QC Solar Corporation

What QC Solar Corporation does

QC Solar Corporation is a Chinese high-tech manufacturer specializing in photovoltaic electrical connection and intelligent protection components for solar energy and energy storage systems. Founded in 2004 and publicly listed on the Shenzhen Stock Exchange (stock code 301278), the company designs and produces PV junction boxes (including the 3Qxy series and smart junction boxes), solar connectors (QC4.10 series), PV and energy storage cables, cable harnesses, microinverters, combiner boxes, and home battery storage solutions. Its products carry TÜV SÜD, TUV, UL, and IEC certifications, with IP67-rated outdoor waterproof designs supporting utility-scale, commercial, industrial, and rooftop solar deployments.

The company operates five manufacturing facilities across Suzhou, Huai'an, and Nantong in China plus one in Vietnam, spanning 120,000+ square meters and equipped with 80 automated injection machines, 46 assembly test lines, and 26 automated wiring harness production lines imported from Switzerland and Japan. QC Solar generates revenue through hardware sales of these components via a dual-channel model: direct international sales to enterprise solar installers, BESS providers, and EV charging operators, alongside a global distributor network serving mid-market resellers across 60+ countries. Pricing is quote-based with multi-year contracts, and the company has been actively expanding its product portfolio into energy storage, EV connectivity, robotics cables, and module-level intelligent monitoring solutions, as evidenced by 2026 product launches including a 30A smart rapid shutdown device and TÜV SÜD-certified 40A junction box.

Name

QC Solar Corporation

Legal name

QC Solar Corporation

Website

https://qc-solar.com

Company type

Public

Founded year

2004

Operating status

Operating

Headcount range

11–50 employees

Short description

QC Solar Corporation is a Chinese publicly listed manufacturer (SZSE: 301278) of photovoltaic electrical components, including junction boxes, connectors, cables, and smart monitoring solutions, serving solar installers, BESS providers, and EV charging operators across 60+ countries via direct sales and a global distributor network.

Ownership category

akta.pro rank

Product category

Photovoltaic Electrical Components

NAICS

Electronic Connector Manufacturing (334417), Current-Carrying Wiring Device Manufacturing (335931), Other Electrical Equipment and Component Manufacturing (3359), Semiconductor and Related Device Manufacturing (334413)

SIC

Electronic Components & Accessories (3670), Electronic Connectors (3678), Electronic & Other Electrical Equipment (No Computer Equip) (3600)

akta.pro primary industry

Solar Plant Components Supply & Manufacturing (Modules, Cells, Wafers, Mirrors, Heliostats) (EUACAGAK)

akta.pro secondary industry

Solar Inverters, Power Optimizers & MLPE Manufacturing (EUAMAHAB)

Keywords

• Photovoltaic junction boxes
• PV connector systems
• Solar PV cables
• Energy storage components
• PV microinverter products

Headquarters

HQ city

Suzhou

HQ country

China

HQ region

Asia

Offices5 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Personnel, Technology or R&D, Infrastructure, Marketing or Sales

Revenue model

1. PV Component Sales: Sale of photovoltaic components including junction boxes, connectors, cables, and cable harnesses to solar installers, energy storage system integrators, and module manufacturers
2. Smart Energy Storage Solutions: Sales of smart PV modules, home battery storage, and intelligent protection solutions for residential and commercial energy storage applications
3. Custom Wiring Harness Solutions: Custom cable and wiring harness solutions designed for BESS and C&I energy storage projects

Pricing tiers

Go-to-market motion2 records

Distribution channels2 records

Marketing channels5 records

Core offering

QC Solar manufactures and sells photovoltaic electrical connection and protection hardware, including PV junction boxes (3Qxy series and smart variants), QC4.10 series connectors, application-specific cables (PV, energy storage, EV, robotics), pre-assembled cable harnesses, PV microinverters, combiner boxes, home battery storage systems, and power semiconductor modules. Products are sold to solar installers, module manufacturers, energy storage system integrators, and EV charging infrastructure operators across 60+ countries via direct sales and a global distributor network.

Product overview

QC Solar Corporation is a comprehensive high-tech enterprise specializing in research & development, production, and sales of photovoltaic (PV) connection and electrical protection solutions. The product portfolio consists of hardware components including: PV junction boxes (3Qxy series with Smart Junction Box variants), connectors (QC4.10 series for Solar PV and Energy Storage/EV applications), cables (Solar, Energy Storage, EV, and Robotics cables), cable harnesses (pre-assembled wiring solutions), PV microinverters, PV combiner boxes, home battery storage systems, power semiconductor modules, and data computing connection solutions. The company operates five production factories worldwide (two in Suzhou, one in Huai'an, one in Nantong, and one in Vietnam) with 80 automatic injection machines, 46 assembly test lines, and 26 automatic wiring harness production lines. Products serve solar energy, energy storage systems, electric vehicle charging, and robotics applications across 60+ countries.

Differentiator

Problem solved

Functional benefit

Brands

• 3Qxy Series PV Junction Box: Series of PV junction boxes including 3Q-E and integration variants
• QC4.10 Connector
• Smart Junction Box
• Iqcsmart

Products and services

• PV Junction Boxes (3Qxy Series and General)
• Smart Junction Boxes
• PV Connectors (QC4.10 Series)
• Energy Storage Connectors
• EV Connectors
• PV Cables (Solar Cables)
• Energy Storage Cables
• EV Cables
• Robotics Cables
• Cable Harnesses (Solar, Energy Storage, and EV variants)
• PV Microinverters
• PV Combiner Boxes and Cabinets
• Home Battery Storage
• Power Semiconductor Modules
• Data Computing Connection Solutions
• PV Installation Tools
• Smart Rapid Shutdown Device

Quantifiable outcome

• TÜV SÜD certified junction boxes meeting international safety and reliability standards
• +2 more outcomes

Named customers3 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Scale indicators8 records

Recent moves8 records

Expansion highlights5 records

Direct peers

• APsystems: Global microinverter and MLPE manufacturer with overlapping rapid-shutdown and module-level electronics products; competes with QC Solar's growing smart/MLPE portfolio.
• Hosiden Corporation: Japanese electronics manufacturer with a large PV connector and cable business supplying major module makers; directly competes with QC Solar in junction-box-adjacent connectors and module-side wiring.
• Enphase Energy: U.S. leader in module-level microinverters and energy storage; directly competes with QC Solar's PV microinverter line and increasingly with its smart/MLPE rapid-shutdown junction box business.
• Stäubli Electrical Connectors: Stäubli (through its Multi-Contact / MC4 line) is the global benchmark for PV connectors and the de facto standard at Tier 1 module makers; competes head-on with QC Solar's QC4.10 series in the same customer base.
• Sumitomo Electric Industries: Japanese cable and harness manufacturer with a strong PV/DC cable and wiring-harness portfolio that directly competes with QC Solar's PV and energy-storage cable lines.
• Tonglin Electric (002338.SZ): Major Chinese PV junction box and connector manufacturer listed on the Shenzhen Stock Exchange; closest direct competitor to QC Solar in junction boxes, connectors and wiring harnesses for solar modules.
• Sunter (中国舜天): Established Chinese supplier of PV junction boxes, connectors and cables with comparable product mix to QC Solar, competing for the same downstream module and installer customers, especially in domestic China and emerging export markets.

Broad incumbents

• Eaton: Large electrical equipment manufacturer whose combiner boxes, switchgear and power-conversion products overlap with QC Solar's PV combiner box/cabinet and power semiconductor modules, as part of a broad industrial electrical portfolio.
• TE Connectivity: Global connector and sensor giant whose Solarlok and broader energy-connectivity lines overlap with QC Solar's connector, junction-box and harness offerings, but as part of a much wider industrial portfolio.
• Amphenol: Diversified interconnect specialist with PV (Helios) and energy-storage connector lines that overlap with QC Solar's QC4.10 and energy-storage connector SKUs, but Amphenol serves many end markets beyond solar.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/quick-contact

Compliance6 records

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries4 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about QC Solar Corporation