What is a technical feasibility study?

Installing solar panels isn’t a complicated process: especially if you have over 15 years’ experience (like us). However, there’s more to it than just sticking some solar panels to a roof. Especially when you consider large scale commercial solar PV and solar carports.

In order for our installations to be as safe and effective as possible, we complete thorough technical feasibility studies before we start installing. While this does lengthen the lead time for a project, we always factor in these tests before agreeing to any timescales. We think that being upfront about this process helps us to deliver on time and to budget.


What’s included in a technical feasibility study for solar?

Technical feasibility studies vary, depending on the scope of your installation. The explanations below describe some of the common tests conducted in a feasibility study. Not all solar installations will require every single test listed below: this is just an indicative guide.

Our projects vary because each of them is bespoke. The exact feasibility studies required will depend on the specifics of the site. More complex projects may require further tests. Your project manager will advise on the specifics of your installation.

When preparing a financial estimate for a customer, we outline the cost of the feasibility studies separately to financially protect customers. We do not ask customers to pay a deposit based on a proportion of the total cost. Sometimes, installation plans change following the results of the feasibility study, so this ensures the customer never ends up out of pocket.


G99: Permit to connect to the local distribution network

Almost all commercial solar PV arrays will require a G99 Permit. This provides permission for a solar installation to connect to the grid.

We manage the G99 permit application to the Distribution Network Operator (DNO) on behalf of the client. This includes preparing the application form and associated documentation, as well as liaising with the DNO.


Technical site surveys

The number and complexity of the on-site surveys required will depend on location, the complexity of the site and install.  For example, a solar carport will require more in-depth surveys than a roof-top installation. However, every install will require some form of on-site technical site survey.

Surveys may include:

  • Topographical survey: Highlights any difference between the true levels and gradients of the land at the project site, and those presupposed in preliminary designs. A good topographical survey ensures durable construction.
  • Utilities survey: Allows underground utility locations to be supplied as a CAD drawing referencing a digital topographical survey to be used in the detailed design where piling is required.
  • Pull-out tests: Assesses whether the existing substrate can accommodate the wind loading associated with the solar carport.
    Structural survey and reporting: Ensure the existing roof can accommodate the additional loading of the solar panels and ballast.


Planning permission is required for ground-mounted arrays, solar carports and if your planned install is located within the curtilage of a listed building.  RenEnergy has an in-house expertise to manage the planning process on behalf of our clients with 100% success rate on all our applications.


Detailed design

The findings of the technical site surveys, will inform the detailed design of your proposed installation, including:

  • System sizing in terms of generating capacity, physical size, location and orientation of major components.
  • Detailed specification of major components allowing an accurate capital cost for the systems to be calculated, including yield and ROI (Return on Investment) analysis.


Technical feasibility studies: part of the package

RenEnergy prides itself on the quality and performance of our installs.  A comprehensive technical feasibility study ensures that this is the case.

To ensure our projects are as smooth as possible, we work with an in-house team of technical consultants to arrange any technical feasibility studies as required. After conducting a thorough assessment of your business, our consultants will present you with the best option for your energy needs.

Get in touch to find out more about technical consultancy and commercial solar PV from RenEnergy.