Residential Solar PV
Rooftop photovoltaic systems and small distributed-generation projects where compact, weather-resistant PV connections are required.
Rooftop PVDistributed PVModule connection
Solar PV applications · connection solutions
PV Connection Solutions for Different Solar Applications
Treasol manufactures photovoltaic connectors and related PV connection products for residential rooftop solar, commercial and industrial PV, utility-scale solar, solar module manufacturing and customized OEM applications.
15+ yearsPV manufacturing experience
100+ modelsPV connection product models
Up to 1500 V DCselected product options
50+ countriesregions supplied
Application overview
Where PV connectors are used in a solar system
Different solar projects place different demands on the connection system. Treasol's product portfolio covers cable-to-cable connections, module-side connections, PV circuit protection, module junctions and pre-assembled cable solutions.
Commercial & Industrial PV
Commercial rooftops, factories and larger distributed systems using PV strings and longer cable runs with project-specific electrical requirements.
C&I rooftopIndustrial PVPV stringsUtility-Scale Solar
Large solar farms and utility-scale PV systems where connector selection, current capacity, cable compatibility, protection and installation consistency are critical.
Solar farmsHigh-voltage PVString connectionSolar Module Manufacturing
Module-side connection requirements involving panel connectors, PV junction boxes and specified connection assemblies.
PV modulesJunction boxesOEMOEM Solar Equipment
Customized connector configurations, cable assemblies, wiring harnesses, labeling and packaging for solar equipment manufacturers and project buyers.
OEMCable assemblyHarnessPV-to-Storage Integration
PV-side connection requirements in renewable-energy and energy-storage integration projects, where the selected connector must match the electrical and environmental requirements of the PV circuit.
PV-to-storageDC connectionProject-specific
Application → product mapping
Match the PV connection product to the job
Use the application as the starting point, then verify the exact product datasheet, electrical rating, cable size, connector combination and certification.
PV cable connection
For cable-to-cable and string-level PV connections.
- CN4U-C — up to 1500 V DC, up to 70 A, IP68; supports 2.5–16 mm² solar cables.
- Suitable application contexts: residential, commercial/industrial and utility-scale PV, subject to the specified system requirements.
Solar panel / module connection
For module-side PV connection applications.
- CN4U-P — up to 1500 V DC, up to 52 A, IP68.
- Use the product datasheet to confirm cable, mating and certification requirements for the specific module or project.
PV circuit protection
For applications requiring integrated PV fuse protection.
- F4C series — solar fuse connector options including F4C-200-1085, F4C-212-1038 and F4C-201-1085.
- F4C-200-1085 supports 1–30 A fuse ratings; the final fuse selection must follow the PV system design and applicable requirements.
PV diode connection
For PV applications requiring diode-based electrical control or protection.
- D4A / D4B — PV diode connector models with model-specific electrical and environmental ratings.
- Confirm voltage, current, pin size and certification for the selected model before installation.
PV module junction
For electrical junctions integrated into photovoltaic modules.
- JT3 / JT3-abcd / JB2 — PV junction box options for module applications.
- Product selection depends on module design, conductor specification, current/voltage rating and installation process.
Pre-assembled PV connection
For projects that require prepared cable assemblies or wiring harnesses.
- HTX wiring harness series — pre-assembled PV connection solutions for specified cable and connector configurations.
- Custom lengths, connector configurations and OEM requirements can be discussed with Treasol.
Product selection
PV connector selection should follow the system requirements
A connector that physically fits is not automatically a certified or approved connection. For project selection, verify the complete electrical and mechanical interface.
| What to check | Why it matters | Information to provide Treasol |
|---|---|---|
| System voltage | The connector voltage rating must be appropriate for the PV circuit. | 1000 V or 1500 V DC system requirement |
| Current rating | The connector must match the current requirements of the circuit and selected cable. | Rated current / operating current |
| PV cable size | Crimp and contact geometry depend on the specified cable and conductor size. | mm² or AWG cable size |
| Mating connector | Physical fit alone does not establish electrical, mechanical or certification compatibility. | Manufacturer, model and connector combination |
| Environmental conditions | Outdoor PV connections are exposed to UV, moisture and temperature cycling. | IP requirement and operating environment |
| Certification | Project and market requirements can differ by product and application. | TÜV / UL / CE / RoHS or other required documentation |
Important: Product specifications and certifications vary by model. Always use the individual product datasheet and applicable certificate for final project selection.
From application to supply
A practical workflow for PV connector buyers
For EPCs, installers, distributors, module manufacturers and OEM customers, the fastest route to the correct product is to define the application first and the connector model second.
01 · APPLICATION
Define the use
Residential, C&I, utility-scale, module manufacturing, OEM or PV-to-storage integration.
02 · ELECTRICAL
Define ratings
Provide system voltage, current, cable size and any fuse or diode requirement.
03 · INTERFACE
Verify mating
Confirm the connector manufacturer, model and approved mating combination.
04 · DOCUMENTS
Check evidence
Review the applicable datasheet, certification and project requirements.
05 · SUPPLY
Sample or order
Request samples, quantity, OEM requirements and production details as needed.
Technical knowledge
Why connector selection matters in PV systems
PV connectors are part of a DC electrical circuit. The connection interface affects electrical continuity, mechanical retention and environmental protection. For this reason, selection should consider the complete connector system rather than appearance or physical fit alone.
Electrical interface
Verify voltage, current, contact resistance, conductor size and the applicable product rating.
Mechanical interface
Confirm locking, crimping, insertion/withdrawal requirements and the approved mating combination.
Environmental protection
For outdoor PV installations, verify the specified IP rating, temperature range, UV resistance and installation conditions.
Frequently asked questions
Solar PV application & connector questions
What types of solar PV applications are Treasol connectors used for?
Treasol supplies PV connection products for residential rooftop systems, commercial and industrial PV, utility-scale solar, solar module manufacturing, OEM applications and selected PV-to-storage integration projects where the product ratings and system requirements are applicable.
Which Treasol products are used for residential rooftop solar?
Depending on the system design, residential projects can use solar cable connectors such as CN4U-C, panel-side connectors such as CN4U-P, and other applicable branch, fuse, diode, junction-box and wiring-harness products.
Which products are relevant to utility-scale solar plants?
Utility-scale projects can use applicable PV cable connectors, panel connectors, branch connectors, fuse connectors, diode connectors and pre-assembled wiring harnesses. The exact model should be selected according to system voltage, current, cable size, connector combination, certification and project requirements.
Can Treasol provide PV connection products for solar module manufacturers?
Yes. Treasol supplies solar panel connectors, PV junction boxes and customized cable or wiring harness assemblies for solar module manufacturing and OEM requirements, subject to the applicable product specifications.
Are Treasol MC4-compatible connectors suitable for every MC4-type connector from another manufacturer?
No. Physical fit alone does not establish compatibility. Electrical ratings, mechanical locking, contact design and certification requirements must be verified. Treasol recommends approved matched connector combinations and confirmation for the specific application.
What information should I provide when requesting a PV connector?
Please provide the application, connector type, system voltage, rated current, PV cable size, required certification, connector mating requirements, estimated quantity and any OEM or branding requirements.
Related reading
Project inquiry
Need help selecting a PV connector for your application?
Send us the application, system voltage, current, cable size, connector model, required certification and estimated quantity. Treasol can then identify the applicable product options and provide the relevant technical documentation.