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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Five 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
> 250
systems installed and operated
> 1,000
O&M interventions per year
Photovoltaics
> 1 GWp
capacity installed in EPC and revamping mode
> 1.3 GWp
managed power
Storage
4
energy storage systems installed
Hydropower
> 1 GW
capacity installed
> 150
projects worldwide
Power continuity
> 2,000
inverter regenerated during 2023-2024
> 600
on-site working hours in 2023-2024
Energy advisory services
> 250
energy audits
> 4
million tons CO2 reductions
Altenia News
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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
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Altenia realized a photovoltaic plant for Plenitude
Plenitude announces the start of production of the 2.75 MWp photovoltaic plant
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Altenia leads agrivoltaic development in Southern Italy
Agreement signed with Repower for a 67.2 MW project in Ciminna (PA)
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STE Energy joins Altenia
The acquisition strengthens expertise and presence in the energy sector
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Massimo La Gioia, CEO of Altenia, at Taranto Eco Forum 2025
Focus on renewables and sustainable development
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Two photovoltaic plants inaugurated in Montenero di Bisaccia (CB)
Built for REDEN, featuring advanced technical solutions and O&M management
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Altenia and Terna Energy Solutions at Intersolar Europe 2025
The leading trade fair for the solar industry
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New electrical substation completed in Tarquinia
150/30 kV user station built to connect renewable plants