Seattle City Light Adopts New Standard for Solar Panel Inverters
Beginning this year, all proposed inverter-based Distributed Energy Resources (DER) must use inverters certified under Underwriters Laboratories (UL) 1741 Supplement B (Standard for Safety Inverters, Converters, Controllers and Interconnection System Equipment for Use with Distributed Energy Resources, Supplement B and labeled as UL1741-SB) and Institute of Electrical and Electronics Engineers (IEEE) 1547-2018 (Standard for Interconnection Interoperability of Distributed Energy Resources with Associated Electric Power Systems Interfaces).




Comment Opportunity for Updated Tree Requirements Tip
The Seattle Department of Construction and Inspections (SDCI) recently updated several of our Tips related to the Tree Protection Code (SMC 25.11) to provide additional clarification on our current tree regulations. In particular, SDCI substantially updated Tip 242A, Tree Requirements Associated with Development, to include information related to the basic tree protection area and the allowance to remove Tier 2 trees in certain instances. Tips are one tool the department uses to explain complex codes to the public and help customers understand the regulations. Tips also give guidance on how applicants should show compliance with codes in a permit application.