UL 3700 Ed. 1-2025

Outline of Investigation for Interactive Plug-In PV (PIPV) Equipment and Systems - Published Date: December 11, 2025

1.1 These requirements apply to plug-in PV (PIPV) equipment and systems that generate power and have an AC or DC PIPV interconnection cord with a PIPV plug used for connection to a permanently installed PIPV receptacle.  1.2 PIPV equipment covered by this outline is complete in their construction, comply with the applicable requirements of this outline, and can be interconnected with other plug-in equipment to form a PIPV System.  1.3 The scope of these requirements is limited to PV modules and PV DC circuits with a maximum open circuit voltage of 64 VDC at Outline Test Conditions (80 VDC with an applied 1.25 factor to adjust for cold temperature).  1.4 Equipment covered by this outline is only intended for use in non-hazardous locations.  1.5 Equipment covered by this Outline may be movable.  1.6 The scope of this outline does not include roof mounted PV, Building Integrated PV, or PV equipment and systems that are permanently electrically connected to the premises wiring or point of service. PV equipment and systems with electrical connections to premises wiring or point of service are within the scope of the local building codes such as the National Electrical Code® (NEC®) (NFPA 70®) and fire code(s).  NFPA 70®, National Electrical Code®, and NEC® are registered trademarks of the National Fire Protection Association, Quincy, MA.  1.7 The requirements of this outline also address requirements for PIPV equipment and systems that are supplied with manufacturer’s installation instructions that include provisions for securing the equipment to withstand environmental loads in accordance with the International Building Code (IBC) or International Residential Code (IRC), as applicable, such as wind, snow, seismic forces, and gravity. This outline does not evaluate or verify the structural integrity or load-bearing capacity of the building components themselves, such as balcony railings.  1.8 The scope applies to PIPV connected only to an area or local electric power system (EPS) circuit where all components in the circuit – including connectors, receptacles, circuit interrupter devices (e.g., GFCI), and overcurrent devices – are listed and identified for bidirectional current flow and installed in accordance with applicable National Electrical Code (NEC), NFPA 70 requirements.