How to Choose a Solar Installer UK: Find a Trustworthy Company

April 16, 2025 Solar installers

Because of its fast and guaranteed return on investment, and incredible impact on Net Zero and ESG goals, an increasing number of businesses think solar is the obvious choice. If you are reaching that conclusion and want to explore whether it is an option for you, you might be looking for an installer to survey your premises and advise on the potential of solar power for you. In that case, how do you know who to trust, and what should you look for in a solar installer?

Here is your quick guide to how to finds reputable installers, and what you should look for when you are choosing your solar power partner.

What should you look for in a commercial solar installer?

Here are plenty of solar installers out there, and some are more reputable than others. So how do you tell the experts from those without the skills and the background to make your project a success? Here are a few things you can look for:

A commitment to design. Not every roof is suitable for solar, and a good installer will want to perform a solar survey to either find a design solution or to decide whether solar is viable in the first place. They will not rush you into purchasing panels or committing to a project.

Consideration of context and goals. The design solution will be dictated largely by the physical characteristics of your building, but the broader approach to your solar power system should take into account your sector, your goals, and things like your ESG strategy.

Example projects. Of course, it is always useful to see a track record of an installer’s work, and the results they have achieved for other businesses.

How can you verify a solar installer’s credentials?

There are a number of qualifications and certifications that an installer could have. Once of the major memberships is the Microgeneration Certification Scheme (MCS), a quality assurance mark that became independent of government in 2018, and which covers installations up to and including 50kW.

Look for the MCS logo on the installer’s website or vehicle livery, ask about their membership, and if you which to verify it, you can cross check against the scheme’s own records on their Find an Installer page.

You can also look for membership of other industry-backed consumer codes such as the Renewable Energy Consumer Code (RECC), as well as membership of electrical trade bodies like NAPIT and NICEIC.

Questions to ask before hiring a commercial solar installer

A committed, serious, qualified solar installer will be delighted to discuss the details of the project and will ask you a lot of questions about site, such as electricity consumption, the roof, and most importantly, your goals for solar power.

You should also ask questions of them, like what will happen on day one of a typical project, what the typical planning process looks like, what discussions to have with the Distribution Network Operator (DNO), and whether you need to mention the installation to your insurer.

A legitimate and expert installer will be curious, will welcome questions, and will not pressure you into a purchase — this is not a process to rush.

If you want to find out how expert and trustworthy they are, then ask about:

Case studies from previous installations and references from other clients

The savings you can expect from the solar panels

What the payback period is likely to be

On questions of solar ROI and payback period, a good installer will be able to answer, but only after suitable research. On the questions of ROI and payback period, a good installer will be able to answer, but only after suitable research. They will not offer hard figures straight away. They may be able to suggest rough numbers having found out some information about your business and the building(s) in question, but will produce a more precise forecast once they have performed the necessary survey and provided a comprehensive proposal.

Need to find a solar installer near you?

Innasol’s growing network of trusted, expert partners, install only the highest quality panels on the market, backed by a best-in-class design-led approach that ensures all of our solar installations realise their full potential.

To find out the potential of your roof for solar, get a no-obligation quote, and understand how quickly your investment will pay for itself, all you need to do is: