美国清洁能源税抵免新规出炉，光伏板块上演集体狂飙

Group 1 - The core viewpoint of the articles highlights a significant market reaction to the clarification of clean energy tax credit requirements, with major solar companies experiencing substantial stock price increases [2][4] - Sunrun's stock surged by up to 42%, closing with a gain of 32.82%, while SolarEdge Technologies rose by 17.10%. Other solar-related stocks also saw notable increases, including NexTracker (up 12.21%), First Solar (up 11.05%), Enphase Energy (up 8.13%), and Array Technologies (up 25.33%) [2] - The new guidance follows an executive order by Trump aimed at tightening tax credits, which has caused uncertainty in the renewable energy sector, particularly affecting over 2,500 solar and wind projects that may be impacted [4][5] Group 2 - The updated guidelines eliminate the previous "5% standard" for large projects, requiring developers to demonstrate "substantial physical construction" within four years, while small solar facilities under 1.5 megawatts can still apply under the old "5% expenditure" standard [5] - Analysts from Roth Capital Partners noted that the new guidelines are more favorable than expected, with minimal overall changes, and large renewable energy developers are well-positioned to adapt to the policy shifts [6] - The new regulations are expected to benefit larger companies with advanced project progress, while smaller developers may face challenges in meeting the new requirements [6]