The Duck Curve#inverters
UL Solutions opens V2G certification under new UL 1741 Supplement SC
UL Solutions Inc. announced on September 14, 2026 a certification program for vehicle-to-grid equipment: bidirectional EV supply equipment tested to UL 1741 Supplement SC, which the Vehicle-Grid Integration Council says UL Standards & Engagement published on May 21, 2026 for EVs with SAE J3072 onboard inverters, plus a second route pairing UL 1741 multipiece DER requirements with UL 9741. Its borrowed figures: a GM Energy-funded E3 study's 2030 model (V2G 5 to 15 times managed charging per vehicle) and a 2020 EPRI Journal projection (about 90% of EVs will be parked at any given time).
India drafts storage mandate for ground-mounted solar and onshore wind
India's Central Electricity Authority published a draft second amendment to its construction technical standards on September 3, 2026 that would require ground-mounted solar and onshore wind plants commissioned after July 1, 2027 to have co-located energy storage of at least 10% of installed capacity with a two-hour minimum duration, rising to four hours for plants commissioned between July 1, 2029 and June 30, 2031. Renewable plants commissioned after July 1, 2027 would also need grid-forming control on at least 15% of inverters; comments are due October 4, 2026.
Trump declares bulk-power emergency, targets foreign grid equipment
President Trump signed Executive Order 14420 on August 26, 2026, declaring a national emergency over the US bulk-power system under IEEPA and authorizing the Energy Department to bar acquisition, import, or installation of foreign-produced grid equipment, including substation transformers, grid-connected inverters, and battery energy storage systems, when it finds both a tie to a Covered Foreign Entity and an undue security risk. The order directs implementing rules as needed within 120 days and also covers equipment already installed.
FCC redraws its foreign inverter ban around the 45X tax credit
The FCC modified its Covered List entry for foreign-produced power inverters on August 20, 2026: the ban now covers only UL 1741 utility-interactive inverters but extends to wired connectivity, and inverters eligible for the Section 45X manufacturing credit are no longer treated as foreign-produced.