Power Quality International (PQI) is a full-service company, manufacturing world-class transformers, harmonic filters, and providing power system solutions to its many consulting, utility, industrial, governmental, institutional, commercial, and manufacturing clients.

Our specialties are mitigating load-generated power system harmonics and improving system and load efficiency.


PQI clients and customers benefit from over 40 years of engineering and technical "hands-on" field experience. With the exception of Antarctica, we have completed major assignments on every continent.

  • Get a Quote
  • Specs and Drawings

  • Search by Industry

  • Search by Product