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CUSTOMER CARE · SOLAR

Solar Complaints Procedure Clear, Fair And Straightforward

We aim to deliver a high standard of service throughout the design, sale, installation and ongoing support of your solar energy system. If something has gone wrong, please tell us so that we can investigate it properly and work with you towards an appropriate resolution.

Version 2.0 Updated 25 September 2026 Solar projects only
2 working days To acknowledge your complaint
10 working days For written findings or a clear action plan
5 working days To arrange an inspection where appropriate
Section 02

How To Make A Complaint

You may complain by email, telephone or post. We will accept a complaint made by you or by an authorised person acting on your behalf. We will not insist that a verbal complaint is rewritten before we begin dealing with it, although putting the issue in an email can help create a clear record.

Information That Will Help Us

  • Your full name, installation address and project reference, if known.
  • A clear description of what has happened and when you first noticed it.
  • Relevant photographs, monitoring screenshots, documents or correspondence.
  • Details of anyone you have already spoken to about the matter.
  • What you would like us to do to put things right.
  • Any communication, accessibility or support needs we should take into account.

You Can Still Complain Without Everything

We will begin dealing with your complaint even if some documents or information are not immediately available. If we need clarification or further evidence, we will explain what is required and why it may help our investigation.

For escalation under the RECC dispute-resolution process, your complaint should have been raised with us in writing. An email to solar@diamondgreen.energy counts as a written complaint.

Section 03

What Happens Next

As soon as received

Record And Allocate

We will record the complaint on our complaints register, preserve relevant information and appoint an appropriate person to take responsibility for the investigation.

Within 2 working days

Acknowledge Your Complaint

We will confirm that we have received the complaint, identify the person or team dealing with it and explain what will happen next. We may also confirm our understanding of the issues and your preferred contact method.

Where appropriate, within 5 working days

Arrange A Site Inspection

Where an inspection is appropriate, we will arrange it within five working days of being notified, subject to safe access to the property and your availability.

Within 10 working days

Provide Written Findings

We will report our findings clearly in writing. Where the matter cannot be fully resolved within this period, we will explain what has been established, what remains outstanding, the proposed action and when you can expect the next update.

Until completion

Resolve And Keep You Updated

We will work towards an agreed course of action and provide reasonable updates until the complaint and any agreed remedial work have been completed. Complex technical matters may take longer where testing, specialist attendance, replacement parts or manufacturer involvement are required.

Section 04

Investigation And Final Outcome

We will investigate competently, diligently and impartially. The information considered will depend on the nature of the complaint and may include quotations, contracts, survey notes, designs, performance estimates, photographs, call records, installation and commissioning records, test results, certificates, monitoring data, correspondence and relevant product or manufacturer information.

Responsibility For The Investigation

We may need information from an employee, subcontractor, supplier, manufacturer, lender, certification body or another organisation involved in the project. Where Diamond Green Energy is responsible for the customer relationship, we will remain your main point of contact rather than simply directing you elsewhere.

If another regulated firm appears solely or jointly responsible for a finance complaint, we may forward the relevant complaint or part of it promptly. We will tell you why it has been forwarded and provide the other firm’s details.

Our Written Final Response

  • Our understanding of the complaint.
  • The evidence and information considered.
  • Our findings and the reasons for them.
  • Whether the complaint is upheld, partially upheld or not upheld.
  • The impact of the issue, where relevant.
  • Any remedy or action we propose and the expected timescale.
  • The applicable escalation route if you remain dissatisfied.

Possible Remedies

Depending on the circumstances, an appropriate remedy may include an explanation, apology, correction of information, technical support, completion of outstanding work, a remedial visit, repair, replacement, refund or financial redress. Where financial redress is offered, we will explain how it has been calculated.

We consider our internal complaints process complete when we issue our final response. Any remedial work agreed within that response will remain open on our records and will continue to be monitored until completed.

Section 06

MCS Complaints

Where your complaint concerns an installation completed under Diamond Green Energy’s MCS certification, you should normally raise it with us first so that we have an opportunity to investigate and resolve it. We will acknowledge the complaint within two working days and respond effectively.

When MCS May Be Able To Help

  • You have received no response from us after 14 days.
  • You remain dissatisfied with our outcome or proposed resolution.
  • The complaint concerns system performance or design, quality of work, an incomplete or delayed installation, commissioning, handover or an MCS customer-commitment issue.
  • The installer and technology were MCS certified when the contract was entered into.

What Happens After Escalation

MCS will review the case and explain whether and how it can help. It may share complaint information with us, our certification body and our Consumer Code. If an agreed resolution cannot be reached, MCS will explain the applicable independent ADR route.

The MCS route applies only where the complaint falls within its scope. MCS will confirm the route relevant to the scheme requirements that applied to your installation.

Contact MCS

  • Email: mcscomplaints@mcscertified.com
  • Telephone: 0333 103 8130
  • Post: MCS, First Floor, Violet 3, Sci-Tech Daresbury, Keckwick Lane, Daresbury, Cheshire, WA4 4AB
Visit The MCS Website
Section 08

Accessibility, Information And Learning

Accessible Support

Tell us if you need a different format, a particular method of communication, additional time, a reasonable adjustment or help from an authorised representative. We will take reasonable steps to adapt our approach to your circumstances.

Sharing Relevant Information

To investigate or resolve a complaint, we may share relevant information with organisations involved in the solar project, applicable certification or consumer-protection schemes, a lender, the Financial Ombudsman Service, our insurers or professional advisers. Personal information will be handled in line with our privacy obligations.

Learning From Complaints

We record complaints, actions and outcomes so that we can identify recurring issues, training needs, process improvements and any wider action required. This policy will be reviewed at least annually and sooner where applicable rules or scheme requirements change.

Need To Raise A Solar Complaint?

Contact our solar team and tell us what has happened, how it has affected you and what you would like us to do. We will acknowledge your complaint within two working days.