Solar rooftop safety standards (NEC 690.12 / UL 1741 / IEC-related guidance and equivalents) have driven a fast-growing market for Rapid Shutdown Devices (RSDs) and MLPE (module-level power electronics) in China. Below, we profile 8 Chinese manufacturers that lead in RSD design, certification, and global shipment.

1. HIITIO

• Founded:2018
• Headquarters: Hangzhou, China.
• Core products: CSA Rapid Shutdown Devices (MLPE), PV junction boxes, DC fuses, combiner boxes, PV accessories.
• Official Website: https://www.hiitio.com/
• Product Website: https://www.hiitio.com/product-category/solar-system/rapid-shutdown-switch/

HIITIO is a Hangzhou-based electrical components and PV-safety specialist focused on module-level rapid shutdown and related DC safety accessories. Since establishing its RSD product line, HIITIO has positioned itself as a vertically integrated supplier offering R&D, UL/CE/TÜV-oriented testing support, and customized MLPE solutions for rooftop and commercial PV projects. The company emphasizes long-life semiconductor switches, PLC-based communication options for signal wiring simplification, and product designs tuned to NEC 690.12 requirements for the U.S. market while maintaining global interoperability.

RSD highlight
HIITIO’s RSD portfolio (e.g., HS4-series) emphasizes low on-resistance MOSFET switches, PLC communication to avoid extra signal cables, compact housings for module mounting, and compatibility with short-circuit events. The product positioning stresses long lifecycle reliability and compliance with NEC timing/voltage requirements for firefighter safety.

2. Sungrow

• Founded: 1997.
• Headquarters: Anhui Province
• Core products: Grid-tie and storage inverters, energy storage systems, and MLPE / RSD solutions.
• Official Website: https://www.sungrowpower.com/
• Product Website: https://www.sungrowpower.com/en/products/mlpe/sr20dm

Sungrow is one of the world’s largest inverter manufacturers and a major Chinese exporter that has extended its product portfolio into MLPE and rapid shutdown solutions. With global R&D and manufacturing footprints and a history of large inverter deployments, Sungrow leverages its inverter ecosystem to integrate module-level and string-level safety features that meet UL/CSA standards. Sungrow’s RSD products (for example the SR20D-M and SP series MLPE) are engineered to drop DC array voltage rapidly (typically within 20–30 seconds) and to integrate arc-fault protection (AFCI) where required. Sungrow’s market influence stems from deep inverter market share, broad project references, and rapid rollout of RSD options compatible with its inverter families and third-party systems.

3. ZJ BENY

• Founded: 2011
• Headquarters: Zhejiang
• Core products: Rapid shutdown modules, combiner boxes, DC isolators, surge protection.
• Official Website: https://www.zjbenydc.com/
• Product Website: https://www.zjbenydc.com/module-level-rapid-shutdown

ZJ BENY (commonly presented as BENY) is a Chinese manufacturer with a long history in PV DC components and safety devices. The company develops module-level rapid shutdown products (BFS-series) and a wide range of DC combiner boxes, isolator switches, and surge protective devices that supply EPCs and inverter OEMs. BENY positions its RSDs as NEC-compliant, UL-listed MLPE devices aimed at both domestic and export markets, supported by a substantial component certification portfolio. BENY’s advantage is its longstanding presence in DC safety components—supplying both balance-of-system hardware and MLPE devices—enabling turnkey safety solutions for rooftop integrators.

4. THINKWE Technology

• Founded: 2011
• Headquarters: Wuxi / Jiangsu area.
• Core products: Rapid shutdown devices, power optimizers, firefighter safety switches, SPD.
• Official Website: https://www.thinkwe-tech.com/
• Product Website: https://www.thinkwe-tech.com/col.jsp?id=104

THINKWE is a specialist PV safety OEM based in Jiangsu with a product mix that includes array-level and module-level rapid shutdown devices, firefighter safety switches, PV optimizers, and surge protection equipment. The company focuses on R&D and mass production for safety components and sells to both domestic installers and international distributors. THINKWE highlights cost-effective MLPE devices with compliance to NEC standards and targeted production capacity for high-volume rooftop projects. The company’s public materials emphasize years, R&D team size, and shipment volumes as differentiators in the safety-component niche. THINKWE often appears in China-centric supplier directories for RSD and firefighter safety switches.

5. QC Solar

• Founded: 2005
• Headquarters: Qingdao / China presence across OEM channels.
• Core products: MLPE (junction boxes, rapid shutdown modules), connectors, PV accessories.
• Official Website: https://www.qc-solar.com/
• Product Website: https://www.qc-solar.com/smarttrack05-pv-module-level-rapid-shutdown-product/

QC Solar (Qingdao / QC-Solar brand) has broadened from PV component manufacturing into MLPE and RSD product lines, including the Smarttrack family of module-level rapid shutdown devices. QC Solar markets RSDs that meet TÜV/UL test regimes and highlights technology licensing partnerships (for example prior licensing relationships for MLPE core tech). The company emphasizes thermal performance, low on-resistance characteristics, and SunSpec/industry-compatible communication for easier integration into existing systems. QC Solar positions its Smarttrack MLPE as a TÜV-tested, patent-backed solution tailored to both module-makers and BOS integrators seeking pre-validated RSD modules.

6. Yueqing FEEO

• Founded: 2011
• Headquarters: Yueqing, Zhejiang.
• Core products: Rapid shutdown devices, combiner boxes, connectors, fuse holders.
• Official Website: https://www.feeo.com.cn/
• Product Website: https://www.feeo.com.cn/products/pv-solar-rapid-shutdown-switch-solutions-nfpa-70-compliant-easy-to-install.html

Yueqing FEEO Electric (FEEO) is a Chinese manufacturer specializing in PV combiner boxes, rapid shutdown devices, connectors, and DC safety hardware. FEEO’s RSD series targets residential and commercial systems with products rated for up to 1500 Vdc and IP-rated housings for rooftop exposure. The company emphasizes compliance with NFPA/NEC expectations for firefighter safety and designs aimed at installers requiring rugged, weather-resistant MLPE modules and branch protection. FEEO’s product catalog positions RSDs alongside fuse holders, MC4 connectors, and combiner boxes, enabling an integrated BOS component offering for EPCs.

7. SUNGO

• Founded: 2016
• Headquarters: China
• Core products: MLPE rapid shutdown modules, junction boxes, PV gateways.
• Official Website: https://www.sungoess.com/
• Product Website: https://www.sungoess.com/rapid-shutdown

SUNGO (branded in various forms such as SUNGO / SUNGOESS) is a PV BOS and MLPE OEM offering rapid shutdown devices, junction boxes, and monitoring gateways. The SUNGO RSD-series (e.g., RSD-2) is promoted as a compact 2-in-1 MLPE device supporting heartbeat signal schemes and fast disconnection when control signals cease. SUNGO targets module OEMs and installers with solutions that emphasize simple integration, compatibility with centralized gateways, and fast shutdown response times per NEC timelines. The company frequently publishes technical manuals and installation guides for its RSD products to support EPC deployment.

8. SUNTREE Electric

• Founded: 2007
• Headquarters: China (Yueqing / Zhejiang cluster common for BOS suppliers).
• Core products: Rapid shutdown devices, combiner boxes, DC accessories.
• Official Website: https://www.chinasuntree.com/
• Product Website: https://www.chinasuntree.com/rapid-shutdown-device/

SUNTREE Electric supplies PV BOS components including rapid shutdown products, combiners, and DC protection devices focused on rooftop and small C&I projects. The company’s RSD portfolio includes module-level shutdown devices and array-level safety switches with documentation for installers. SUNTREE emphasizes practical installer-friendly features—IP ratings, simple wiring, and compatibility with mainstream inverters. As a China-based MLPE supplier, SUNTREE aims to provide cost-competitive RSD hardware for both local distribution and export via trade channels.

Why choose HIITIO Rapid Shutdown Devices

HIITIO’s Rapid Shutdown Device series is engineered to meet firefighter safety and international compliance while providing installer-friendly integration. With module-level MLPE options and PLC-based controllers, HIITIO minimizes extra signal wiring and speeds field deployment.

For project teams wanting a single-source supplier that combines BOS components and certified MLPE RSDs, HIITIO’s product pages and technical resources are a good starting point to request samples and certification dossiers.