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UL Issues First UL 9540 Certified Home Energy Storage System to Enphase Energy

November 3, 2016

NORTHBROOK, Ill., November 3, 2016 UL, a global safety science organization, today announced it has issued the first UL 9540 certification for a complete home energy storage system to Enphase Energy, Inc. (NASDAQ:ENPH), a global energy technology company  (Model B280-1200-LL-I-US00-RF0) - The system meets the latest National Electric Code 2017 requirements.

Energy storage systems enable homeowners as well as commercial building owners to store energy whether from solar, wind, or other electrical generation sources.  This provides the benefit of having electricity available onsite to help lower utility demand and/or use when electricity generation is not available.

Energy storage offers reliability, flexibility and efficiency, making it easier to include clean energy sources in the electrical grid system.  However, this ongoing modernization of a grid using increasing levels of distributed generation and renewable energy resources creates the need for safer home energy systems.

“Enphase is excited that our ground breaking AC Battery product is the first residential energy storage product to receive a UL 9540 certification for the North American market. Our work with UL has allowed us to quickly migrate our storage technology from Australia to North America, while complying with all applicable North America safety standards,” said John Berdner, VP of Regulatory and Policy Strategy at Enphase Energy. “We selected UL to perform our global certification, and our close working relationship with them has been invaluable in this effort. We look forward to further collaboration with UL to expand our innovative product offerings both in breadth and to other geographies globally.”

What is a UL 9540-certified system?

An energy storage system (ESS) certified to UL 9540 is primarily comprised of a UL 1973-certified stationary battery that is then evaluated for use with a power conversion system, such as a UL 1741-certified inverter, together as a system.  Achieving certification to both individual UL product standards is the first important step towards completion of the UL 9540 system certification. As more and more ESS are installed, consumers, utilities, commercial building owners, insurers, fire fighters and electrical/building inspectors will all benefit from these systems meeting UL 9540 system safety standard requirements.

Enphase’s AC Battery is comprised of a stationary battery pack manufactured by Eliiy Power Co., Ltd, a Japanese corporation that is UL 1973 certified and an UL 1741 certified inverter manufactured by Enphase.  It also meets the latest National Electric Code 2017 requirement for Listed equipment in the newly published Article 706, Energy Storage Systems.

“We are at the start of a new era, in which energy storage becomes a foundational element of the way we think about electricity for home, building and utility use,” said Ibrahim Jilani, Global Business Development Leader for Energy Systems at UL.  “We are pleased to announce the first residential & commercial energy storage system to meet UL 9540 requirements and receive certification from UL. These types of products demonstrate what the future of electricity throughout the world is becoming: co-located power available after generating electricity through renewable or traditional sources.”

To verify a UL listing or certification, users can search and enter a model number in the keyword field, or search by company name (such as Enphase Energy) and category code (“FTBW” is the category code for Energy Storage Systems).

For more information about UL 9540 and the NEC 2017 updates, register for a free webinar on December 14, 2016 at 10-11am CST: NEC 2017 Update for Energy Systems (, or visit For product testing, evaluation or certification questions, email

About UL      

UL is a premier global independent safety science company that has championed progress for more than 120 years. Its nearly 11,000 professionals are guided by the UL mission to promote safe working and living environments for all people. UL uses research and standards to continually advance and meet ever-evolving safety needs. We partner with businesses, manufacturers, trade associations and international regulatory authorities to bring solutions to a more complex global supply chain. For more information about our certification, testing, inspection, training and education services, visit