Name

Tongtai Technology

Legal name

Suzhou UKT New Energy Technology Co., Ltd.

Website

https://uktr.com.cn

Company type

Private

Founded year

2013

Operating status

Operating

Ownership category

akta.pro rank

Product category

Photovoltaic Components

NAICS

Electronic Connector Manufacturing (334417), Semiconductor and Related Device Manufacturing (334413), Current-Carrying Wiring Device Manufacturing (335931), Relay and Industrial Control Manufacturing (335314)

SIC

Electronic Connectors (3678), Electrical Industrial Apparatus (3620), Semiconductors & Related Devices (3674)

akta.pro primary industry

Wiring Devices & Receptacles (switches, sockets, plugs, industrial outlets, pin & sleeve) (IMAGAEAF)

akta.pro secondary industries

Power Modules (IGBT/MOSFET/SiC/GaN Modules) (HDAHAHAH), Solar PV Module & Cell Manufacturing (Crystalline, Thin-Film) (EUAMAHAA)

Keywords

• Photovoltaic junction boxes
• Solar module connectors
• Bypass diode modules
• PV rapid shutdown controllers
• Module-level power optimizers

Headquarters

HQ city

Suzhou

HQ country

China

HQ region

Asia

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Semiconductor Diode Modules: Monthly production capacity of 50 million units (10GW) of photovoltaic semiconductor power modules. Revenue from sale of integrated bypass diode modules used in PV junction boxes.
2. Photovoltaal Junction Boxes: Monthly production capacity of 7 million sets (4GW) of PV junction boxes. Primary product category sold to PV module manufacturers. Models include PV-JB03, PV-JB04, PV-JB06, PV-JB12, PV-JB12x Plus, PV-JB03D.
3. Photovoltaic Connectors: Monthly production capacity of 7 million sets (4GW) of PV connectors. Products include PV-CO02 and PV-CNT03 connectors, sold alongside junction boxes to module manufacturers.
4. Module-Level Smart Electronics: Module-level smart controllers, optimizers, string current monitors, and base stations for PV system monitoring and safety. Sold as add-on products to enhance PV system performance and safety.

Go-to-market motion2 records

Distribution channels1 record

Marketing channels3 records

Core offering

Tongtai Technology designs and manufactures integrated bypass diode photovoltaic junction boxes (Reliable-Box® series) for PV modules, along with complementary PV connectors and module-level smart electronics including rapid shutdown controllers, MPPT optimizers, string current monitors, and base stations. The company is the world's first to achieve large-scale mass production of integrated PV semiconductor diode modules, junction boxes, and connectors, with monthly capacity of 50 million diode modules (10GW), 7 million junction boxes (4GW), and 7 million connectors (4GW).

Product overview

Tongtai Technology (苏州同泰新能源科技股份有限公司 / Suzhou UKT) provides an integrated product portfolio for photovoltaic connection protection and smart solar energy management. The core offering is the Reliable-Box® series of bypass diode-integrated module junction boxes (PV-JB03, PV-JB04, PV-JB06, PV-JB12, PV-JB12x Plus, PV-JB03D) available in current ratings from 15A to 35A. This is complemented by smart electronic modules including the Module-Level Smart Controller (UTRSD04A) for rapid shutdown and safety, the Module-Level Smart Optimizer (UTOPT03A) for MPPT power optimization, the UTBST02 base station for data communication, and the UTCMO01A string current monitor for monitoring. PV connectors (PV-CNT03 rated 45A, PV-CO02 with ratchet anti-loosening rated 30A) complete the system. The portfolio enables comprehensive PV system protection, monitoring, and optimization from module-level to string-level management.

Differentiator

Problem solved

Functional benefit

Brands

• Reliable-Box: Proprietary brand for integrated module photovoltaic junction boxes, UV and UL certified.

Products and services

• Reliable-Box® Integrated Module Photovoltaic Junction Box The company's flagship brand of bypass diode-integrated junction boxes for photovoltaic modules. Features module packaging with low junction temperature, medium-frequency welding for low resistance, and strong instantaneous reverse bias bearing capacity. Available in multiple series (PV-JB03, PV-JB04, PV-JB06, PV-JB12, PV-JB12x Plus, PV-JB03D) rated for currents from 15A to 35A and voltages up to 2000V. Sold to PV module manufacturers.
• Module-Level Smart Controller (UTRSD04A) Safety device providing rapid shutdown (<10 seconds) for distributed PV systems, component-level voltage/current/temperature monitoring, overvoltage/over-temperature/reverse current protection, and wireless mesh networking for smart energy management platform integration. NEC 2020 690.12 compliant.
• Module-Level Smart Optimizer (UTOPT03A) Power optimization device with real-time MPPT tracking achieving up to 99.5% peak efficiency. Provides overvoltage/over-temperature/overcurrent protection, component-level monitoring with fault diagnostics, and adaptive optimization/pass-through mode switching for different PV scenarios.
• UTBST02 Base Station Data acquisition and transmission hub for PV system monitoring. Features PoE power supply, 1600-node capacity at 1Hz, dual watchdog design for reliability, TCP/IP protocol support, and multi-mode networking combining ad-hoc and cellular networks.
• PV String Current Monitor (UTCMO01A) String-level data collection device for real-time current monitoring, reverse current detection, and power generation statistics. Supports both built-in (±30A) and external sensors (±50A), 2.4G wireless networking with 100m+ line-of-sight communication distance.
• PV-CNT03 Photovoltaic Connector High-reliability PV connector rated at 45A/DC 1500V with low mechanical stress design, strong current-carrying part retention, unique pin structure for stable electrical connection, and anti-corrosion enclosure preventing ketone-oxime induced cracking. UL94-V0 flame class rated.
• PV-CO02 Connector PV connector with ratchet anti-loosening mechanism preventing accidental disconnection. Features stress-free interlocking structure and MC4 compatibility. Rated 30A/1500VDC with IP68 protection and ≤0.3mΩ contact resistance.
• PV-JB12x Plus Junction Box Advanced narrow-structure junction box with asymmetric module design for balanced heat generation. Rated 18A-35A current, suitable for 2000V system voltage and high-altitude environments. Compatible with mainstream market components and connectors including PV-CO02, PV-CNT03, MC4, EVO2.
• PV-JB03D Junction Box Single-diode junction box designed for high-voltage large-power modules or small modules. Designated model for Sunpower modules. Operating temperature range -40°C~85°C with ≤9mΩ resistance.
• 30A Triple-Split Junction Box for Large-Wafer PV Modules 30A-rated triple-split photovoltaic junction box specifically designed for 166/210mm large-wafer high-current PV modules including TOPCon, HIT, and bifacial modules. World's first DEKRA Seal certified for this rating, meeting IEC 62790:2014 standard.

Quantifiable outcome

• Achieves sub-10-second rapid shutdown vs. regulatory requirement of 30 seconds
• +3 more outcomes

Named customers1 record

Segments2 records

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability4 records

Feature6 records

Partnerships

One partnership is on record.

• Shanghai Jiao Tong University Solar Research Institute (上海交大太阳能研究所)coreStrategic or Co-development Partner · 1 January 2013R&D partnership with Shanghai Jiao Tong University Solar Research Institute providing strong technical research support for the development of photovoltaic bypass integrated module junction boxes (Reliable-Box). The company leverages the institute's academic research capabilities in conjunction with its own product development team.

Scale indicators8 records

Recent moves7 records

Expansion highlights4 records

Emerging players

• APsystems: Module-level microinverter and optimizer manufacturer with growing presence in distributed PV markets. Overlaps with Tongtai's module-level smart electronics portfolio, though focused primarily on microinverter-based solutions rather than optimizer-only designs.

Direct peers

• Tigo Energy: US-based specialist in module-level power electronics including optimizers, rapid shutdown devices, and monitoring systems. Direct competitor to Tongtai's smart controller and optimizer products in the module-level electronics segment.
• Enphase Energy: US-headquartered leader in module-level microinverters and energy systems. Overlaps with Tongtai's module-level smart electronics offering, particularly in distributed PV applications where rapid shutdown and module-level monitoring are required by NEC 690.12.
• SolarEdge Technologies: Israeli-headquartered global leader in module-level power electronics including DC power optimizers and inverters. Direct competitor to Tongtai's UTOPT03A module-level optimizer and broader smart electronics portfolio in the distributed PV segment.
• QC Solar: Chinese PV junction box and connector manufacturer serving global PV module makers. Direct competitor to Tongtai's Reliable-Box series junction boxes and PV connector products with similar customer base and product positioning.
• Zhejiang Renhe Solar: Chinese PV junction box manufacturer with comparable product portfolio to Tongtai, including bypass diode junction boxes and PV connectors. Competes in the same domestic and international PV module manufacturer customer base with similar technology positioning.
• Stäubli Electrical Connectors: Swiss-based global leader in MC4 PV connectors and industrial electrical connectors. Direct competitor to Tongtai's PV-CNT03 and PV-CO02 connector products, serving the same global PV module manufacturers with comparable MC4-compatible interconnection systems.

Broad incumbents

• JinkoSolar: World's largest PV module manufacturer with vertical integration into components including junction boxes. As a key PV customer segment for Tongtai, JinkoSolar represents both a potential customer and a vertically-integrated competitor in some component categories.
• TE Connectivity: Global electronic connector and sensor manufacturer with PV connector products. Overlaps with Tongtai's connector business as part of a much broader portfolio serving industrial, automotive, and renewable energy markets with established global scale.
• Sungrow Power Supply: Chinese-headquartered global leader in PV inverters and energy storage systems. While primarily an inverter company, Sungrow's broader portfolio of PV system electronics creates adjacency with Tongtai's module-level smart electronics and monitoring products in the distributed PV market.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights7 records

Customer concentration

Compliance8 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Subsidiaries1 record

Funding overview

Funding rounds1 record

Investors2 records

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 Tongtai Technology