High Voltage Technology
High Voltage Technology SA provides high voltage engineering, substation construction, and reactive power compensation services for electricity transmission infrastructure in Southern Africa, primarily serving Eskom, regional state utilities, and major mining and industrial customers across multiple African markets.
- Company typePrivate
- Founded1994
- HeadquartersMidrand, South Africa
- Headcount51–100
- GTM typeB2B
- OfferingServices
What High Voltage Technology does
High Voltage Technology SA (Pty) Ltd (HVT) is a South African specialist engineering contractor providing high voltage electrical infrastructure solutions for the electricity transmission and distribution industry. Founded in 1994 and headquartered in Midrand, the company delivers design, supply, construction, installation, testing, and commissioning services for substations and overhead lines up to 765kV, supported by 8 fully equipped crews and 68 trained site staff. Its core technical differentiators are Reactive Power Compensation (including FACTS and HVDC), where it has completed over 600 projects and supplied over 95% of Eskom's High Voltage Shunt Capacitor Banks, and Control & Protection systems delivered through its subsidiary Intelligent African Technologies. Additional service lines include transformer field services, switchgear maintenance, civil and earthwork, earthing systems, and renewable energy services through subsidiary Electrovaya Construction.
HVT operates a hybrid revenue model combining professional services (EPC, installation, maintenance) with hardware sales, acting as local agent and installer for major international OEMs including Siemens, ABB, Hyundai Heavy Industries, Hyosung, Trench, Hapam, PPC, Smit, and Transformco. The go-to-market is enterprise field sales targeting Eskom and other state-owned utilities across Southern Africa (NamPower, Botswana Power, ZESA, Zesco, KPLC, EDM), as well as major mining and industrial customers (Anglo American, BHP Billiton, De Beers, Impala, Sasol) and infrastructure clients such as SANRAL. The company is 100% black-owned with BBBEE Level 1 rating, holds CIDB ratings of 8EP PE and 7CE PE, and is ISO 9001:2015 certified — credentials that materially influence South African utility procurement. Pricing is project-based with custom quotations tied to voltage ratings and scope, and no disclosed pricing models exist publicly.
High Voltage Technology firmographics
Firmographics- Name
- High Voltage Technology
- Legal name
- High Voltage Technology SA (Pty) Ltd
- Website
- https://hvt.co.za
- Company type
- Private
- Founded year
- 1994
- Operating status
- Operating
- Headcount range
- 51–100 employees
- Short description
- High Voltage Technology SA provides high voltage engineering, substation construction, and reactive power compensation services for electricity transmission infrastructure in Southern Africa, primarily serving Eskom, regional state utilities, and major mining and industrial customers across multiple African markets.
- Ownership category
- akta.pro rank
High Voltage Technology industry classification
Industry- Product category
- High Voltage Electrical Engineering Services
- NAICS
- Power and Communication Line and Related Structures Construction (237130), Electrical Contractors and Other Wiring Installation Contractors (23821), Electric Power Transmission, Control, and Distribution (22112)
- SIC
- Electrical Industrial Apparatus (3620), Switchgear & Switchboard Apparatus (3613), Power, Distribution & Specialty Transformers (3612), Instruments For Meas & Testing Of Electricity & Elec Signals (3825)
- akta.pro primary industry
- Switching Stations & Reactive Power Facilities (Capacitor Banks, SVC/STATCOM) (IMAFAHAH)
Keywords
Where High Voltage Technology is headquartered
LocationHeadquarters
- HQ city
- Midrand
- HQ country
- South Africa
- HQ region
- Africa
Offices3 records
Markets served
High Voltage Technology business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Operations, Supply Chain, Infrastructure, Technology or R&D, Marketing or Sales
Revenue model
- Substation Construction & Services: Design, supply, construction and installation of substation site services from equipment installation to turnkey substation construction. Services include civil works, equipment erection, cabling, commissioning.
- Substation Equipment Supply: Supplier and installer of high voltage substation equipment as agent of major international OEMs. Equipment includes power transformers, instrument transformers, insulators, bus bars, circuit breakers, disconnectors, switchgear.
- Renewable Energy Services: Through subsidiary Electrovaya Construction - providing electrical engineering services to power industry including substation design, maintenance, and full O&M for renewable energy plants.
Go-to-market motion1 record
Distribution channels1 record
Marketing channels3 records
High Voltage Technology product offering
Product offeringCore offering
High Voltage Technology SA (Pty) Ltd designs, supplies, constructs, installs, commissions, and maintains high voltage electrical power transmission and distribution infrastructure for utilities, mining, industrial, and renewable energy customers. Its offering spans Reactive Power Compensation (RPC/FACTS/HVDC), Control & Protection systems, Substation Site Services, Substation Equipment supply, Transformer Field Services, Switchgear Services, Civil & Earthwork, and Lines, supported by 8 fully equipped crews trained and accredited up to 765kV. The company operates as both a turnkey engineering contractor and as a local agent for major international high voltage OEMs.
Product overview
High Voltage Technology SA (Pty) Ltd provides a comprehensive suite of integrated high voltage engineering services and solutions for the electricity transmission and distribution industry. The company operates multiple specialized divisions including Reactive Power Compensation (RPC/FACTS/HVDC), Control & Protection, Substation Site Services, Substation Equipment supply, Transformer Field Services, Switchgear Services, Civil & Earthwork, Lines, Earthing Systems, and Renewable Energy Services. The portfolio includes subsidiary operations (Electrovaya Construction for renewable projects and Intelligent African Technologies for Control & Protection). Services range from design and consulting through to turnkey construction, installation, testing, commissioning, and ongoing maintenance, supporting voltages from medium (11kV) up to 765kV transmission systems. The company operates as both a service provider and equipment supplier through partnerships with major international OEMs.
Differentiator
Problem solved
Functional benefit
Products and services
- Reactive Power Compensation (RPC), FACTS & HVDC Comprehensive solutions in Reactive Power Compensation (RPC), Flexible AC Transmission Systems (FACTS), High Voltage Direct Current (HVDC) and Power Quality including capacitor banks, shunt/series reactors, dynamic compensation systems, voltage regulation, and harmonic filtering, delivered for power utilities and industrial customers from 3.3kV to 765kV.
- Control & Protection Complete range of products and solutions in Protection, Telecommunication, Measurement, Automation & Control (PTMA&C) for high voltage substations, delivered through subsidiary Intelligent African Technologies and partnerships with international OEMs.
- Substation Site Services Design, supply, construction and installation of substation site services from equipment installation to turnkey substation construction, including civil works, steel structures, equipment erection, cabling, busbars, stringing, earthing, and commissioning up to 765kV.
- Substation Equipment Supply Supplier and installer of high voltage substation equipment as agent of major international OEMs, including power transformers (5-2000 MVA), instrument transformers, insulators, busbars, line fittings, circuit breakers, disconnectors, capacitors, reactors, switchgear, and mini substations.
- Civil & Earthwork Civil construction services including drainage layout, excavation & grading, reinforced concrete, control room construction, paving, kerbing, cable racking, vegetation control, safety fencing, and signage for substation and infrastructure projects.
- Lines (Overhead Transmission Line Services) Overhead line services and infrastructure construction for transmission and distribution systems.
- Transformer Field Services Comprehensive transformer maintenance including oil leaks maintenance, rigging, tap changer services, oil purification, and high voltage testing for utility and industrial power transformers.
- Switchgear Services Switchgear installation, maintenance, testing and commissioning for oil filled and SF6 circuit breakers including annual inspections, periodic maintenance, major overhauls, and condition monitoring.
- Earthing Systems Trenching & installation of earthmats, earth rods, jointing (Exo-weld and Silbra-Alloy), and earth resistance testing for substation earthing systems.
- Renewable Energy Services Electrical engineering services for renewable projects through subsidiary Electrovaya Construction, including substation EPC balance of plant, substation design and maintenance, full O&M for renewable energy plants, and HV/MV design, supply and installation.
- High Voltage Testing Comprehensive HV testing services including 5/10 KV Meggar tests, impedance tests, magnetization tests, winding ratio tests, polarity tests, bushing and winding tan delta tests, SFRA tests, tapchanger divertor continuity tests, winding DC resistance tests, CT tests, and protection commissioning tests.
- Electrovaya Construction (Subsidiary) Subsidiary company for renewable energy projects, providing electrical engineering services including substation EPC balance of plant, substation design and maintenance, full O&M for renewable energy plants, and HV/MV design, supply and install.
Quantifiable outcome
- Successfully completed over 600 reactive power projects from 3.3kV to 765kV
- +2 more outcomes
Companies that use High Voltage Technology
Customer profileNamed customers10 records
Segments3 records
Ideal customer profiles3 records
High Voltage Technology technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature3 records
High Voltage Technology partnerships and signals
Strategic signalPartnerships
15 partnerships are on record, tiered core.
- Trench ElectriccoreHVT represents Trench Electric for Reactors, Instrument transformers, and Line traps as local representative and agent for major international OEMs.
- Hapam BVcoreHVT represents Hapam BV for Disconnectors as local representative and agent.
- PPC InsulatorscoreHVT represents PPC Insulators as local representative and agent.
- AlcancoreHVT represents Alcan for tubular busbars as local representative and agent.
- RibecoreHVT represents Ribe for clamps and fittings as local representative and agent.
- SmitcoreHVT represents Smit for Power Transformers as local representative and agent.
- HyosungcoreHVT represents Hyosung for MV + HV switchgear, Power Transformers, and GIS as local representative and agent.
- Hyundai Heavy IndustriescoreHVT represents Hyundai Heavy Industries for MV + HV switchgear, Power Transformers, and GIS as local representative and agent.
- TransformcocoreHVT represents Transformco for Distribution Transformers as local representative and agent. CEO Boogie Naidoo provides leadership to Transformco.
- SiemenscoreHVT represents Siemens for HV circuit breakers as local representative and agent.
- ABBcoreHVT represents ABB as local representative and agent. HVT has references with international Electrical Engineering groups including ABB.
- Intelligent African TechnologiescoreHVT created subsidiary specializing in Control and Protection, strengthening its Control & Protection division through this internal venture.
- Electrovaya ConstructioncoreHVT subsidiary for renewable projects. Primarily uses Electrovaya Construction for renewable energy sector involvement including sub EPC balance of plant, substation design, and full O&M for renewable energy plants.
- Haefely Trench GroupcoreOriginally established in 1994 as the agent for Haefely Trench Group in Southern Africa.
- HTSA Power EconomycoreMerged with HTSA Power Economy in August 2006, resulting in re-alignment of shareholdings and management and strengthening of marketing and design capabilities for Substation and Reactive Power Compensation projects.
Scale indicators6 records
Recent moves6 records
Expansion highlights6 records
High Voltage Technology competitors and assessment
Company assessmentEmerging players
- Elsewedy Electric: Egyptian pan-African electrical EPC and equipment manufacturer expanding aggressively across Sub-Saharan Africa. Comparable offering of HV substations, cables and turnkey power infrastructure in the same regional markets.
- TBEA: Chinese state-linked transformer and EPC contractor actively bidding on African HV substation and transmission projects. Comparable end-product (transformers and substations), represents a low-cost competitive threat in Africa.
Broad incumbents
- Siemens Energy: Global supplier of HV circuit breakers, transformers and grid solutions; HVT represents Siemens for HV circuit breakers in Southern Africa. Comparable at the equipment level and as a competing EPC for large utility tenders.
- State Grid Corporation of China: World's largest utility and a major African T&D EPC contractor through concessional financing. Adjacent competitor for large HV substation packages across the same African geographies HVT serves.
- ABB (Electrification): Global OEM and EPC incumbent for HV substations, switchgear and FACTS equipment. HVT acts as ABB's local representative; ABB increasingly bids directly on African HV projects, making it both an upstream partner and competitive threat.
- Schneider Electric: Global electrical equipment and grid solutions provider with strong African presence. Overlaps with HVT in switchgear, substation components and power-quality equipment across utility and industrial segments.
Direct peers
- Zest WEG: South African electrical engineering group supplying motors, generators, transformers and HV electrical solutions to utilities, mining and industry. Comparable customer base and equipment-supply-plus-services model.
- Conco Energy Solutions: South African specialist contractor for HV transmission substations and power line construction. Directly competes for the same Eskom and regional utility tenders as HVT.
- Powertech: South African electrical services and HV substation contractor serving Eskom and industrial customers. Closely comparable operating model: turnkey HV construction, testing/commissioning and OEM equipment supply to utilities.
- ACTOM: South African electrical engineering group manufacturing and servicing HV switchgear, transformers and substations. Directly comparable as a domestic HV substation EPC and equipment supplier with utilities as primary customers.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat4 records
Key risks6 records
Key highlights7 records
Customer concentration
High Voltage Technology social profiles
Digital presenceHigh Voltage Technology compliance and trust
Trust signalCompliance4 records
High Voltage Technology financial estimates
Financial estimateRevenue estimate
Valuation estimate
High Voltage Technology leadership team
Management profileNumber of profiles
Profiles1 record
High Voltage Technology subsidiaries and ownership
Company hierarchySubsidiaries2 records
High Voltage Technology funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
High Voltage Technology M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about High Voltage Technology
What does High Voltage Technology do?
High Voltage Technology SA (Pty) Ltd designs, supplies, constructs, installs, commissions, and maintains high voltage electrical power transmission and distribution infrastructure for utilities, mining, industrial, and renewable energy customers. Its offering spans Reactive Power Compensation (RPC/FACTS/HVDC), Control & Protection systems, Substation Site Services, Substation Equipment supply, Transformer Field Services, Switchgear Services, Civil & Earthwork, and Lines, supported by 8 fully equipped crews trained and accredited up to 765kV. The company operates as both a turnkey engineering contractor and as a local agent for major international high voltage OEMs.
Is High Voltage Technology a public or private company?
High Voltage Technology is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was High Voltage Technology founded?
High Voltage Technology was founded in 1994. It employs 51 to 100 people.
Where is High Voltage Technology based?
High Voltage Technology is headquartered in Midrand, South Africa, in the Africa region.
How does High Voltage Technology make money?
Three revenue lines are on record. Substation Construction & Services are the primary driver. The others are substation Equipment Supply and renewable Energy Services.
Who are High Voltage Technology's main competitors?
Emerging players on record are Elsewedy Electric and TBEA. Broad incumbents are Siemens Energy, State Grid Corporation of China, ABB (Electrification) and Schneider Electric. Direct peers are Zest WEG, Conco Energy Solutions, Powertech and ACTOM.
Does High Voltage Technology have an API?
No public API is recorded for High Voltage Technology.
What industry is High Voltage Technology in?
High Voltage Technology's product category is High Voltage Electrical Engineering Services. Its primary akta.pro industry code is IMAFAHAH, Switching Stations & Reactive Power Facilities (Capacitor Banks, SVC/STATCOM). Its NAICS code is 237130 and its SIC code is 3620.