1998 The Dong Guan II factory begins full operation.Taiwan headquarters and Tao-Yuan factory receive ISO9001 certification.
1999 Headquarters relocates to present address at Neihu, Taipei.
2000 Dong Guan factory receives ISO 9001 certification. The first PSU maker to provide PC and IPC market cost-effective Active PFC (Power Factor Correction) solutions. Designs and applies S2FC (Smart & Silent Fan Control) towards PC and IPC products.
2002 USA office opens in California, USA. Sea Sonic Electronics Co., Ltd. lists on Taiwan's Gre Tai Securities Market (OTC Stock Exchange).
2003 Launched retail products with own brand name and won awards and recommendation worldwide.
2004 Dedicated to develop green & silent power supplies with higher efficiency and higher power output.
2005 The USA office was renamed as Sea Sonic Electronics Inc., a 100% Sea Sonic owned subsidiary, to serve North and South America customers. The first PSU manufacturer to win the 80 Plus efficiency certification.
2006 Dong Guan factory receives ISO14001 certification. Began to mass-produce RoHS & WEEE compliant products.
2008 European subsidiary opens in the Netherlands to serve the European market. Dong Guan Factory II begins full operation.
2009 Sea Sonic is first in the market to achieve 80 PLUS® Gold rating by introducing the "X" Series power supplies.