Introduction
The installation of photovoltaic systems on industrial roofs is one of the most effective solutions for reducing energy costs and contributing to the ecological transition. Across central and northern Italy, where the productive fabric is characterised by warehouses and facilities with large roof surfaces, this technology offers significant potential. From 1 September 2025, new guidelines regulate energy storage systems (Battery Energy Storage System — BESS) in greater detail, introducing technical and procedural requirements that designers and clients need to understand. Working with Stalia means having the entire authorisation and design process managed with expertise and precision.
Authorisation process
1. Preliminary assessment before proceeding with installation, it is essential to assess:
- Structural suitability of the roof, with verification of permissible loads
- Planning compliance and any building constraints
- Compatibility with existing systems and the electricity grid
2. Permits and notifications
- SCIA (Certified Notice of Commencement of Works) for new systems or significant expansions
- Building and planning authorisations in accordance with local regulations
- Notification to the grid operator for connection and net metering or energy sale arrangements
3. Technical design
The design must integrate:
- Structural analysis of the roof to verify suitability for the panel load
- Sizing of the photovoltaic system based on actual consumption data
- Integration of BESS systems to maximise self-consumption
4. Testing and commissioning
- Verification of the system prior to start-up
- Technical compliance certification
- Submission of GSE applications for access to incentives
BESS energy storage systems: updates from 1 September 2025
The new guidelines introduce specific technical requirements for storage systems installed in industrial settings:
- Thermal management systems and continuous battery monitoring
- Minimum clearances between storage units and operational areas
- Automatic isolation devices in the event of anomalies or faults
- Detailed technical documentation for each installed unit
These requirements demand more thorough design in the preliminary phase, but ensure greater reliability and service life of the system over time.
Economic and operational advantages
- Significant reduction in energy costs through self-consumption
- Partial independence from the grid and protection against energy price fluctuations
- Access to GSE incentives and net metering arrangements
- Increased industrial property value
- Contribution to corporate sustainability objectives
Challenges to consider
- Structural adaptation of the roof to support the weight of panels and BESS units
- Coordination between designer, installation contractor and grid operator
- Management of storage systems with attention to temperature, ventilation and remote monitoring
- Continuous updating on evolving technical guidelines and standards
Conclusion
The installation of photovoltaic systems on industrial roofs, integrated with BESS storage systems, is today one of the most strategic investments for industrial businesses across central and northern Italy. The new guidelines of 1 September 2025 establish a more precise technical framework that, when correctly applied, ensures safe, efficient and durable systems. Working with Stalia means managing the entire process — from preliminary assessment to commissioning — with an integrated approach and full compliance with current regulations.