Engineering, Procurement & Construction Best Practice Guidelines Version 3.0

18 February 2026

The third edition of the Engineering, Procurement & Construction (EPC) Best Practice Guidelines outlines best practices to improve the quality of large-scale hybrid solar PV and battery storage systems.

The latest revision of SolarPower Europe's Engineering, Procurement & Construction report showcases industry-aligned best practices, with expanded chapters on risk management and health and safety; and additional guidance for delivering successful and professional EPC services for hybrid solar PV and battery storage engineering, delivery, and commissioning.

 

All best practices mentioned in these reports are beneficial and relevant for utility-scale hybrid solar PV and battery storage projects. These guidelines are a key tool for operations & maintenance (O&M) service providers, technical advisors, project developers, owners, and financiers, investors, lenders, asset owners, asset managers, monitoring tool providers, policymakers, and all interested stakeholders in Europe and beyond.

 

In these guidelines, over 30 experts of SolarPower Europe’s Lifecycle Quality Workstream, have illustrated their knowledge and experience from across the solar sector, coming from O&M, EPC, engineering, recycling and circularity, waste management, utility-scale solar, and manufacturing backgrounds. 

Expanded guidance on hybrid solar PV and battery storage projects

  • The principal innovation of this edition is its comprehensive treatment of utility-scale solar projects integrated with battery energy storage systems (BESS), with substantially expanded guidance on hybrid PV+BESS engineering, delivery, and operational interfaces.
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Updated risk management chapter

  • Complements our ‘Technical Due Diligence Best Practice Guidelines for Hybrid Utility Solar PV and Battery Energy Storage Systems' report which provides a comprehensive framework to identify and quantify risks to hybrid solar PV and battery storage projects. 
  • In the EPC Guidelines, climate risks like hail are highlighted, with stronger design and procurement measures recommended.
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Revised health and safety chapter

  • Outlines innovations like robotic solar module installation systems, which can reduce heavy repetitive lifting for workers. 
  • On cybersecurity, the paper advises that solar projects need simple but strong digital protection, like secure logins and separated networks, to stop anyone from interfering with control systems.

     
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Engineering, Procurement & Construction Best Practice Guidelines Version 3.0

The third edition of the Engineering, Procurement & Construction (EPC) Best Practice Guidelines outlines best practices to improve the quality of large-scale hybrid solar PV and battery storage systems.

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