UL 1741
Inverters, Converters, Controllers and Interconnection System Equipment for Use With Distributed Energy Resources
Also written as ANSI/CAN/UL 1741
- Issuing body
- UL Standards & Engagement
- Current edition
- 3rd edition
- Published
- 2021-09-28
- Last verified
- 2026-08-23
What it covers
The North American product-safety and grid-support standard for the power conversion system. Beyond electrical safety of the inverter, its Supplement SB is the route by which a PCS demonstrates the grid-support behavior required under IEEE 1547-2018 — voltage and frequency response and ride-through. It is the certification most often named for a PCS in US permitting and interconnection.
Editions
- 3rd edition In force 2021-09-28
Continuously revised. Supplement SB certifies the grid-support functions of a converter against IEEE 1547-2018 and IEEE 1547.1-2020.
- 2nd edition Superseded
Official source
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View UL 1741 at UL Standards & Engagement ↗