Enspec

What Enspec does

Enspec (legal entity Enspec Power Ltd, trading as Enspec Power) is a privately held electrical engineering company founded in 1999 and headquartered in St. Helens, Merseyside, United Kingdom, with a design and manufacturing site in Newcastle. The company operates in the power quality engineering niche, functioning simultaneously as a consultancy and an equipment manufacturer. It serves two primary customer groups: large energy generators (wind farms, solar farms, hydro plants, and battery energy storage systems) requiring grid-connection compliance, and large energy users (manufacturers, hospitals, data centres, oil and gas, mining, and pharmaceutical facilities) requiring power quality remediation.

Its offering combines engineering services (power system studies, power quality surveys, earthing systems studies, renewable energy consultancy, and preventive site services) with bespoke manufactured products (metal-enclosed harmonic filters in passive, damped, active, and hybrid configurations; reactive compensation systems including capacitor banks, STATCOMs/SVGs, and hybrids; power factor correction units; and Point-on-Wave switching systems marketed as SynchroTeq). Equipment operates across the 400V to 36kV range. The SynchroTeq Point-on-Wave switching technology, integrated under a partnership with Vizimax Inc, controls the exact angle of transformer re-energisation to prevent inrush currents, with documented outcomes such as an 8-fold inrush reduction at GE's HVDC test facility and a 132kV voltage dip reduced to 0.6% from a predicted 18% at Aikengall II Wind Farm.

The business monetizes through three revenue streams: professional engineering consultancy services, hardware sales of bespoke power quality equipment (design, manufacture, and commissioning), and site services/maintenance including framework agreements such as a three-year contract with ScottishPower Renewables covering eight wind farms. Pricing is not publicly disclosed and appears quote-based and project-specific. Go-to-market is direct enterprise/field sales via website contact, phone outreach across UK and US numbers, and technical thought-leadership at industry conferences, supported by published case studies and technical papers.

Name

Enspec

Legal name

Enspec Power Ltd

Website

https://enspecpower.com

Company type

Private

Founded year

1999

Operating status

Operating

Headcount range

11–50 employees

Short description

UK-based power quality engineering firm serving large energy generators (wind, solar, hydro, BESS) and large energy users (manufacturing, hospitals, data centres) through consultancy services and bespoke manufactured equipment including harmonic filters, reactive compensation, and SynchroTeq Point-on-Wave switching.

Ownership category

akta.pro rank

Product category

Power Quality Engineering

NAICS

Relay and Industrial Control Manufacturing (335314), Electric Power Transmission, Control, and Distribution (22112), Electric Power Generation, Transmission and Distribution (2211)

SIC

Industrial Instruments For Measurement, Display, And Control (3823), Instruments For Meas & Testing Of Electricity & Elec Signals (3825), Electronic & Other Electrical Equipment (No Computer Equip) (3600)

akta.pro primary industry

Reactive Power & Power Quality Systems EPC (STATCOM/SVC, Harmonic Filters, Capacitor Banks) (EUAEADAF)

akta.pro secondary industries

Wind Power Plant EPC (Onshore/Offshore) (EUAEAAAF), Substation & Interconnection EPC (Collector/POI Substations, Switchyards) (EUAEADAC), EHV/HVDC converter station & FACTS EPC integration services (EUADAKAL)

Keywords

• Power quality engineering
• Harmonic filters
• Reactive compensation
• Point-on-wave switching
• Electrical network consultancy

Headquarters

HQ city

St. Helens

HQ country

United Kingdom

HQ region

Europe

Offices6 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. Engineering Consultancy Services: Power quality engineering consulting services including power system studies, power quality surveys, earthing systems studies, and renewable energy consultancy. Provided by qualified power systems engineers.
2. Power Quality Products and Equipment: Design, manufacture, and commissioning of bespoke products including harmonic filters, reactive compensation capacitor banks, power factor correction units, and Point-on-Wave switching systems (SynchroTeq). Equipment ranges from 400V to 36kV.
3. Site Services and Maintenance: Preventive maintenance and operational support services for power quality equipment including transformers, reactors, capacitors, and capacitor banks. Includes maintenance framework agreements (e.g., 3-year agreement with ScottishPower Renewables covering 8 wind farms).

Go-to-market motion1 record

Distribution channels1 record

Marketing channels5 records

Core offering

Enspec is a power quality engineering consultancy and manufacturer that delivers bespoke services and equipment to large energy generators (wind, solar, hydro) and large energy users (manufacturing, hospitals, data centers, mining). The portfolio combines engineering studies and surveys (power quality, P28, harmonic compliance, earthing, protection, arc flash) with manufactured products including harmonic filters, reactive compensation capacitor banks, power factor correction units, and the proprietary SynchroTeq Point-on-Wave switching system covering 400V to 36kV.

Product overview

Enspec Power is an electrical engineering consultancy and manufacturer offering a comprehensive suite of power quality services and bespoke products. The company operates as a unified offering combining engineering consultancy services (Power System Studies, Power Quality Surveys, Renewable Energy Consultancy, Earthing Systems Studies, and Site Services) with manufactured products (Harmonic Filters, Reactive Compensation, Power Factor Correction, and Point-on-Wave Switching/SynchroTeq). The core portfolio centers on power quality engineering for large energy users and generators, with SynchroTeq Point-on-Wave Switching serving as a key technology enabling transformer switching, reactive compensation, and grid code compliance. Products include metal-enclosed harmonic filters (passive, active, damped, and hybrid configurations) and reactive compensators (capacitor banks, STATCOMs, and hybrid solutions) operating from 400V to 36kV.

Differentiator

Problem solved

Functional benefit

Products and services

• Power System Studies Engineering studies that ensure the safe, efficient, and reliable operation of electrical networks, including power quality analysis, protection coordination, arc flash studies, P28 assessments, and harmonic compliance studies for large energy generators and industrial users.
• Power Quality Surveys Detailed diagnostic surveys that establish what is happening in an electrical network, identifying power quality issues, diagnosing system failures, or providing routine system health checks for industrial and renewable customers.
• Renewable Energy Consultancy Full consultancy and facilitation service helping large energy users improve productivity and sustainability while navigating stricter grid code requirements brought about by the increase in renewables.
• Earthing Systems Studies Engineering studies that ensure electrical safety through thorough earthing system design for wind farms and other installations.
• Power Factor Correction Energy saving technology that improves energy efficiency, reduces electricity costs by eliminating Reactive Power Charges, reduces network I2R losses, and frees up available power for plant expansion, supplied to industrial and large energy users.
• Harmonic Filters Metal-enclosed harmonic filters (passive, damped, active, and hybrid configurations) that reduce harmonics to within defined parameters or dampen system resonances, available for LV and HV applications from 400V to 36kV and supplied to renewable generators and industrial energy users.
• Reactive Compensation Metal-enclosed reactive compensators (passive capacitor/shunt reactor, active STATCOM/SVG, or hybrid configurations) providing reactive power capability for voltage control and grid code compliance from 400V to 36kV.
• Point-on-Wave Switching (SynchroTeq) Proprietary SynchroTeq electronic switching technology that prevents high inrush currents associated with mechanical switching of transformers, reactors, and capacitors by controlling the exact angle of re-energisation; available as new build or retrofit, with documented 8-fold inrush current reductions and near-zero voltage dips.
• Site Services and Maintenance Preventive maintenance and operational support services for power quality equipment including transformers, reactors, capacitors, and capacitor banks, delivered via site visits and multi-year maintenance framework agreements for renewable operators and large industrial users.

Quantifiable outcome

• Transformer inrush current reduced from over 1000A peak to maximum 112A (8-fold reduction) at GE HVDC test facility
• +6 more outcomes

Named customers10 records

Segments8 records

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

Seven partnerships are on record, tiered core.

• Vizimax InccoreTechnology or IntegrationVizimax is a technology partner providing SynchroTeq Point-on-Wave switching technology. Enspec serves as solution specialists for Vizimax technologies in HV and MV switching projects, integrating Vizimax's SynchroTeq relays with their own engineering, manufacturing, and commissioning services. The partnership enables innovative switching solutions for transformers, reactors, and capacitor banks.
• VestascoreStrategic or Co-development PartnerLong-standing collaboration spanning 15 years on Wind Power Plants across the world. Vestas values Enspec's in-house engineering skills, ability to bring innovative technologies to market, and great customer service. Collaboration includes projects at Fallago Rig with Vestas turbine controls integration.
• Powersystems UKcoreImplementation/ SI/ Consulting PartnerPowersystems UK engaged Enspec to provide SynchroTeq for Aikengall II Wind Farm. Enspec engineers reviewed primary plant layout and carried out on-site commissioning. Powersystems sees SynchroTeq as a great option for mitigating inrush current on large grid-scale transformers.
• EDF Renewables UK & IrelandcoreStrategic or Co-development PartnerEnspec collaborated with EDF Renewables UK to design and install hybrid reactive power compensation system at Fallago Rig Wind Farm using Point-on-Wave switched capacitor banks working with Vestas turbine controls. EDF stated they were incredibly impressed with Enspec's expertise.
• ScottishPower RenewablescoreImplementation/ SI/ Consulting PartnerThree-year maintenance framework agreement covering transformers, reactors and capacitor banks at eight wind farms across Scotland, Northern Ireland and England. Enspec provides preventive maintenance and identifies issues before they become problems.
• GE Grid SolutionscoreStrategic or Co-development PartnerEnspec provided Point-on-Wave switching solution for GE's HVDC Valve Test Facility in Stafford. Achieved 8-fold reduction in inrush levels ensuring ER P28 compliance and protecting cast resin supply transformer from mechanical shock loading.
• Banks GroupcoreStrategic or Co-development PartnerBanks Group operates Kype Muir wind farm with two Enspec Point-on-Wave switched capacitor banks. Enspec adapted installation to include de-tuning reactors for harmonic management. Described as innovative, flexible and responsive partner.

Scale indicators6 records

Recent moves6 records

Expansion highlights5 records

Emerging players

• Arteche: Supplies power quality instruments, transformers and grid measurement solutions to utilities and renewable developers. Comparable to Enspec's power quality survey and instrument offerings for medium and high voltage networks.

Broad incumbents

• Eaton: Manufactures harmonic filters, power factor correction equipment and power quality solutions for industrial and commercial customers. Competes with Enspec's harmonic filter and PFC products at LV and MV.
• Schneider Electric: Major provider of power factor correction, harmonic filtering and active filters for industrial and data center customers. Direct product overlap with Enspec's Power Factor Correction and Active Harmonic Filter offerings, primarily at LV/MV levels.
• GE Vernova: Already an Enspec customer (GE Grid Solutions HVDC), and a competitor in grid solutions including STATCOMs, SVCs and power system studies for renewables integration. Competes on large-scale reactive compensation and grid compliance work.
• Hitachi Energy: Through its Trench and former ABB grid businesses, offers power quality and reactive compensation equipment and services used by the same renewable customers Enspec serves (utilities, wind developers). Broad portfolio across T&D, transformers and grid integration.
• ABB: Global power and automation major offering STATCOMs, harmonic filters, reactive compensation and power quality solutions across utility and industrial segments. Direct overlap with Enspec's product portfolio, but as part of a much broader portfolio and not specialising in niche UK grid-code consulting.
• Siemens Energy: Supplies FACTS devices, STATCOMs, SVCs and grid compliance solutions for renewables integration worldwide. Competes head-to-head with Enspec on large-scale reactive compensation projects, particularly where turnkey EPC delivery is required.

Others

• EnergyConomics / Reactive Power specialists (e.g., ABB Power Quality Services, Siemens Power Quality): Power quality consulting and engineering service arms of the major OEMs. Comparable to Enspec's renewable energy consultancy and power system studies offerings, though typically bundled into broader EPC contracts.

Direct peers

• Powersystems UK: UK electrical engineering contractor and Enspec customer on Aikengall II. Provides HV electrical engineering services to the wind sector, overlapping with Enspec's consultancy offering in the UK market.
• Vizimax Inc: SynchroTeq technology partner and supplier of Point-on-Wave switching relays. While commercially a partner, Vizimax's underlying relay technology competes with alternatives Enspec could integrate, and Vizimax sells into the same transformer switching and capacitor bank markets globally.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• Xx.com/EnspecPower
• Facebookfacebook.com/EnspecPower
• LinkedInlinkedin.com/company/enspec-power-ltd

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 records

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 Enspec