Green Business Directory

The Green Business Directory is a list of Carbon Trust Accredited Suppliers and installers of energy efficiency and renewable energy technology.

Solar panel installation

Carbon Trust Accredited Suppliers have been independently assessed by the Carbon Trust and met or exceeded criteria designed to examine their capability and proven track record of delivering thoughtful, well-designed energy efficient and renewable energy systems.

As part of the robust assessment process to feature in the Green Business Directory, the Carbon Trust takes into consideration case studies and feedback from client references regarding suppliers’ performance.  

Find suppliers for your project:

Looking for a supplier or installer for your project, but not sure who to approach? Get in touch and we can put you in contact with our Accredited Suppliers.

Supplier Directory

Customer feedback

We welcome customer feedback relating to any of our Accredited Suppliers, and encourage you to contact us via GBD@carbontrust.com. The Carbon Trust is committed to dealing with complaints in a fair and impartial manner, as detailed in our Complaints Policy (pdf).


Please note:  Carbon Trust Accredited Suppliers have met or exceeded criteria set by the Carbon Trust designed to examine their capability to deliver thoughtful, well-designed energy efficient and renewable energy systems. As part of the assessment process, the Carbon Trust takes into consideration feedback from client references regarding the suppliers’ performance. Whilst the Carbon Trust has endeavoured to confirm that all suppliers included in the Green Business Directory are of a proven high quality, users of the Green Business Directory enter into contracts directly with Accredited Suppliers to the exclusion of the Carbon Trust, and at their own risk. The Carbon Trust makes no representations regarding, nor does it accept any liability whatsoever in respect of, the performance of any services or the supply of any goods by Accredited Suppliers. Case studies have been written and supplied by Accredited Suppliers. Details should be independently reviewed by prospective customers

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