These requirements cover inverters ,converters ,charge controllers ,and output controllers intended for use in stand-alone(not grid connected) or utility-interactive (grid-connected) power systems .Utility-interactive inverters and converters are intended to be installed in parallel with an electric supply system or an electric utility to supply common loads.
UL 1741-1999 history
1970UL 1741-2022 Static inverters and charge controllers for use in photovoltaic power systems
2020UL 1741 CRD-2020 Standard for Inverters, Converters, Controllers and Interconnection System Equipment for Use With Distributed Energy Resources (Certification Requirement Decision, 3/11/2020)
2018UL 1741 CRD-2018 UL Standard for Safety Inverters@ Converters@ Controllers and Interconnection System Equipment for Use With Distributed Energy Resources - Section / Paragraph Reference: New Subject: Power Control Systems (PCS) (Edition 2: April 20@ 2010)
2018UL 1741 BULLETIN-2018 UL Standard for Safety Inverters@ Converters@ Controllers and Interconnection System Equipment for Use With Distributed Energy Resources (COMMENTS DUE: February 12@ 2018)
2017UL 1741 BULLETIN-2017 UL Standard for Safety Inverters@ Converters@ Controllers and Interconnection System Equipment for Use With Distributed Energy Resources (COMMENTS DUE: January 23@ 2017)
2016UL 1741 CRD-2016 UL Standard for Safety Inverters@ Converters@ Controllers and Interconnection System Equipment for Use With Distributed Energy Resources - Section / Paragraph Reference: New Sections – 40B1- 40B2 Subject: Additional Requirements for Single Phase 2 Wire Ut
2016UL 1741 BULLETIN-2016 UL Standard for Safety Inverters@ Converters@ Controllers and Interconnection System Equipment for Use With Distributed Energy Resources (COMMENTS DUE: September 5@ 2016)
2015UL 1741 CRD-2015 UL Standard for Safety Inverters@ Converters@ Controllers and Interconnection System Equipment for Use With Distributed Energy Resources -Section / Paragraph Reference: New Sections – 40B1- 40B2 Subject: Additional Requirements for Single Phase 2 Wire Uti
2015UL 1741 BULLETIN-2015 UL Standard for Safety Inverters@ Converters@ Controllers and Interconnection System Equipment for Use With Distributed Energy Resources
2014UL 1741 BULLETIN-2014 UL Standard for Safety Inverters@ Converters@ Controllers and Interconnection System Equipment for Use With Distributed Energy Resources (COMMENTS DUE: April 07@ 2014)
2013UL 1741 CRD-2013 UL Standard for Safety Inverters, Converters, Controllers and Interconnection System Equipment for Use With Distributed Energy Resources - Section / Paragraph Reference: Sec. 101 to 107 Subject: Clarification for PV Input Circuit Combiners and PV Combiner
2013UL 1741 BULLETIN-2013 UL Standard for Safety Inverters@ Converters@ Controllers and Interconnection System Equipment for Use With Distributed Energy Resources (COMMENTS DUE: October 21@ 2013)
2012UL 1741 CRD-2012 UL Standard for Safety Inverters, Converters, Controllers and Interconnection System Equipment for Use With Distributed Energy Resources - Section / Paragraph Reference: New Section 108 Subject: Arc Fault Circuit Protection (Edition 2: January 28, 2010)
2012UL 1741 BULLETIN-2012 UL Standard for Safety Inverters@ Converters@ Controllers and Interconnection System Equipment for Use With Distributed Energy Resources (COMMENTS DUE: August 13@ 2012)
2011UL 1741 CRD-2011 UL Standard for Safety Inverters@ Converters@ Controllers and Interconnection System Equipment for Use With Distributed Energy Resources - Section / Paragraph Reference: New Section 108 Subject: Arc Fault Circuit Protection (Edition 2: January 28@ 2010)
2011UL 1741 BULLETIN-2011 UL Standard for Safety Inverters@ Converters@ Controllers and Interconnection System Equipment for Use With Distributed Energy Resources
2010UL 1741 CRD-2010 UL Standard for Safety Inverters@ Converters@ Controllers and Interconnection System Equipment for Use With Distributed Energy Resources - Section / Paragraph Reference: New proposed sections 87 to 100. Subject: Non-Isolated EPS Interactive PV Inverters R
2010UL 1741 BULLETIN-2010 Summary of Topics This bulletin announces the availability of the Outline of Investigation for Enclosed and Dead-Front Switches for Use in Photovoltaic Systems, Subject 98B.
2010UL 1741-2010 Inverters, converters, controllers and interconnection system equipment for use with distributed energy resources
2009UL 1741 BULLETIN-2009 UL Standard for Safety Inverters@ Converters@ Controllers and Interconnection System Equipment for Use With Distributed Energy Resources (COMMENTS DUE: JULY 13@ 2009)
2008UL 1741 BULLETIN-2008 UL Standard for Safety Inverters@ Converters@ and Controllers for Use in Independent Power Systems (COMMENTS DUE: October 27@ 2008)
2005UL 1741 BULLETIN-2005 UL Standard for Safety Inverters@ Converters@ Controllers and Interconnection System Equipment for Use With Distributed Energy Resources
2004UL 1741 BULLETIN-2004 UL Standard for Safety Inverters@ Converters@ Controllers and Interconnection System Equipment for Use With Distributed Energy Resources
2001UL 1741 BULLETIN-2001 UL Standard for Safety Inverters@ Converters@ Controllers and Interconnection System Equipment for Use With Distributed Energy Resources
1999UL 1741-1999 Static inverters and charge controllers for use in photovoltaic power systems