Power Quality Inc. was founded in 1993 by professionals with more than 30 years of experience in the power quality industry to offer engineering services and products worldwide.

We offer a wide range of power quality products and services, including electrical system power analysis, testing, monitoring, trouble analysis, fault diagnostics, ground current testing, leakage current testing, power quality sensitive testing, design advice for power quality and power quality training for end user and utility customer engineers.



Power Quality Inc. offers a wide range of power quality products & services including:

  • PQ engineering consulting services
  • PQ quality rental instruments (Dranetz and Reliable Power Meters).
  • PQ instrument repair and spare parts for Reliable Power Meters and BMI instruments
  • Power Quality Practitioner ™ training classes

Provide advice on power quality & training:

  • Power Quality Monitoring
  • Power Quality Practitioner™
  • RPM Training


Local Repair services for battery power mobility devices, Battery backup devices and systems

Do you have a question on power quality situtation or data you've collected and would like our PQ experts to evaluate?

You can contact us by, E-mail:


PQSynergy™ Conference & Exhibition

We organize an International conference annually. PQSynergy™ objectives is to support research nad to share experiences in the related fields of power quality, energy efficiency, renewable energy, and smart grid. The conference is held normally in Thailand but occasionally is relocated around Asia.

Moreover, PQSynergy™ provides exhibition booths to promote new technology for power system monitoring, control PQ solutions and the new smart grid system.

For more information, you can visit


PQ Blog

Power Quality Blog has been created by Power Quality (Thailand) Co., Ltd. to share knowledge, and experience in solving power quality challenges.

We focus on a wide range of power quality related issues, such as harmonics, transients, voltage variations, flicker, poor power factor, voltage sags and swells, and unbalance electrical loads etc.

PQ Blog also includes case studies, power standards, power protection, PQ meters, PQ technologies, PQSynergy™ papers and much more.

You can visit the PQ Blog webist :


Lithium & Seal Lead Acid Batteres

For more inforamtion and purchasing, you can visit the website

PQSim 100 & 200™ A Power Practitioner™ Training Tool

PQSim was designed by Power Quality Experts with 30 years’ experience testing and documenting Power Quality.

It provides the user with the capability to select PQ events and their magnitude to test PQ instrument setups, capture capability with a repeatable and predictable voltage and current waveform.









Power Quality Inc. All Rights Reserved 2021