Are the SMA Sunny Boys UL-1741 certified? Posted by Frank Molina, Stellavolta on Jul 9th 2020 Yes, in addition to compliance with NEC 2017, the new inverters are compliant with California Rule 21 Phase 2 and UL 1741. SB3.0-1 SP-US-41 SB3.8-1 SP-US-41 SB5.0-1 SP-US-41 SB6.0-1 SP-US-41 SB7.0-1 SP-US-41 SB7.7-1 SP-US-41 solar