美股太阳能股多数上涨，Nextpower涨近15%，第一太阳能涨近4%，Sunrun涨超3%

Group 1 - The core viewpoint of the article highlights that solar stocks in the U.S. experienced a majority increase on January 28, with notable gains in specific companies [1] Group 2 - Nextpower saw a significant rise of nearly 15% [1] - First Solar increased by nearly 4% [1] - Sunrun experienced an increase of over 3% [1]