Welcome to Altenia
Innovation and experience for advanced energy solutions
A trusted partner for development and maintenance of energy infrastructure
From design to construction, from maintencance to regeneration, we respond promptly to market needs, contributing to the operational continuity and maximizing energy assets performances. This is made possible also thanks to the expertise of our subsidiaries, STE Energy and Half Bridge Automation.
Data Center
We manage every projects for the construction of electrical substations in end-to-end mode through a single customer interface, ensuring high performance, maximum safety and a quickly delivery thanks to the intra-group supply of strategic equipment.
IPP and Investment funds
Thanks to an integrated approach and a turnkey management, our clients can rely on us as single point of reference for the design, EPC and management of all assets on the Italian territory.
Utility
We ensure the business continuity of our customers' high-voltage energy infrastructures and we offer a high efficiency service thanks to a well-established know-how in the sector.
Industries
We support our customers by offering high standards of quality and customization, to meet specific project needs in a timely manner.
Our solutions
Comprehensive support for the end-to-end management of electrical infrastructures
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Engineering, Procurement & Construction
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Operation & Maintenance
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Revamping & Repowering
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Energy advisory services
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Services and digital solutions
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Power continuity
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Our projects
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Two 113 MW agrivoltaic plants completed in Sicily
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Construction of a Solar Park of 37 MW near Viterbo (Italy)
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Construction of an electrical substation near Viterbo (Italy)
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Our results
High voltage
> 150
systems and projects realized
> 600
O&M interventions per year
Photovoltaics
> 1 GWp
capacity installed in EPC mode
> 1.5 GWp
managed power
Storage
4
energy storage systems installed
Hydropower
> 1 GW
capacity installed
> 150
projects worldwide
Power continuity
> 100 MW
inverter regenerated in 2025
> 7,000
on-site working hours in 2025
Energy advisory services
> 250
energy audits
> 4
million tons CO2 reductions
Altenia News
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Altenia driving the Group’s growth in 2025
On 26 March 2026, the Board of Directors approved the 2025 results
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Altenia and Wesii: advanced technologies for the inspection and monitoring of renewable plants
Next-generation drones and in-house expertise to oversee the entire project lifecycle
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Altenia and Garmin: a collaboration for on-field protection
Innovation and safety at the heart of Altenia’s activities
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Preliminary agreement signed for the acquisition of Energy Systems Services (ESS)
Announced during the KEY trade fair in Rimini
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Altenia at KEY 2026: innovation and resilience shaping the future of energy
Together with Terna Energy Solutions, Altenia brings its vision to Rimini
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Destinazione Altenia: an onboarding journey that values people
Altenia joins the Terna Group’s onboarding program
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Altenia and PoliTechLab: training and innovation for the future of energy
Altenia’s contribution to the PoliTechLab Second-Level Master’s Program
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Altenia realized a 1 MW solar park for the Hyround project
The plant produces green hydrogen for the local network of Medea (Italgas Group)
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Altenia completed a revamping and repowering project
A project that transforms existing infrastructure into sustainable solutions for the future of energy