Digital electricity for energy transition

High Voltage Systems

Long experience, strong know-how, cutting-edge solutions for energy transition.


With over 30 years of experience and more than 450 projects carried out in 30 countries around the world, STE Energy is today an internationally recognized player, able to manage complex projects through its multidisciplinary engineering knowledge and excellent project management skills.

"We are a dynamic company whose development strategy is based on technological and geographical diversification and on a strong commitment to innovation."

Stefano Maria Stella Managing Director


+30 years international presence 

+30 countries around the word

+450 projects carried out

+60 projects active in  O&M

"We play an important role in the energy transition, working for the development and management of an electricity system entirely powered by renewable sources, for a more sustainable, modern and future-oriented world for the sake of our children."

Stefano Maria Stella Managing Director

EPC Contractor for turnkey solutions

STE Energy is a reliable EPC Contractor for turnkey solutions, ranging from feasibility studies to erection and commissioning, for new installations and refurbishments. In particular, our electrical substations are the most advanced interface between the national transmission systems and Renewable Power Plants and/or Energy Storage Systems to improve grid resilience and stability.


• EPC Contractor • Electromechanical General Contractor • Operation & Maintenance services • Innovative automation, control and protection systems • Specialized services and tests on HV equipment • Remote monitoring and control platform e-guardian


KASHIMBILA EVACUATION PROJECT - NIGERIA Electromechanical General contractor for 6 HV digital interconnection substation | 132 kV.

CAMPOS DEL SOL - CHILE Full EPC contract for step-up and interconnection HV substation and HV overhead transmission line for the biggest solar plant in Chile | 220 kV.

CERRO DE HULA - HONDUAS EPC Contractor for an additional bay of the existing HV interconnection substation | 220kV.

CONZA - ITALY ComFull EPC contract for a step-up substation of a wind farm | 150kV.

Your reliable partner for renewable energy and electricity infrastructure

discover more