Staco Energy is the oldest and largest manufacturer of variable transformers in the United States. The first Staco Energy variable transformer was manufactured in Dayton, Ohio in 1937. 

Since then, Staco Energy Products Company has pioneered improvements in design and construction of equipment for industrial, commercial, medical and military applications:

  • Standard and specialized variable transformers
  • AC voltage control
  • Power conditioning
  • UPS
  • Power Factor Correction
  • Active Harmonic Mitigation

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