As solar adoption accelerates globally, ensuring photovoltaic (PV) system safety has become more critical than ever. Rapid Shutdown Devices (RSDs) are essential components designed to meet stringent electrical safety standards. These devices allow emergency responders and maintenance personnel to quickly de-energize rooftop solar arrays, minimizing risk. In this blog, we spotlight the world’s top 8 RSD manufacturers leading the way in innovation, compliance, and performance.
1. HIITIO
Official Links
- Founded: 2018
- Headquarters: Hangzhou, Zhejiang, China
- Company website: https://www.hiitio.com/
- Product lines: https://www.hiitio.com/product-category/solar-system/rapid-shutdown-switch/
HIITIO is a leading global provider of solar rapid shutdown device (RSD) solutions headquartered in China, with a rapidly growing presence in North America, Europe, and Australia. Founded in 2018, HIITIO combines deep expertise in module-level power electronics with a commitment to safety standards such as NEC 690.12 (USA) and IEC guidelines globally.
Its engineers specialize in R&D for low-voltage, fast-response, UL-listed rapid shutdown devices designed for both residential and commercial PV systems. With in-house manufacturing, quality control certified to ISO and CE standards, and technical support in multiple languages, HIITIO has earned trust from EPCs, installers, and distributors worldwide.
VIEW HIITIO RAPID SHUTDOWN DEVICES
Key products and advantages:
- – HIITIO module‑level RSD units featuring <30 ms shutdown to 0 V, UL1741/UL PVRSE certified.
- – Optional monitoring versions with integrated thermal sensing and communication bus.
- – Compatible with both string inverters and module‑level setups.
- – Competitive pricing with long warranty and reliable worldwide logistics.
2. Tigo Energy
Official Links
- Founded: 2007
- Headquarters: Campbell (Silicon Valley), California, USA
- Company website: https://www.tigoenergy.com
- Product lines: https://zh.tigoenergy.com/product/ts4-a-f
Tigo Energy, based in Silicon Valley, pioneered MLPE modules including optimizers and standalone rapid shutdown solutions. Founded in 2007, Tigo’s TS4-A-F / TS4-2-F module-level devices are designed solely for rapid shutdown compliance. The company partners with leading inverter brands to offer plug-and-play SunSpec Certified systems (Tigo Enhanced). Tigo operates globally with commercial and residential installations in North America, Latin America, Europe, and Asia.
Key Products and Advantages
- TS4-A-F and TS4-2-F Rapid Shutdown devices (module-level only, UL/PVRSS).
- Tigo Enhanced ecosystems ensure seamless integration and simplified commissioning.
- Add-on thermal or monitoring options, strong inverter partner ecosystem.
3. APsystems
Official Links
- Founded: 2010
- Headquarters: originally Silicon Valley (San Jose/Austin, USA)
- Company website: https://www.apsystems.com
- Product lines: https://apsmartglobal.com/wp-content/uploads/RSD-D/
APsystems is a global leader in microinverter and MLPE technologies, based in Silicon Valley with R&D centres in France and China. Since its founding in 2010, the company has shipped millions of microinverters and module-level rapid shutdown devices. APsystems offers SunSpec-certified PLC transmitters and RSD-PLC kits to comply with NEC rapid shutdown mandates. Their solutions are widely deployed in residential, commercial, and utility-scale solar projects across North America, Europe, and Asia.
Key Products and Advantages
- APsmart RSD-PLC Rapid Shutdown System (e.g. 408005, SunSpec certified transmitter kits).
- Scalable, dual-channel transmitter architecture for string-level installations, IP65 rated.
- Proven reliability, strong channel support, and competitive costs.
4. SMA Solar Technology AG
Official Links
- Founded: 1981
- Headquarters: Niestetal, Hessen, Germany
- Company website: https://www.sma.de
- Product lines: https://www.sma-america.com/products/sunspec-certified-rapid-shutdown-technology
SMA Solar Technology AG, based in Germany, is a major inverter and solar electronics manufacturer with decades of experience. SMA integrates SunSpec-certified rapid shutdown devices like the JMSF model into its ecosystem, offering reliable module-level compliance with NEC 2017/2020. With a strong presence across Europe, North America, Australia, and Latin America, SMA’s offerings are supported by extensive service networks and proven field reliability.
Key Products and Advantages
- JMS-F SunSpec Rapid Shutdown Device: cost-effective and UL PVRSE compliant.
- Seamless integration with SMA inverters and monitoring platform.
- Excellent reputation for quality, durability, and industry support.
5. Fronius
Official Links
- Founded: 1945
- Headquarters: Pettenbach, Austria
- Company website: https://www.fronius.com
- Product lines: https://www.fronius.com/en/products/accessories/snapinverter-accessories/fronius-rapid-shutdown-box/
Fronius International, headquartered in Austria, is a well-established solar inverter manufacturer and early advocate of SunSpec rapid shutdown standard. With global operations spanning Europe, North America, Australia, and Asia, Fronius has driven technical leadership in safety electronics. Their Symo Advanced inverters include integrated SunSpec PLC transmitters supporting rapid shutdown functionality, making them a preferred solution for code-compliant array designs.
Key Products and Advantages
- Fronius Symo Advanced inverters with SunSpec rapid shutdown built-in.
- UL PVRSE and PVRSS certified combinations with external RSD devices.
- Highly reliable hardware, integrated communications, and professional installer support.
6. ABB
Official Links
- Formed through merger in 1988;
- Headquarters: Zurich (Oerlikon), Switzerland & Västerås, Sweden
- Company website: https://global.abb/group/en
- Product lines: https://library.e.abb.com/public/RapidShutdown-Datasheet.pdf
ABB, the multinational engineering group headquartered in Switzerland/Sweden, has offered solar electronics and safety solutions for many years. ABB supplies rapid shutdown systems integrated into its DC safety products and combiners, operating globally across energy markets. Their module and string-level RSD solutions meet NEC and IEC standards, supported by ABB’s global sales and engineering infrastructure.
Key Products and Advantages
- ABB rapid shutdown units for combiner boxes and module-level racks.
- High-quality build, global certification, and system compatibility.
- Strong global support, especially in utility-scale and commercial solar projects.
7. Ginlong (Solis)
Official Links
- Founded: 2005
- Headquarters: Ningbo, Zhejiang, China
- Company website: https://www.solisinverters.com/us
- Product lines: https://www.solisinverters.com/us/rsd/Solis-RSD_us.html
Ginlong Technologies, known under its Solis inverter brand, is a China-based solar electronics manufacturer founded in 2005. While best known for string inverters, Ginlong also offers compatibility with SunSpec rapid shutdown solutions, and partners with module-level MLPE providers to achieve NEC compliance. Solis inverters offer integrated monitoring and safety protocols.
Key Products and Advantages
- Solis platform ready for integration with external SunSpec RSD modules.
- Cost-effective inverter + RSD combinations and strong presence in Asia-Pacific.
- Reliable after-sales support and competitive pricing for emerging solar markets.
8. MidNite Solar
Official Links
- Founded: 2005
- Headquarters: Arlington, Washington, USA
- Company website: https://www.midnitesolar.com
- Product lines: https://www.solarelectric.com/residential/circuitprotection/rapidshutdownequipment.html
MidNite Solar is a U.S.-based specialist in protective solar components, founded in 2003 in Seattle, Washington. The company designs circuit breakers, combiners, and rapid shutdown equipment tailored to residential and small-commercial solar systems. Known for its rugged, UL-listed components, MidNite is popular among solar installers requiring modular wiring and safety hardware in North America.
Key Products and Advantages
- MNEPV16-600RT Remote-Trip Circuit Breaker with rapid shutdown capability.
- IMO Ultimate Rapid Shutdown Device kits.
- Installer-friendly components, modular design, and strong U.S. code compliance.
Related Content You Shouldn’t Skip：
- What Are the Key Considerations When Installing Rapid Shutdown?
- Why Should You Install Rapid Shutdown for Your Solar System?
- What is PV Rapid Shutdown Device and the relevant regulations and certification requirements of each country
- All You Should Know About Rapid Shutdown Devices (RSD)
Why Choose HIITIO for Your Rapid Shutdown Needs
As listed above, HIITIO leads the industry with fast, compliant, and cost-effective module-level rapid shutdown devices suited for residential through commercial solar installations. We provide global logistics, multilingual technical support, and long-term warranty service. If you’re specifying rapid shutdown devices for safety, reliability, and regulatory compliance, choose HIITIO—your trusted partner in solar PV safety systems. Visit our website to request a quote or view datasheets.
