Energo-Complex Ltd.

What Energo-Complex Ltd. does

Energo-Complex Sp. z o.o. is a Polish specialist engineering firm founded in 1998 (incorporated as a limited liability company in 2004) that provides comprehensive power transformer diagnostics, service, repair, and modernization. The company is headquartered in Piekary Śląskie, Śląskie Voivodeship, with a 13-person core team and a representative office in Lignano Sabbiadoro, Italy. Its core customers are Polish electricity distribution grid operators managing large transformer fleets, notably Polskie Sieci Elektroenergetyczne S.A. (PSE), which the firm has served on high-voltage transformer projects including a first-in-Europe 250 MVA / 400 kV tap-changer replacement in 2014. Secondary customers include industrial power consumers, municipalities, and power generation/transmission utilities.

The company's technical platform is built on proprietary diagnostic methods developed in collaboration with Polish universities (Zachodniopomorski Uniwersytet Technologiczny, Politechnika Opolska, Politechnika Śląska). Key proprietary technologies include the RVM-PDC combined insulation moisture measurement method, FDS dielectric spectroscopy, FRA-VM combined frequency response and vibroacoustic analysis, and the TrafoGrade asset management system with 15 diagnostic parameters across four modules. The firm also manufactures the WP-EC series of OLTC position indicators and MK-EC encoders, and operates an oil regeneration service using ARRAS MAXEI technology that can restore oil properties to near-new condition at 50–60% of replacement cost. Its wholly owned subsidiary OBRE Sp. z o.o. (est. 2012) operates Poland's most modern oil analysis laboratory.

Energo-Complex generates revenue through a multi-stream model: professional services (diagnostics, repair, modernization, consulting, training), hardware sales (spare parts, MR-distributed tap changers, proprietary WP-EC devices), and event/training monetization. The firm is the exclusive commercial and service representative for Maschinenfabrik Reinhausen (MR) in Poland — a significant distribution channel. Pricing for core services is not publicly disclosed and is quoted upon inquiry; training programs are priced at PLN 4,450–6,450 per participant. The company also runs the recurring 'Transformatory w Eksploatacji' and 'Łączniki w Eksploatacji' conferences and the Academy of Energy Transformation (ATE), which function as both GTM channels and a growing education revenue stream. A new OZE / electroprosumer resilience service line extends the offering into the renewable energy transition. The company is privately held, with no disclosed institutional investors, and is led by President Marek Szrot.

Name

Energo-Complex Ltd.

Legal name

ENERGO-COMPLEX Sp. z o.o.

Website

https://energo-complex.pl

Company type

Private

Founded year

1998

Operating status

Operating

Headcount range

11–50 employees

Short description

Energo-Complex Sp. z o.o. is a Polish specialist engineering firm providing power transformer diagnostics, repair, modernization, and asset management services for Polish distribution grid operators, industrial power consumers, and utilities, leveraging proprietary diagnostic methods and exclusive MR representation.

Ownership category

akta.pro rank

Product category

Power Transformer Lifecycle Services

NAICS

Electronic and Precision Equipment Repair and Maintenance (811210), Electric Power Distribution (221122), Electric Power Transmission, Control, and Distribution (22112)

SIC

Electric Services (4911), Instruments For Meas & Testing Of Electricity & Elec Signals (3825), Services-Miscellaneous Repair Services (7600)

akta.pro industry

PRIMARYEUAEALAE

Transformer & Reactor Refurbishment / Replacement Programs

Energy, Utilities & Environment/Energy Infrastructure & Services (EPC, O&M, Field Services)/Power Plant & Grid Modernization / Retrofit Services

SECONDARYEUADAKAE

Commissioning, testing & energization services (HVT, relay testing, SAT)

Energy, Utilities & Environment/Electric Transmission & Distribution (T&D)/T&D Construction, Engineering & EPC Services

SECONDARYEUAEABAI

Testing, Commissioning & Energization Services (HV)

Energy, Utilities & Environment/Energy Infrastructure & Services (EPC, O&M, Field Services)/Transmission & Substation EPC (High Voltage)

SECONDARYIMAGAAAC

Substation Systems & Integration (EPC, Engineering, Protection, Commissioning)

Industrials, Manufacturing & Construction/Electrical Equipment & Industrial Electronics/Power Generation & Grid Equipment (Transformers, Switchgear, Substations)

Keywords

• Power transformer diagnostics
• Transformer repair services
• Transformer asset management
• Oil regeneration services
• Partial discharge testing

Headquarters

HQ city

Piekary Śląskie

HQ country

Poland

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Transformer Diagnostic and Assessment Services: Advanced diagnostic services for power transformers including oil testing, partial discharge measurements (WNZ), insulation moisture assessment (FDS, RVM-PDC), winding deformation analysis (FRA-VM), and technical condition evaluations. Services are performed on-site or at the workshop and generate detailed protocol reports.
2. Repair and Modernization Services: Remonty i modernizacja transformatorów — includes repairs, oil regeneration and treatment, tap changer replacement, core and winding re-pressing, drying of insulation, cooling system upgrades, and painting. Performed on-site or in workshop with modern hall and crane at headquarters.
3. Spare Parts and Components Sales: Sale of spare parts, components, and accessories for power transformers, including on-load tap changers (MR brand), thermometers, moisture absorbers, oil level indicators, gas relays, cooling system control cabinets, and contact components for PO, VEL, and MR type tap changers.
4. Control and Measurement Equipment Sales: Manufacturing and sale of diagnostic and monitoring devices including WP-EC position indicators, NWP-EC universal transmitters, and MK-EC encoders for tap changer position detection and control.
5. Technical Consulting: Technical advisory services covering transformer selection, manufacturing supervision, transport and installation oversight, and acceptance testing. Includes preparation of technical tender documentation, producer evaluation, and specialized measurements during acceptance.
6. Training and Workshops: Fee-based training programs for management and specialists in power engineering. The Ustka 2026 training covers transformer asset management and monitoring under energy transition conditions. Pricing from PLN 4,450 to PLN 6,450 per participant.
7. Electroprosumer Resilience Services (OZE): Services related to energy transition including electroprosumer resilience audits, design and implementation of OZE protection structures, and processes for achieving economically justified energy self-sufficiency for municipalities and businesses.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels6 records

Core offering

Energo-Complex provides comprehensive diagnostic, service, repair, and modernization solutions for power transformers, including advanced non-invasive measurement methods (FDS, RVM-PDC, SFRA, FRA-VM, partial discharge), oil regeneration, and the proprietary TrafoGrade asset management system. Services are delivered on-site at client transformer locations or in the company's workshop in Piekary Śląskie, complemented by sales of the WP-EC position indicator series and spare parts for Polish electricity distribution and transmission operators, industrial power consumers, and municipalities.

Product overview

Energo-Complex Ltd. is a Polish specialist company providing comprehensive solutions for power transformer diagnostics, service, repair, and modernization. The portfolio is organized around a core platform — TrafoGrade (a transformer asset management system with four modules for technical condition assessment and system importance evaluation) — supported by a suite of specialized diagnostic services including advanced diagnostics (FDS, RVM-PDC, SFRA, FRA-VM, partial discharge, bushing diagnostics), oil regeneration and treatment, and SF6 equipment service. The company also manufactures its own line of measurement and control instrumentation — the WP-EC position indicator series (NWP-EC 03 transmitters, WP-EC 01/02 receivers, and MK-EC encoders) for on-load tap changers. Additional offerings encompass technical consulting, high-voltage circuit breaker diagnostics, renewable energy and electroprosumer resilience services (Strefa OZE), and a comprehensive spare parts database. Services are delivered both on-site at client locations and at the company's workshop facility in Piekary Śląskie.

Differentiator

Problem solved

Functional benefit

Products and services

• TrafoGrade – Transformer Asset Management System A four-module transformer management system co-developed with Zachodniopomorski Uniwersytet Technologiczny and Politechnika Opolska, applying a point-based scale across 15 diagnostic parameters (including DGA, FRA-VM, moisture content, cellulose degradation, and oil condition) to classify transformers into simplified (U), normal (N), and special supervision (S) operational groups. Designed for electricity distribution and transmission operators to optimize lifecycle and maintenance planning.
• Advanced Transformer Diagnostics Comprehensive diagnostic services for power transformers including moisture content determination via FDS, RVM-PDC, and PDC methods; mechanical deformation identification via SFRA; FRA-VM vibro-acoustic testing; partial discharge measurements; and bushing diagnostics. Performed on-site or at the workshop, with detailed protocol reports delivered to the customer.
• Oil Regeneration and Treatment Services Regeneration and treatment of insulating oil using the ARRAS MAXEI mobile REGEN station with MAS 6000 vacuum aggregate and sorption columns to remove aging products (organic acids, aldehydes, ketones, unsaturated hydrocarbons) and restore oil properties comparable to new oil, with only ~2% waste oil byproduct. Can be performed while the transformer is online.
• Transformer Service, Repair, and Modernization Full-range transformer services including vacuum drying, oil regeneration, tap changer replacement, core and winding re-pressing, cooling system modernization, and paint coating restoration, delivered on-site or in the company's workshop hall with crane at Piekary Śląskie. Aimed at extending transformer lifespan by up to 15 years at approximately 15–20% of new unit cost.
• Partial Discharge (PD/WNZ) Measurement Services On-site partial discharge measurements using electrical, acoustic (EA), and UHF methods with the Montesto 200 system, covering both off-line testing and on-line monitoring for power transformers.
• HV Circuit Breaker Diagnostics Diagnostic testing of high-voltage circuit breakers including static resistance measurement, timing analysis, dynamic resistance, insulation testing, and SF6 gas analysis.
• SF6 Insulated Equipment Service Diagnostic and repair services for electrical equipment using sulfur hexafluoride (SF6) insulation, including leak testing, safe gas evacuation, and regeneration.
• Technical Consulting Consulting services covering producer selection, production supervision, transport, installation, and post-installation testing of transformers for industrial and utility customers.
• Renewable Energy and Electroprosumer Services (Strefa OZE) Energy transition services including electroprosumer resilience assessments, design and implementation of OZE protection structures, photovoltaic installations, energy storage solutions, and off-grid capability consulting for municipalities and commercial entities.
• WP-EC Series Position Indicators and Encoders Family of devices for detecting the position of on-load tap changers (OLTC), including contact matrices, BCD and RS-485 encoders (MKEC-1, MKEC-2, MKEC-3), universal OLTC position transmitters (NWP-EC 03), and receivers (WP-EC 01-2a, WP-EC 01-4a, WP-EC 02). Features include digital counters with FLASH memory, RS-485 communication with DNP 3 protocol, voltage measurement with digital display, and configurable protection against unjustified tap changes.
• Spare Parts and Components for Power Transformers Sale of spare parts, components, and accessories for power transformers, including Maschinenfabrik Reinhausen (MR) on-load tap changers, thermometers, moisture absorbers, oil level indicators, gas relays, cooling system control cabinets, and contact components for PO, VEL, and MR type tap changers.
• Training and Workshops for Power Engineering Personnel Fee-based training programs for management and specialists in power engineering, covering transformer asset management and monitoring under energy transition conditions. The Ustka 2026 training is priced from PLN 4,450 to PLN 6,450 per participant across three tiers (training only, training plus hotel, and premium package with extra night).

Quantifiable outcome

• Transformer lifespan extension of up to 15 years through proper diagnosis and targeted modernization
• +7 more outcomes

Named customers2 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

Eleven partnerships are on record, tiered core and minor.

• Politechnika ŚląskacoreStrategic or Co-development Partner · 1 January 2024Part of a consortium with Energo-Complex and ZUT's electrical faculties. The consortium signed an agreement in 2024 to launch post-graduate studies in energy transformation at Politechnika Śląska and ZUT. The first semester began in October 2024. Also a partner in organizing the Academy of Energy Transformation (ATE) and 'Transformatory w Eksploatacji' conference.
• Stowarzyszenie Elektryków Polskich (SEP) – Koło nr 59coreStrategic or Co-development Partner · 1 January 2020SEP Circle No. 59 has been operating at Energo-Complex since 25 May 2020. Named after the late Prof. Jan Subocz. The circle has 16 members including company employees. Energo-Complex supports SEP's mission to promote electrical engineering and professional development of engineers. The circle received the Medal im. prof. Lucjana Nehrebeckiego in 2021.
• OBRE Sp. z o.o.coreStrategic or Co-development Partner · 1 January 2012Oil laboratory company established in 2012 as part of the ENERGO-COMPLEX Group, following an initiative by scientific communities collaborating with Energo-Complex from Poland and abroad. OBRE operates the most modern oil analysis laboratory in Poland, offering complete analyses of insulating-cooling liquids per IEC, PN, ASTM standards. Published the multi-volume series 'Eksploatacja Transformatorów Energetycznych' and the book 'Ocena stanu technicznego i zarządzanie populacją transformatorów'. Website: www.obre.pl
• Maschinenfabrik Reinhausen GmbHcoreChannel Partner/ Reseller/ DistributorEnergo-Complex serves as the exclusive commercial and service representative for Maschinenfabrik Reinhausen (MR) in Poland. The partnership includes sales of MR on-load tap changers, drives, thermometers, oil level indicators, and accessories. The company also provides warranty and post-warranty service for MR equipment. The partnership enabled many spectacular projects including the first-in-Europe tap changer replacement in a 250 MVA / 400 kV transformer.
• ARRAS MAXEIcoreTechnology or IntegrationFrench group ARRAS MAXEI, with over 100 years of history, specializes in designing and manufacturing machines and equipment for the electrical power industry. Based on ARRAS-MAXEI technology, Energo-Complex introduced oil regeneration services using the REGEN mobile station and MAS 6000 device. The regeneration process removes aging products from transformer oil, restoring properties comparable to new oil.
• Zachodniopomorski Uniwersytet Technologiczny w Szczecinie (ZUT)coreStrategic or Co-development PartnerLong-term R&D cooperation with ZUT on joint projects introducing innovative technologies in services. Co-developed the TrafoGrade transformer management system and the combined RVM-PDC measurement method. ZUT is also a partner in organizing the 'Transformatory w Eksploatacji' conference. In 2024, a consortium agreement was signed between Energo-Complex, ZUT's electrical faculties, and Politechnika Śląska to launch post-graduate studies in energy transformation.
• Politechnika OpolskacoreStrategic or Co-development PartnerCo-development partner in R&D projects introducing innovative technologies in transformer services. Jointly developed the TrafoGrade transformer management system and the combined RVM-PDC measurement method for transformer insulation assessment.
• KGHM Polska Miedź SAminorGTM or Marketing PartnerKGHM Polska Miedź served as a strategic partner for the Academy of Energy Transformation (ATE) conference in 2023. The mining company is undergoing its own energy transformation process and participated as a partner in knowledge-sharing events organized by Energo-Complex.
• Hotel Grand Lubicz, UstkaminorOthersVenue partner for the annual transformer asset management training program (Ustka). Training events are held at the hotel in Ustka, Poland, with Energo-Complex as the organizer.
• Stowarzyszenie Dolivo im. Michała Doliwo-DobrowolskiegominorStrategic or Co-development PartnerProfessional association co-founded by Energo-Complex CEO Marek Szrot, focused on organizing conferences, publishing educational materials, and providing expert assessment of legal solutions in electrical law. Named after Prof. Michał Doliwo-Dobrowolski, a pioneering electrical engineer. Inaugural meeting held at Energo-Complex headquarters.
• CIGRE (Conseil International des Grands Réseaux Électriques)minorOthersInternational Council on Large Electric Systems, operating since 1921 with 16 study committees covering technical, economic, and legal-regulatory aspects of power systems. Energo-Complex engineers participate in CIGRE activities and present achievements at international CIGRE sessions held in Paris.

Scale indicators5 records

Recent moves9 records

Expansion highlights6 records

Regional players

• Wilson Transformer Company: Australian transformer manufacturer and service provider offering diagnostics, refurbishment, and oil regeneration. Comparable service portfolio to Energo-Complex, including mobile oil regeneration units, though operating in a different geography (APAC vs. CEE).

Broad incumbents

• KEMA Labs (CESI): Independent power-system testing and certification laboratory operating high-voltage and high-power labs. Comparable to Energo-Complex's testing/diagnostic capabilities and OBRE laboratory, particularly for acceptance testing and specialized transformer measurements.
• GE Vernova (Grid Solutions): Global grid equipment OEM providing transformers, switchgear, and asset-management software including monitoring and diagnostic services. Comparable to Energo-Complex on transformer fleet management and competes for utility modernization contracts in Europe.
• Siemens Energy: Global energy technology OEM and service provider with transformer manufacturing, diagnostics, and lifecycle services across transmission and distribution. Overlaps with Energo-Complex on transformer condition assessment, repair, and modernization for Polish and European utility customers.
• Hitachi Energy: Global transformer manufacturer and grid-services provider offering diagnostics, refurbishment, and modernization for high-voltage transformers. Competes with Energo-Complex for large utility service contracts in Poland and was the original equipment manufacturer of the Gdańsk tap-changer replaced by Energo-Complex in 2014.

Direct peers

• OMICRON electronics: Austrian manufacturer of diagnostic and testing equipment for power systems, including transformer diagnostic instruments (e.g., FRAnalyzer, DIRANA for FDS). Highly comparable to Energo-Complex's FDS, RVM-PDC, and FRA-VM measurement capabilities, both supplying tools and services used to assess transformer insulation and mechanical integrity.
• Doble Engineering: US-based specialist in transformer diagnostics, insulation testing, and asset-management software for utilities. Comparable to Energo-Complex's advanced diagnostics and TrafoGrade offering, both targeting fleet-level transformer condition assessment and lifecycle decision support.
• Maschinenfabrik Reinhausen (MR): German global leader in on-load tap-changers and voltage regulation equipment. Energo-Complex is MR's exclusive commercial and service representative in Poland and depends on MR technology for tap-changer replacement projects; their product offerings (tap changers, drives, accessories) overlap directly with MR's catalog in the Polish market.
• Megger: Provider of electrical test and measurement equipment widely used in transformer diagnostics, including insulation resistance testers, oil testers, and winding analyzers. Overlaps with Energo-Complex's measurement-services business and competes for diagnostic-instrument spend within utility customers.

Emerging players

• Highvolt Prüftechnik Dresden: German specialist in high-voltage on-site testing and diagnostics, including transformer and cable testing services. Comparable niche focus on field-based HV diagnostics and testing, overlapping with Energo-Complex's advanced diagnostics and acceptance-testing services.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/@AkademiaTransformacjiEnergetycznej
• LinkedInlinkedin.com/company/energo-complex-sp--z-o-o-

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles6 records

Subsidiaries1 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 Energo-Complex Ltd.