Preen

What Preen does

Preen (AC Power Corp.) is a Taiwanese power electronics company founded in 1989 and headquartered in New Taipei City that designs and manufactures programmable AC and DC power supplies and automated test systems used to validate, certify, and stress-test electrical equipment across regulated and high-growth end markets. Verticals served include renewable energy (PV inverters, energy storage, smart inverters for grid compliance), electric vehicles and rail transit (AC and DC charger interoperability, onboard power, battery and DC/DC subsystems), AI server and data center power infrastructure (PDU, power module, cooling, TIM validation), HVAC and home appliances, semiconductors and electronic components, medical equipment, marine and shore power, aerospace and defense (400Hz ground power under MIL-STD-704F), and EMC laboratories and certification bodies.

The product portfolio spans 14+ series: programmable AC sources (AFV-P, AFV-S, AFV+, AFV, AFC), a regenerative four-quadrant grid simulator (PAS/PFV up to 2,000kVA, with over 90% efficiency), a 400Hz ground power unit (AMV/AMF), programmable DC supplies (ADG-L 5-15kW, ADG+ 30-300kW parallelable to 1,800kW, ADC 2-8kW rack-mount), solid-state power conditioners and inductive voltage regulators (APS, APH), automated test systems (EVSE ATS and Inverter/PCS ATS), an anti-islanding RLC load bank (ARLC), and the complimentary Preen Program control software with LabVIEW drivers and Modbus/SCPI command support. Underlying technology is proprietary PWM and DSP-based control architecture with self-developed high-power modules for stability and heat dissipation.

Preen operates three major production and technology hubs in Taiwan, Suzhou, and Tianjin, with regional offices in Taipei, Taichung, Kaohsiung, Katy (Texas, since 2009), and Germany (since 2025), distributing into 100+ countries. Revenue is generated predominantly through one-time capital hardware sales into enterprise buyers (manufacturers, certification labs, EV and renewable energy producers, aerospace operators), supplemented by technical support and integration services. Pricing is quote-based through website inquiry or direct sales engagement rather than publicly disclosed. The company is privately held, with no parent company, no public listing, and no disclosed institutional funding.

Name

Preen

Legal name

AC Power Corp.

Website

https://preenpower.com

Company type

Private

Founded year

1989

Operating status

Operating

Headcount range

11–50 employees

Short description

Preen (AC Power Corp.) is a Taiwanese power electronics manufacturer founded in 1989 producing programmable AC and DC power supplies, regenerative grid simulators, and automated test systems for compliance and validation in renewable energy, EV, AI server, HVAC, aerospace, and other industrial markets, distributed in 100+ countries.

Ownership category

akta.pro rank

Headquarters

HQ city

Taipei

HQ country

Taiwan

HQ region

Asia

Offices7 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Technology or R&D, Personnel, Operations, Marketing or Sales

Revenue model

1. Programmable AC Power Supplies: Preen generates revenue through the sale of programmable AC power sources including AFV-P, AFV-S, AFV+, AFV, PAS/PFV, AFC, and AMV/AMF series. These are high-power testing equipment sold as one-time capital purchases to enterprises, laboratories, and manufacturers.
2. Programmable DC Power Supplies: Revenue from programmable DC power supplies including ADG-L, ADG+, and ADC series. These products range from 5kW to 300kW and are sold to industrial, automotive, aerospace, and renewable energy sectors.
3. Automatic Test Systems (ATS): Preen offers EVSE ATS and Inverter/PCS ATS solutions for automated testing of EV chargers and smart inverters. These integrated testing systems are sold as complete solutions to certification bodies, EV manufacturers, and renewable energy companies.
4. AVR & UPS Products: Revenue from solid state power conditioners (APS series) and inductive automatic voltage regulators (APH series) that provide voltage stabilization and power conditioning for industrial applications.
5. Technical Support and Services: Preen provides technical support, product inquiries, and customer service through their member center and support portals, potentially including professional services for system integration and application consulting.

Go-to-market motion3 records

Distribution channels3 records

Marketing channels7 records

Core offering

Preen (AC Power Corp.) designs, manufactures, and sells programmable AC and DC power supplies, regenerative grid simulators, automatic test systems (ATS) for EV chargers and inverters, and voltage regulation equipment (AVR/UPS). The company serves power testing and validation needs across industries including renewable energy, electric vehicles, AI servers, aerospace, semiconductors, and home appliances, offering products from 600VA benchtop units up to 2000kVA high-power systems.

Product overview

Preen (AC Power Corp.) is a power electronics company founded in 1989 offering programmable AC and DC power solutions for testing applications. The product portfolio includes: AC Power Sources (AFV-P, AFV-S, AFV+, AFV series for programmable AC testing; PAS/PFV regenerative grid simulators; AFC frequency converters; AMV/AMF 400Hz ground power units); DC Power Supplies (ADG-L and ADG+ programmable DC supplies for R&D and production; ADC rack-mount military/aerospace DC supplies); AVR & UPS (APS solid state power conditioners and APH inductive voltage regulators); Automatic Test Systems (EVSE ATS for electric vehicle chargers, Inverter/PCS ATS for smart inverters); and the ARLC automated RLC load bank for anti-islanding testing. Products range from 600VA benchtop units to 2000kVA high-power systems, supported by Preen Program control software. The company operates three major production hubs in Taiwan, Suzhou, and Tianjin with global distribution in more than 30 countries.

Differentiator

Problem solved

Functional benefit

Brands

• Preen: Primary brand name for programmable AC and DC power solutions, power testing equipment, and automatic test systems for industries including renewable energy, electronics manufacturing, and aerospace.

Products and services

• AFV-P Series Programmable AC Power Source Programmable AC power source with DC output and precision measurement, providing clean power with THD less than 0.3% at 5-100Hz, output voltage 0-350V, and frequency 5-2000Hz. Ideal for commercial, defense, and aerospace applications from design verification to mass production.
• AFV-S Series Programmable AC Power Source Compact programmable AC power source available in four output power levels (600VA, 1250VA, 2500VA, 5000VA) with low harmonic distortion. Ideal for home appliances, power connectors, LED lighting, and automation testing.
• AFV+ Series High Power Programmable AC Source High power programmable AC power source utilizing advanced PWM technology delivering THD≤0.5% and power up to 2000kVA. Features output frequency 45-120Hz (expandable to 300-840Hz) for simulating regional voltage and frequency conditions.
• AFV Series High Power Programmable AC Power Source Programmable AC power source for remote control and integration with automatic testing systems, providing precise output voltage and frequency (10-2000kVA, 45-500Hz) for home appliances, medical equipment, and lighting applications.
• PAS/PFV Series Regenerative Grid Simulator Four-quadrant AC power source capable of sourcing and sinking power with over 90% efficiency for testing grid-tied devices. PAS series up to 2000kVA, PFV series up to 400kVA. Ideal for PV inverters, PCS, and V2G testing.
• AFC Series AC Power Source/Frequency Converter AC power source/frequency converter with maximum output power up to 2000kVA, voltage 0-310V, and adjustable frequency including 45-65Hz and optional 100/120/200/240/400Hz. Provides pure sine wave output for home appliances, electronics, and medical equipment.
• AMV/AMF Series 400Hz Power Supply/Ground Power Unit Ground power units compliant with MIL-STD-704F, available as stand-alone or trailer models. AMV series: 30-180kVA, 115/200V, 400Hz fixed or 300-500Hz adjustable. AMF series: 500VA-400kVA with IP54 protection for outdoor usage.
• ADG-L Series Programmable DC Supply Programmable DC power supply with 31 models across 5kW, 10kW, and 15kW power levels. Features auto-range capability, 0-2000V output voltage, 0-2550A output current, 0.99 input power factor, and DSP+PWM technology for stability.
• ADG+ Series High Power Programmable DC Power Supply High power programmable DC power supply with single-unit power 30kW-300kW, expandable to 1800kW via master-slave parallel. Output up to 2000V and 2500A. Includes optional I-V curve simulation and solar array simulation for EV, ESS, and inverter testing.
• ADC Series Rack Mount DC Power Supply Military/aerospace DC power supply with robust circuit design and high stability. Output power 2-8kW, voltage 0-600V, current 0-267A. Features 300% overload capability for inductive loads in aerospace, military, and production testing applications.
• APS Series Solid State Power Conditioner Solid state power conditioner with high precision and fast response time using electronic compensation design. Single-phase: 1-100kVA, Three-phase: 10-300kVA. Input voltage range ±18% (±25% optional) with 2% voltage regulation for SMT production lines and medical equipment.
• APH Series Inductive Automatic Voltage Regulator Cost-effective automatic voltage regulator with output power up to 600kVA and strong overload capability. Wide regulation range -13% to +17% with high power factor ≥0.95. Designed for motor industries, CNC machines, and factory power conditioning.
• EVSE ATS / Burn-in ATS Automatic test system for AC and DC EV charger verification complying with SAE-J1772, CNS15511, GB/T 18487.1, GB/T 27930, and NB/T33001/33002 standards. Supports Type 1, Type 2, GB/T, and NACS socket types with automated test report generation.
• Inverter/PCS ATS Smart Inverter ATS Smart inverter automatic test system designed for IEEE1547.1, EN50530, NB/T32004, CNS15382 standards. Tests PV inverter input up to 2000Vdc, grid-tied voltage up to 600VL-L, and output power up to 2000kW with LVRT/HVRT and anti-islanding testing capabilities.
• ARLC Series Automated RLC Load Bank Professional-grade RLC load simulator for anti-islanding testing compliant with IEEE 1547 and 1547.1 standards. Modular design scaling from 30kW to 2000kW, simulating various islanding scenarios including voltage/frequency drift and reactive power imbalance.

Quantifiable outcome

• 65MVA world-leading annual shipped capacity for AC power sources achieved in 2011
• +5 more outcomes

Segments9 records

Ideal customer profiles6 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability4 records

Feature8 records

Scale indicators6 records

Recent moves8 records

Expansion highlights5 records

Direct peers

• Chroma ATE Inc. Taiwan-based direct competitor with overlapping programmable AC/DC power supplies, regenerative grid simulators, and automatic test systems for EV, renewable, and electronics manufacturing. Chroma is the closest head-to-head peer given geographic proximity, comparable product breadth, and similar target customer base across power electronics testing.
• EA Elektro-Automatik: German manufacturer of programmable DC power supplies, electronic loads, and regenerative power supplies targeting EV, battery, and renewable energy testing. Direct product overlap with Preen's ADG-L/ADG+ DC supplies and ARLC load banks, and a particularly relevant regional competitor in Europe where Preen is opening its new branch.
• Regatron AG: Swiss manufacturer of programmable power supplies, regenerative grid simulators, and electronic loads for PV inverter, EV, and industrial testing. Direct overlap with Preen's PAS/PFV regenerative simulators and ATS offerings, particularly for EN50530 and IEEE 1547 compliance applications.
• Kikusui Electronics Corp. Japanese manufacturer of AC/DC programmable power supplies, electronic loads, and safety testers. Directly comparable in AC source (PCR/PCZ series), DC supply, and home appliance/manufacturing test use cases that overlap with Preen's HVAC/appliance segment.
• Matsusada Precision Inc. Japanese manufacturer of high-voltage and high-power programmable DC power supplies, AC sources, and electronic loads. Comparable product mix for semiconductor, aerospace, and industrial testing customers, with overlap in Preen's ADC rack-mount and high-power ADG+ DC ranges.

Broad incumbents

• AMETEK (Programmable Power division): AMETEK's Programmable Power division operates the California Instruments, Elgar, Sorensen, and VTI brands — overlapping AC/DC power sources and regenerative grid simulators. Comparable in product category but with a much larger parent, broader T&M portfolio, and global service network.
• Keysight Technologies: Global test-and-measurement incumbent offering power supplies, grid simulators, and EV/EVSE test solutions as part of a much broader T&M portfolio. Directly comparable in EVSE ATS, renewable inverter compliance, and aerospace power testing, with substantially deeper R&D and enterprise sales coverage.
• TDK-Lambda (TDK Corporation): Global power supply manufacturer (part of TDK) offering programmable DC supplies, AC sources, and bidirectional products. Overlaps with Preen's ADG and AFV product families for industrial, semiconductor, and renewable applications, but as part of a much broader electrical components portfolio.

Emerging players

• NH Research Inc. US-based specialist in power test systems for EV, battery, and renewable applications, including bidirectional power supplies and EVSE ATS. Direct overlap in EVSE and inverter test segments; smaller than Preen by global reach but with strong North American enterprise presence.
• ITECH Electronic Co., Ltd. Taiwan/China-based manufacturer of programmable AC/DC power supplies and electronic loads. Direct product overlap with Preen's lower-power AC (AFV-S) and DC (ADG-L) ranges; primarily competes on price in the small-to-mid power segments rather than Preen's 2,000kVA high-power stronghold.

Market position

Strengths1 record

Weaknesses1 record

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/@preen1311
• LinkedInlinkedin.com/company/ac-power-corp-preen-

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Preen