Power Systems International

What Power Systems International does

Power Systems International is a privately held UK-based power conversion specialist headquartered in Milton Keynes, founded in 1986, that designs and supplies custom-engineered solid-state frequency and voltage conversion systems. Its core technology uses IGBT semiconductor devices with DSP-controlled Pulse Width Modulation inverters and on-line double-conversion architecture, with no moving parts in the power path, addressing frequency conversion between 50Hz, 60Hz, and 400Hz as well as voltage transformation and UPS conditioning. Product lines span static frequency converters (including modular systems up to 1.5MVA), 400Hz ground power units for aviation, 28V DC power supplies, true online UPS systems (TWIN PRO2 1–20kVA and CUBE3+ 7.5–200kVA ranges), variable speed drives, solar inverters (EQUINOX2 family), selectable frequency and voltage converters for product testing, and an Emergency Lift Power System (Series 5 ELPS) for evacuation lifts.

The company serves nine vertical markets — aviation, shore-to-ship, lifts, education, hospitals, data centres, testing centres, solar, and hydrogen charging — with a named customer base that includes US Air Force, BAE Systems, Siemens, Network Rail, Cambridge University, Eon, KNPC, Seadrill, Babcock, Dubal, and the Natural History Museum. Revenue derives from one-time sales of custom-engineered equipment (small UPS units priced from £227, larger systems quote-based) plus ongoing repair and maintenance services. Distribution is direct through a website-led consultation model with project-based international sales spanning Japan to the USA; integrations with lift OEMs and facilities contractors (Mitie, KONE, REM Engineering) are evident on larger installations.

Products are designed to comply with BS 9999, DDA 1995, ISO 9001, ISO 14001, EN-IEC 62040-1, EN 62040-2, and VFI-SS-111. The business remains privately held with no disclosed parent, funding rounds, management team, or financial statements; product development activity in 2024 includes modular and outdoor-rated frequency converters, an AC/DC test source, and a hydrogen fuel charger line in development.

Name

Power Systems International

Legal name

Power Systems International

Website

https://powersystemsinternational.com

Company type

Private

Founded year

1986

Operating status

Operating

Headcount range

11–50 employees

Short description

Power Systems International, founded 1986 and based in Milton Keynes, UK, designs custom-engineered solid-state power conversion systems — frequency converters, UPS, ground power units, and emergency lift power systems — serving aviation, defense, maritime, healthcare, data centres, and infrastructure customers globally.

Ownership category

akta.pro rank

Product category

Industrial Power Conversion Equipment

NAICS

Power, Distribution, and Specialty Transformer Manufacturing (335311)

SIC

Power, Distribution & Specialty Transformers (3612), Switchgear & Switchboard Apparatus (3613)

akta.pro primary industry

DC-AC Inverters (Industrial inverters, standalone/embedded) (IMAGADAC)

akta.pro secondary industries

Power Electronics for Renewable & Grid-Tied Applications (Solar inverters, wind converters, grid-tie interfaces) (IMAGADAJ), Grid-Scale Power Conversion & Interconnection (PCS, Grid-Tie Inverters, Converter Stations) (IMAGAAAI), Solar Inverters, Power Optimizers & MLPE Manufacturing (EUAMAHAB)

Keywords

• Static frequency converters
• Ground power units
• Uninterruptible power supply
• Emergency lift power systems
• Variable speed drives

Headquarters

HQ city

Milton Keynes

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Power Conversion Equipment Sales: Sale of custom-engineered power conversion products including static frequency converters, GPUs, UPS systems, variable speed drives, solar inverters, and emergency lift power systems.
2. Repair and Maintenance Services: Comprehensive repair and maintenance services for frequency converters and power conversion equipment to ensure longevity and optimal performance.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels2 records

Core offering

Power Systems International designs, manufactures and supplies custom-engineered industrial power conversion systems including static frequency converters, ground power units (GPUs), online UPS systems, emergency lift power systems (ELPS), variable speed drives, solar inverters and selectable frequency/voltage converters. Established in 1986, the company uses solid-state IGBT-based PWM inverter and DSP control technology, with no moving parts in the power path, to serve aviation, maritime, healthcare, data centre, lifts, education, testing, solar and industrial sectors from its UK headquarters.

Product overview

Power Systems International is a specialist power conversion company established in 1986, offering industrial frequency and voltage conversion systems. The product portfolio centers on Static Frequency Converters (for 50/60Hz to 400Hz conversion for aviation and shore-to-ship applications), Ground Power Units (400Hz GPUs for aircraft), Uninterruptible Power Supply systems (TWIN PRO2 and CUBE3+ ranges), Emergency Lift Power Systems (for evacuation lifts), Variable Speed Drives, Solar Inverters, and Selectable Frequency & Voltage Converters. The offering also includes Hydrogen Fuel Chargers (developing). Products range from compact single-phase units to large-scale modular systems up to 1.5MVA, serving aviation, maritime, industrial, healthcare, data center, and renewable energy sectors.

Differentiator

Problem solved

Functional benefit

Brands

• TWIN PRO2 Range: Uninterruptible Power Supply systems including 1kVA to 20kVA models
• CUBE3+ Range
• VSD-PE Series
• SD 40 M Series
• SP Series
• DD Series
• PS Series
• SCSFA
• MCSFC
• SPSFC 400HZ
• Power-Boost
• Power-Trust
• Power-Spin
• Series 5 ELPS
• EQUINOX2

Products and services

• Static Frequency Converters

Quantifiable outcome

• Variable speed drives can reduce energy consumption by up to 50% when slowing motor/fan speed from 100% to 80%
• +4 more outcomes

Named customers12 records

Segments9 records

Ideal customer profiles5 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Three partnerships are on record, tiered minor and core.

• REM EngineeringminorImplementation/ SI/ Consulting Partner · 2 October 2019REM Engineering managed logistics for the Cambridge University project, handling craning and positioning of ELPS units on the fourth floor of the New Museums Site.
• MitiecoreImplementation/ SI/ Consulting PartnerCollaboration with Mitie on Network Rail project at The Quadrant, Milton Keynes. PSI installed 4x Emergency Lift Power Systems with Mitie managing overall project coordination alongside KONE.
• KONEcoreImplementation/ SI/ Consulting PartnerKONE is the lift manufacturer partner for the Network Rail installation. PSI's ELPS units were integrated with KONE lift systems at The Quadrant, Milton Keynes.

Scale indicators4 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• ABB: Global power and automation major with a large drives, UPS, and power electronics portfolio; competes head-on in industrial frequency converters and UPS, though at much greater scale and with broader product breadth than PSI.
• Vertiv: Specialist data centre and critical infrastructure power vendor; overlapping with PSI's UPS and STS offerings in data centre and hospital segments.
• Siemens: Industrial automation and power major; competes in industrial UPS and frequency conversion and is also listed as a PSI customer, illustrating the incumbent/customer duality in this market.
• Eaton: Global power management major with a deep UPS portfolio; directly competes with PSI in on-line double-conversion UPS for critical infrastructure.
• Schneider Electric: Dominant incumbent in three-phase UPS and electrical distribution; overlaps with PSI's CUBE3+ UPS in data centre, healthcare, and industrial segments.

Direct peers

• Salicru: Spanish specialist in UPS, voltage stabilizers, and power conversion with a comparable product portfolio of on-line double-conversion UPS and frequency converters; PSI even lists Salicru products in its retail pricing, confirming direct portfolio overlap.
• AEG Power Solutions: Germany-based power conversion specialist offering industrial UPS, frequency converters, and rectifier systems for defense, transit, and industrial customers — closely aligned with PSI's static frequency converter and UPS focus.
• Socomec: French power conversion specialist with a strong UPS and power quality portfolio serving data centres, healthcare, and industrial clients — direct overlap with PSI's UPS and frequency converter product lines.
• CE+T Power: Belgian modular UPS and power conversion specialist; directly comparable in modular architecture and focus on industrial/defense-grade double-conversion UPS systems.

Regional players

• Powerstar: UK-based voltage optimisation and power quality specialist; comparable in scale and geography to PSI, addressing similar industrial and commercial energy-efficiency customers.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks7 records

Key highlights7 records

Customer concentration

• Xx.com/powersystemsint
• LinkedInlinkedin.com/company/power-systems-international-limited-uk

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

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 Power Systems International