What to Expect During a Commercial Solar PV Installation: Step-by-Step Guide

January 15, 2026

What to Expect During a Commercial Solar PV Installation: Step-by-Step Guide

Switching to commercial solar energy is a smart investment for businesses seeking lower energy costs, improved sustainability, and long-term energy security. And successfully realising these benefits requires a clear understanding of the commercial solar panel installation process. The process, from planning and design through to installation and long-term performance, can be complex, particularly for organisations without the necessary in-house energy expertise.

This is why Centreco provides expert support to businesses navigating these installation complexities. As the UK’s leading provider of commercial solar energy systems, Centreco delivers a seamless end-to-end experience tailored to each client’s operational needs. Following detailed solar energy system design and commercial modelling stages, where we match your energy demands with the most effective system design, we move on to the installation stages. The following steps outline a seamless operational process, with a commitment to ensure minimal disruption to your business.

Prior to the pre installation meeting, we work with you to make applications, manage the structural survey and grid connection (DNO)

Step 1: Pre-Installation Meeting – Building the Foundation

The pre-installation meeting, following agreement of the optimal system design, is a vital first contact meeting between Centreco’s operations team and your business. The session covers elements such as:

  • Site access points and storage arrangements
  • On-site working hours and business operation times
  • Health and safety protocols tailored to your location
  • Scaffolding and equipment placement
  • Electrical supply locations and any possible shutdowns
  • Business-specific needs and preferences

During the meeting, we collaborate with your team to create a detailed project plan that identifies and resolves potential installation challenges upfront. This proactive approach ensures your business experiences minimal disruptions during the solar PV installation process.

Step 2: Construction Phase Plan (CPP) & Scheduling

After the pre- installation meeting, a Construction Phase Plan (CPP) is created. This is a consultative document, and installation wont start until the document is signed off by both parties. An operations manager carefully reviews and finalises the plan, confirming all logistics and safety measures. Scheduling is coordinated with your team, including setting dates for the scaffolding setup and main installation works. This phase is crucial for aligning the installation process with your business operations and compliance requirements.

Step 3: Mechanical Installation

Once plans are agreed and access confirmed, the mechanical build starts:

  • Erection of scaffolding designed for safe and efficient roof access
  • Installation of mounting frames and trays
  • Laying and securing DC cables

Centreco installs only tier-one PV panels, maximising energy efficiency and providing reliability for your business. All our installations are backed up by all exclusive 2 year installation warranty. Mechanical installation progresses at approximately 75kW per week on a typical commercial rooftop, ensuring steady progress throughout your project.

Step 4: Electrical Works

Specialist electricians carry out the next stage, completing the AC connections that integrate the solar system with your existing electrical infrastructure. The speed of this phase varies according to inverter count, cable runs, and site complexity, but every step is managed by experienced Centreco professionals to meet the highest standards of safety and compliance.

Step 5: Testing, Commissioning & Monitoring

Following installation, comprehensive quality checks, detailed physical inspections, and thorough electrical tests are performed to ensure the solar PV system aligns with its design specifications for generation capacity and operational effectiveness. The system’s monitoring platform is activated and goes live, providing real-time performance tracking. You receive all relevant details and guidance on monitoring your new business asset.

Step 6: Handover and Documentation

With installation complete and performance verified, Centreco provides full documentation, warranty information, and training to ensure your staff are confident in using and maintaining the new solar PV system. Handover documentation is completed and signed off at network level, ensuring compliance with industry standards and regulatory requirements.

Partner with Centreco

Centreco offers more than just solar panels. We deliver tailored, end-to-end solutions backed by deep industry knowledge and proven expertise. Our bespoke in-house service, combined with transparent communication and a commitment to quality, has empowered UK businesses to reduce energy costs and build resilience against future energy challenges.

By choosing Centreco, you’re partnering with a team dedicated to maximising your solar investment through meticulous planning, expert installation, comprehensive aftercare, and ongoing support. We understand the complexities involved and strive to make the commercial solar panel installation process seamless for your business.

Take the Next Step

Discover how Centreco can transform your energy strategy and help achieve your sustainability goals. Contact us today to book your free Solar PV Appraisal.

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