Huawei PV Inverters Deliver Rapid Shutdown with Tigo’s UL Certification



Los Gatos
United States



Huawei PV Inverters Deliver Rapid Shutdown with Tigo’s UL Certification

The innovative solution of smart MLPE and inverters are compliant with NEC 2017 for residential and commercial PV installations.

Los Gatos, CA, April 22, 2019 – Tigo®, pioneer of the smart modular Flex MLPE platform, today announced the new Underwriter Laboratories (UL) certification of its TS4 Platform Rapid Shutdown Systems (RSS) with Huawei, a leading global ICT (Information and Communication Technology) and network energy solutions provider. The Huawei inverters listed below were successfully certified with Tigo’s RSS solutions: TS4-F (Fire Safety), TS4-S (Safety), TS4-O (Optimization), and TS4-L (Long String). Tigo is currently compatible and available with Huawei and more tier one certified inverter manufacturing partners throughout the U.S. Contact Tigo to learn more about RSS information for integrated or retrofitted PV installations.

This UL certification is part of Tigo’s multivendor initiative providing customers with the advantages of reliable, safe, and cost-effective solutions. The use of Tigo smart modules and high efficiency inverters allows design flexibility for installers to comply with National Electric Code (NEC) 2017 690.12 RSS regulations. Tigo has also been internationally recognized as the only module-level power electronic vendor with UL-certified RSS with multiple PV module manufacturers. To learn more about Tigo’s RSS solutions, join Tigo’s online NABCEP-accredited trainings.

The following Huawei inverters are newly UL-listed as a Rapid Shutdown System with Tigo’s TS4 units:

TS4-F (Fire Safety)
The most cost-effective RSS solution with SunSpec-defined power-line communication.
Huawei SUN2000-33KTL-US*
Huawei SUN2000-36KTL-US*
Huawei SUN2000-40KTL-US*

TS4-S (Safety), TS4-O (Optimization), and TS4-L (Long Strings)
The only UL-certified multivendor RSS in the U.S. solar market also include additional features like optimization and long string designs.
Huawei SUN2000-33KTL-US*   
Huawei SUN2000-36KTL-US*
Huawei SUN2000-40KTL-US*
Huawei SUN2000-25KTL-US**
Huawei SUN2000-30KTL-US

*with SUN2000V200R002C20SPC105 firmware or later
**Not UL-PVRSS certified but is operationally compliant with Tigo.

Tigo is currently taking orders - for price and delivery of RSS UL-certified TS4 products, contact +1.408.402.0802 ext. 1,, or consult your preferred solar distributor. For more information about Huawei inverters, contact and visit


About Huawei
Huawei is a leading global ICT (Information and Communication Technology) and network energy solutions provider. Huawei is committed to bringing digital to every person, home and organization for a fully connected, intelligent world. By deeply integrating leading digital information technology, Internet technology, cloud technology and power electronics technology, Huawei Smart PV has launched the leading FusionSolar Smart PV Solution. Based on reports released by global consultancies IHS Markit and GTM Research, Huawei was ranked No.1 globally in inverter shipment for three consecutive years, 2015, 2016 and 2017.

About Tigo Energy, Inc.
Tigo is a Silicon Valley company founded in 2007 by a team of experienced technologists. Combining a unique systems-level approach with expertise in semiconductors, power electronics, and solar energy, the Tigo team developed the first-generation Smart Module Optimizer technology for the solar industry. Tigo's vision is to leverage integrated and retrofitted Flex MLPE and communications technology to drive the cost of solar electricity down. By partnering with tier 1 module and inverter manufacturers in the industry, Tigo is able to focus on its key innovation with the smartest TS4 modular platform and leverage the broader ecosystem. Tigo has operations in the USA, Europe, Latin America, Japan, China, Australia, and the Middle East. Visit

Media Contact for Tigo
Tiffany Douglass
408.402.0802 x 430