For more than three decades, Sigma Engineering has evolved from a specialized power quality engineering company into one of Egypt's leading designers and manufacturers of advanced power electronics and energy management systems. Continuous investment in research and development has enabled the company to deliver innovative, high-reliability products serving industrial, utility, telecommunications, oil & gas, and commercial sectors in Egypt and international markets.

Sigma Engineering – Company Milestones

1988 – Company Foundation

Sigma Engineering was established in Egypt as an engineering company specializing in power quality solutions, providing advanced engineering services to industrial and commercial customers.

2003 – Beginning of Manufacturing

Sigma Engineering established its manufacturing facility in Obour City, approximately 20 km from Cairo. Reflecting the company's innovation-driven philosophy, the Research & Development (R&D) Department was established even before the manufacturing facility was fully completed.

2005 – First Product Launch

The company's first locally developed product, the Sigma Digital Panel Meter, was successfully introduced to the market, marking the beginning of Sigma's manufacturing journey.

2007 – Expansion into Voltage Stabilizers

Production of the Turbo Series Servo Voltage Stabilizers commenced, initially covering ratings up to 30 kVA.

2013 – DC Power Systems

Sigma expanded its product portfolio by launching the Sigmatronic IR Series Industrial Rectifiers and Battery Chargers, designed for critical industrial applications requiring high reliability and performance.

2025 – A Comprehensive Product Portfolio

Today, Sigma Engineering offers a broad range of innovative power solutions, including:

• Servo Voltage Stabilizers up to 2 MVA (turbo stabilizers)
• Hybrid Voltage Stabilizers ( synergy series) :-  this series combines electro-mechanical regulation with semiconductor-based electronic switching), available from 3 kVA to 100 kVA.
• Static Voltage Stabilizers up to 300 kVA (Matrix Series). The Matrix Series incorporates Sigma Engineering's proprietary IGBT-based topology, delivering the speed, precision, and uninterrupted output characteristic of static stabilizers while optimizing component utilization to achieve outstanding reliability and cost-effective performance.
• Sigmatronic DC Power Systems, including:
  • IR Series – Industrial Rectifiers and Battery Chargers utilizing proven thyristor technology
  • MR Series – Compact high-frequency battery chargers based on switched mode technology for generator  applications
  • LINK Series – Modular, hot-swappable telecom power systems (24 VDC / 48 VDC)
• Digital Panel Meters for both AC and DC measurements
•  Energy Meters / Power Quality Analyzers
• Industrial DC/AC Inverters for 24 VDC, 48 VDC, and 110 VDC systems
• Smart EV Charging System for Shared Parking Facilities, featuring intelligent energy management and user authentication.

Innovation at the Core

Innovation has always been the driving force behind Sigma Engineering. Several products—including the Hybrid Voltage Stabilizer, Static Voltage Stabilizer, and the Smart EV Charging System for Shared Parking—are the result of the company's own R&D efforts. These proprietary technologies represent unique market solutions, with several currently undergoing patent registration.