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Welcome to the MCS Installation Database

If you are an MCS certificated installer, please log in here.

Update to details of VAT receipts

Following on from the announcement regarding The MCS Service Company Limited, DECC and the MCS Administrator (Gemserv Limited) signing a Tripartite Agreement (see here), we are notifying installation companies about the change to details on the VAT receipts and your bank statements that you will receive when purchasing credits through PayPal, when using this MCS Installation Database. The details that will change are noted below:

Instead of Gemserv Limited, VAT Receipts will show the Seller’s details as below:

The MCS Service Company Ltd
8 Fenchurch Place

The MCS Service Company Ltd VAT Registration Number GB 189 2823 64.

Bank Statements will show the payment appearing as MCSSCo Ltd instead of Gemserv Limited.

Tips to Help with the Process of Registering Installations

For information regarding the MID and certificate processing times, please see the MCS website here.

Amending or Resending MCS Certificates
  • You can amend certificates without charge/use of an additional credit by clicking on the ‘Administration’ link in the top right hand corner of the screen.
  • Click on the certificate number for the installation you would like to resend or amend, the Submit Installation fields will appear with all of the installation details populated. We would recommend amending the email address of the recipient to your own company email address - this way you will know if the certificate has been generated correctly, plus have a copy for your records.
  • Once you have made the amendments required, click through the rest of the form, selecting the correct address or entering it manually if required, until you get to the last page of the form where the Total Installed Capacity and Estimated Annual Generation are detailed.
  • When you click the finish button, an updated certificate will be sent to the recipient email address with the same MCS Certificate number on it.

Please note, if the commissioning date of the installation is more than 10 working days in the past, you will not be able to amend the commissioning date or compliance certificate without requesting Extended Access. Please visit the website here for further information regarding this.


If you believe that you have added credits to your account but they do not appear, it is likely that your payment has been delayed for 24 hours by PayPal for review. You can contact PayPal to query this, on 08707 307 191. If you need the credits sooner, please try submitting a lower value transaction. All the credits will appear eventually, and you can always request a refund if you end up with more than you require.

Helpdesk Support

The MCS helpdesk is open Monday to Friday 9am - 5pm, with the exception of bank holidays in England and Wales.

Insufficient Credits
You do not have enough credits in order to submit an installation at this time.
Please purchase more credits and try again.