Lemi Trafo: The Energy Heart of the Smart City
Today we draw your attention to Lemi Trafo - a company that does not just manufacture equipment, but creates the critical components for the energy transformation of the modern urban environment.
Industrial and technological profile
Founded in 1996 with a production base in Pernik, today Lemi Trafo is among the leading European manufacturers of oil and dry-type distribution transformers (from 25 kVA to 25,000 kVA).
The company operates in its own modern base on an area of over 18,000 sq. m., including specialized halls and logistics areas. With a capacity of over 5,000 transformers per year (equivalent to 2,890 MVA) and an implemented five-tier integrated management system (ISO 9001, 14001, 45001, 50001 and 27001), the company is a benchmark for quality on the international market. Lemi Trafo is strongly export-oriented: 86.34% of production is sold abroad, and in 2023 this share reached an impressive 92%. In addition to Bulgaria, the company is a key supplier in Europe, Africa, the Middle East and Vietnam, partnering with energy giants such as EVN Group, E.ON SE, Enel Group, CEZ Group and EnBW. The main export destinations are currently Germany, Austria, the Czech Republic and Sweden.
Economic upturn and scale
The company demonstrates sustainable growth that significantly exceeds the average for the sector:
- Sustainability: In 2022, revenues exceed BGN 59.6 million, reporting a 7.5% average annual growth compared to 2016.
- Record jump: 2023 was a turning point - sales revenues reached BGN 135 million, which is an increase of over 125% compared to the previous year.
- Capacity: The over 4,300 transformers sold in 2023 bring the plant closer to its maximum operating capacity.
This rise positions Lemi Trafo as a "large enterprise" according to EU criteria, which opens the door to participation in large-scale strategic European consortia.
Role in the Roadmap of the City of Sofia
The transformation of Sofia into a smart ecosystem requires a radical change in the infrastructure. Lemi Trafo's technologies fit naturally into the Roadmap of the city according to our criteria and expectations:
- Smart Grids: Designed to integrate RES and maintain stability under dynamic load in "smart" neighborhoods.
- Electromobility: Solutions for effective scaling of the power of charging stations in an urban environment without compromising on safety.
- Digitalization: The ISO 27001 certificate guarantees readiness for the implementation of IoT solutions for real-time energy monitoring.
European partnership and sustainable development
Lemi Trafo has the capacity to be a leading partner in international programs:
- LIFE and EIU program: The focus on energy efficiency makes the company an ideal candidate for projects in the direction of Clean Energy Transition and the creation of climate-neutral cities.
- Green Economy: Through national programs, the company is modernizing its capacities for the production of environmentally friendly dry transformers with low noise levels.
- Expertise: The ISO 50001 standard is proof of a commitment to resource conservation – know-how that can be applied in municipal cost optimization projects.
Conclusion
Lemi Trafo is not just an industrial manufacturer, but a strategic partner for Sofia and the Cluster. Combining traditional engineering excellence with a vision for a sustainable and connected city, the company is a driver of innovations that make energy smarter and more accessible.
More about the company at: www.lemi-trafo.com


