrical equipment portfolio is relevant to suitable residential PV protection and wiring designs.

Commercial Solar PV Projects

Larger rooftop installations may use multiple PV strings, commercial inverters, longer cable runs and more extensive electrical distribution.

For these projects, combiner boxes, surge protection and appropriate AC/DC isolation become important parts of the procurement package.

Industrial PV Installations

Industrial installations may require larger circuit capacities, higher prospective fault-current withstand and more complex coordination with the site’s electrical distribution system.

The choice of MCCB, fuse, isolator and surge protection must reflect the project engineering.

Solar Battery & Hybrid Inverter Systems

Hybrid systems include both photovoltaic DC circuits and battery energy storage connections.

The protection strategy must distinguish the solar PV inputs, battery connections and AC power circuits.

Off-Grid Solar Systems

Off-grid installations may include PV charge controllers, low-voltage battery banks, generator inputs and inverter/charger equipment.

Correct DC protection is particularly important where battery banks can produce high short-circuit currents.

Commercial Rooftop Maintenance & Retrofits

Replacement protection equipment should be selected by exact electrical characteristics and product compatibility, rather than physical appearance alone.

This is especially important when replacing older DC isolators, fuse holders or surge protection modules.

SUNTREE Technical Documentation, CE & European Electrical Standards

Professional solar installers and procurement teams should request the applicable documentation for every safety-critical electrical component.

SUNTREE publishes manufacturer catalogues, product data, technical selection manuals and certificates through its official website.

Official SUNTREE Manufacturer Resources

SUNTREE Electric Group – Official Website

Manufacturer information covering solar PV protection, electrical distribution and related energy equipment.

SUNTREE – Product Data Download Centre

Product catalogues and technical resources, including:

• 1500V DC protection equipment
• Energy storage protection
• DC circuit breakers
• DC isolator equipment
• Solar combiner boxes

SUNTREE – Product Model Selection Manuals

Technical selection documentation for the manufacturer’s electrical equipment families.

SUNTREE – Certificates & Technical Approvals

Manufacturer-published product certificates covering selected switches, breakers, SPDs, PV cables, fuse products, combiner boxes and rapid shutdown equipment.

European Standards & Product Selection

Depending on the electrical component, relevant standards may include:

The applicable edition, European adoption and national requirements must be checked for the destination country and project.

CE Marking & Manufacturer Certificates

A product’s CE marking is not the same as an independent TÜV certificate.

For procurement, installers should identify which documents are actually required:

• EU Declaration of Conformity
• Applicable product test certificates
• Technical datasheet
• Installation instructions
• Relevant IEC/EN standards
• Product-specific certification
• Country-specific approvals where applicable

Certification for one SUNTREE product model should not automatically be assumed to cover another product from the same family.

SUNTREE Installer Training – 3Buy Solar YouTube & Technical Resources

Correct electrical protection is essential for professional solar PV installation.

A solar system may use a high-quality solar inverter, solar panels and battery storage while still being vulnerable to failures caused by incorrect electrical protection, unsuitable connectors or poorly installed cables.

The 3Buy Solar YouTube Training & Technical Support Channel provides technical tutorials and installation resources covering solar PV equipment, inverter installation, battery storage and associated electrical systems.

Technical Training Topics

Our resources are relevant to professional installers working with:

• Solar PV installation
• Hybrid and grid-connected inverters
• Solar battery integration
• Electrical connection methods
• PV commissioning
• Equipment monitoring
• Energy storage architecture
• Installation troubleshooting
• Technical product demonstrations

Official SUNTREE Manufacturer Videos

For manufacturer-specific electrical equipment information, consult the SUNTREE Official Technical Video Library.

This resource provides manufacturer video material related to its electrical equipment portfolio.

3Buy Solar Installer Training Academy

Professional installers can also visit our 3Buy Solar Installer Training & Webinar Academy.

The academy provides educational resources relevant to photovoltaic installation, electrical equipment, energy storage and commissioning.

Training videos do not replace the current manufacturer installation instructions or the electrical testing required before commissioning.

Why Professional Solar Installers Choose SUNTREE Electrical Components

SUNTREE offers a wide range of electrical equipment used in the design and assembly of solar PV installations.

For installers and system integrators, several practical factors make the manufacturer relevant to professional procurement.

Broad Electrical Product Portfolio

SUNTREE manufactures multiple categories of DC and AC protection equipment, helping technical buyers identify components for different parts of an electrical installation.

PV-Specific DC Equipment

The manufacturer develops DC isolators, surge protection, fuses and combiner boxes intended for photovoltaic applications.

Different Voltage Classes

Products are available for different DC and AC voltage requirements, including specified 1000V and 1500V PV applications.

Residential & Commercial Applications

The product portfolio covers equipment relevant to both small rooftop systems and larger commercial installations.

Electrical Distribution Components

SUNTREE also manufactures equipment beyond photovoltaic strings, including AC protection and switching devices.

Manufacturer Technical Documentation

Datasheets, model selection resources and applicable product certificates support technical product identification.

For professional buyers, the key is selecting the correct certified device for the circuit, not simply purchasing all protection equipment from the same brand.

Why Buy SUNTREE Solar Cables & Electrical Components from 3Buy Solar?

3Buy Solar is a European B2B solar PV supplier, solar distributor and solar wholesaler, supporting professional solar installers, qualified electricians, EPC contractors, resellers and technical procurement teams.

Our approach combines photovoltaic components, energy storage equipment and professional sourcing support in one multibrand procurement platform.

Direct Product Purchasing

Our current SUNTREE-related shop listings include PV connector pairs, pre-assembled solar cable sets and selectable solar DC cable products.

European B2B Procurement

Approved trade customers can access professional purchasing conditions and submit larger order enquiries.

Bulk Cable & Connector Supply

For installers requiring recurring quantities of solar cables, connector pairs or pre-assembled cable sets, purchasing can be planned around installation schedules and required volumes.

Electrical Protection Enquiries

For SUNTREE DC isolators, SPDs, fuse protection, circuit breakers and combiner boxes not currently listed for direct purchase, buyers can submit model-specific sourcing enquiries.

Related Components in One Solar Webshop

Our wider catalogue includes:

• Solar panels
• Solar inverters
• Hybrid inverters
• Solar batteries
• Commercial energy storage
• PV wiring
• Electrical protection components
• Complete solar kits
• Installation accessories

Technical Documentation

Product-specific pages provide technical information and available manufacturer documents to support purchasing decisions.

Installer Training & Resources

3Buy Solar’s YouTube channel and training academy provide additional resources for professional photovoltaic and battery storage installations.

European Logistics

3Buy Solar supports European supply and delivery arrangements for qualifying orders, subject to confirmed availability, transport conditions and order quantities.

For recurring installer procurement, project quotations or electrical BOS packages, contact our B2B sales team.

SUNTREE B2B Procurement Checklist – Request the Correct Electrical Components

For an accurate technical quotation, provide the information relevant to the products required.

DC Isolators

• Manufacturer model or required type
• DC operating voltage
• Rated current
• Number of poles
• Utilisation category
• Enclosure protection rating
• Required quantity

DC Surge Protection

• PV system maximum voltage
• Required SPD type
• Ucpv rating
• Required discharge ratings
• Protection level
• Earthing arrangement
• Installation location
• Applicable project standard

PV Fuses & Fuse Holders

• Fuse operating class
• Rated DC voltage
• Rated current
• Breaking capacity
• Physical dimensions
• Matching fuse holder
• Quantity

Solar PV Cables

• Required cable manufacturer
• Cable cross-section
• Cable type
• Rated voltage
• Colour
• Reel length or cut length
• Applicable certification
• Required quantity

Solar Connectors

• Exact connector model
• Intended mating connector
• Cable conductor size
• Cable insulation diameter
• Required voltage and current
• Connector quantity
• Approved assembly tools

Combiner Boxes

• Number of PV string inputs
• Number of outputs
• DC operating voltage
• Maximum string current
• Required fuses
• Required SPD protection
• DC disconnection requirements
• Enclosure rating
• Monitoring requirements

Project & Logistics

• Destination country
• Installation type
• Inverter model
• PV module specification
• Required certification documents
• Order quantity
• Delivery location
• Requested delivery period

For larger projects, include the preliminary single-line electrical diagram or equipment bill of materials.

Request a SUNTREE B2B Quotation – Contact 3Buy Solar

Frequently Asked Questions About SUNTREE Solar Electrical Components

What is SUNTREE?

SUNTREE Electric Group is a manufacturer of electrical equipment, including solar PV DC protection devices, isolator switches, circuit breakers, surge protective devices, photovoltaic fuses, combiner boxes, solar cables and connectors.

What SUNTREE products can I buy at 3Buy Solar?

The current SUNTREE brand archive lists photovoltaic connector pairs, 6mm² pre-assembled solar cable sets and 10mm² cable products with selectable manufacturers. Other SUNTREE electrical protection products can be discussed through a project sourcing enquiry.

Does SUNTREE manufacture solar DC isolators?

Yes. SUNTREE manufactures DC isolator switches for photovoltaic circuits, including equipment in different voltage and current classes. The selected product must have the appropriate DC switching ratings for the installation.

Does SUNTREE offer 1500V DC protection equipment?

Yes. The manufacturer’s portfolio includes selected 1500V DC protection products. Each device must be checked for its exact rated voltage, current, interruption capability and permitted application.

What is the difference between a DC isolator and a DC circuit breaker?

A DC isolator provides disconnection of the appropriate circuit according to its rated switching duty. A DC circuit breaker provides specified overcurrent and fault-interruption functions. They cannot automatically replace one another.

Does SUNTREE manufacture solar surge protection devices?

Yes. SUNTREE manufactures DC surge protective devices, including Type 2 and combined Type 1+2 configurations for specified photovoltaic applications.

What is the difference between Type 1+2 and Type 2 SPD?

Type 2 devices are generally associated with limiting induced or switching-related transients. Combined Type 1+2 devices also provide Type 1 lightning-current handling capability where required. The correct device depends on the project’s lightning and surge protection assessment.

What is a gPV fuse?

A gPV fuse is a fuse designed for photovoltaic circuit protection under the applicable IEC 60269-6 requirements. It is intended to interrupt specified PV fault currents, including relevant reverse-current conditions.

Are photovoltaic fuses required on every solar panel string?

No. The requirement depends on string configuration, the potential reverse fault current and the module manufacturer’s maximum series fuse rating.

Does SUNTREE manufacture solar combiner boxes?

Yes. SUNTREE produces PV combiner boxes with different input and output configurations. Selected models can incorporate string fuses, surge protection and DC isolation.

What is the difference between SUNTREE 1000V and 1500V PV connectors?

The voltage classification identifies the maximum rated voltage for the specified connector model. The correct selection depends on the photovoltaic system’s maximum voltage and the connector’s approved electrical and mechanical characteristics.

Are SUNTREE MC4 connectors compatible with original Stäubli MC4 connectors?

Physical mating is not proof of certified compatibility. Installers must verify the approved mating combination and applicable connector documentation. Different manufacturer connectors should not be mixed solely because they are described as MC4-compatible.

Can SUNTREE solar cables be used with hybrid inverters?

Suitable photovoltaic DC cables can be used between solar panels and the PV inputs of compatible hybrid inverters. Cable type, voltage rating, current capacity, installation conditions and connector compatibility must be verified.

Is 10mm² solar cable better than 6mm²?

Not necessarily. A larger conductor offers lower resistance at the same material and length, but correct cable selection depends on current, route length, temperature, installation method and voltage drop.

What is H1Z2Z2-K solar cable?

H1Z2Z2-K is a photovoltaic cable designation associated with EN 50618. It is commonly specified for suitable outdoor DC solar wiring applications.

Does SUNTREE manufacture battery protection equipment?

Yes. SUNTREE’s wider product portfolio includes electrical protection equipment for energy storage applications. The selected device must be suitable for the battery voltage, current and prospective fault conditions.

Can SUNTREE DC isolators be used as firefighter rapid shutdown switches?

A conventional DC isolator does not automatically provide the same functionality as a rapid shutdown device. The required shutdown behaviour must be matched to the manufacturer’s specific equipment and the applicable installation requirements.

Where can I download SUNTREE certificates and technical datasheets?

SUNTREE publishes product information through its official technical download centre and manufacturer certificate directory. Buyers should select documents matching the exact model.

Where can professional installers buy SUNTREE in Europe?

Professional installers, EPC contractors, resellers and approved B2B buyers can purchase selected SUNTREE photovoltaic cables and connectors through 3Buy Solar. For additional DC protection, surge protection and combiner box equipment, contact our procurement team with the required model specifications and quantities.

Source SUNTREE Solar Cables, DC Protection & Combiner Boxes from 3Buy Solar

SUNTREE supplies electrical components relevant to professional photovoltaic installation, from solar cables and connectors to DC isolation, surge protection, overcurrent protection and electrical distribution.

At 3Buy Solar, we help European installers, electricians, EPC contractors and resellers identify the correct products for solar PV wiring, inverter connections and complete electrical balance-of-system procurement.

Browse the SUNTREE products listed on this page, review the technical specifications and confirm the correct manufacturer configuration before ordering.

For larger quantities, PV protection equipment, combiner boxes or project-based electrical packages, contact 3Buy Solar for a SUNTREE B2B quotation.

3Buy Solar – Your European B2B Partner for SUNTREE Solar Cables, PV Protection & Electrical Components.