1989
- Founded in Taipei in 1989.
The Leader in AC & DC Power Solutions
Founded in 1989, Preen brings over 35 years of expertise to the power testing industry. Driven by our core power electronics technology, we deliver world-class programmable AC and DC power solutions. We provide precise, reliable testing systems for the renewable energy, electronics, and laboratory sectors. Through our robust global network, we closely support customer needs and continue to expand our international footprint.
History
1990
- Launched the world's first energy-saving APS series solid state power conditioner (only 1/4 the size and weight of conventional models).
- Introduced the first-generation AFC series AC power source / frequency converter.
2007
- Released the new-generation AFC series AC power source / frequency converter.
- Launched the ADC series rack-mount DC power supply.
2009
- Established the U.S. branch office.
2011
- Achieved a world-leading 65MVA in annual total shipped capacity for AC power sources / frequency converters.
2020
- Developed the 1MW Energy Storage PCS Test System.
- Launched the ADG+ series high-power programmable DC power supply.
- Awarded the D&B Top 1000 Elite SME Award for three consecutive years.
2025
- Earned high recognition from international certification authorities for the AFV+ series.
- Completed a comprehensive upgrade of the AFV-P series programmable AC power source.
- Established the European branch office.
Core Values & Vision
Innovation
Expanding Technology, Pushing Power Limits
We foster innovation as the foundational cornerstone of our long-term corporate growth. By continuously extending our core technologies across a diverse range of power products, we push the boundaries of technological excellence to engineer top-tier, high-power equipment with single-unit capacities reaching up to 2,000kVA.
Value
The Most Comprehensive Portfolio & Market Share Leader
We are dedicated to delivering products and services of the highest value to our clients and the market. Offering the industry's most complete portfolio of power solutions, we stand as the leading manufacturer in the high-power market, achieving both the highest market share and the largest shipment volumes.
Global Network
Local Roots, Global Impact
Anchored by our three major production and technology hubs in Taiwan, Suzhou, and Tianjin, we synergize with global strategic partners to deliver a seamless, round-the-clock service network and real-time support. From R&D and validation to manufacturing, we consistently empower enterprises with highly stable and efficient testing capabilities.
Explore global locationsHonor & Award
Many of Preen’s recently launched programmable power products have been honored with the prestigious Taiwan Excellence Award. Our core product lines are fully CE certified and compliant with EMC and LVD directives, ensuring optimal operational safety while minimizing electromagnetic interference (EMI). In our commitment to environmental sustainability, Preen strictly enforces RoHS compliance, mandating that all components meet hazardous substance regulations. Furthermore, our manufacturing facilities are annually certified to ISO 9001:2015 standards. Through rigorous control over our production and quality assurance processes, we guarantee the delivery of first-class products and services to our customers worldwide.
Taiwan Patent
ISO 9001 WSF
D&B TOP 1000 Elite SME Award
ISO 9001 BSI
ISO 9001 DNV GL
RoHS - AFC Series
RoHS - AFV Series
Career
Innovation, Quality, and Service are the core engines driving our continuous growth. We are actively expanding our global team and seeking forward-thinking professionals in Product R&D, Marketing, and Business Development.
If you are driven by passion and thrive on challenges, we invite you to join us. Here, your impact knows no borders. Partner with us to define the future on the global stage.
Join us