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About MCS

MCS is a mark of quality and demonstrates
compliance to industry standards that companies
strive to meet. It highlights to consumers that
companies are able to consistently install or
manufacture to the highest quality every time.

On 28th March 2018 a change to the MCS Installation Database (MID) will be implemented to bring MCS certificates in line with incoming changes to the Renewable Heat Incentive (RHI). This means that some additional questions will appear in the MID, when generating (and amending) MCS certificates. On 7th February 2018, the Department for Business, Energy and Industrial Strategy (BEIS) laid regulations to implement reforms to both the Domestic and Non-Domestic Renewable Heat Incentive (RHI) schemes before Parliament.

The date when the new regulations come into force is dependent on parliamentary processes and is not yet known. The changes to the MID are introduced prior to the regulations coming into effect to enable installers to register installations and generate MCS Certificates in line with the new requirements. Where the owner applies to the RHI scheme after the new requirements come into force, installations must meet the new requirements.

Please find below a summary of what this means for you and how to use the new functionality.

MCS will be updating the MID to reflect the eligible metering option on the MCS Certificate.

For heat pumps, all RHI applications for new Domestic installations and installations in domestic properties on Shared Ground Loops (Non-Domestic), will be required to have an electricity meter arrangement. Where payments are calculated on a deemed basis, the electricity meter is for information only about the electricity required for the heat pump to generate heat.

The changes on the MID will be available for MCS Contractors from 28th March 2018.

The MID has been updated so the MCS certificate will display which of the following meter types have been installed:

• Standalone electricity meter (compliant with MID Class A or better).
• On-board meters.
• A Metering and Monitoring Service Package (MMSP).

The MID has also been updated to include the following options, which the meter(s) will be required to record and display:

• electricity used by the plant to generate heat;
• electrical input into any supplementary electric heater controlled by the same control system as the heat pump; and
• electrical input into any immersion heater for a domestic hot water cylinder where the immersion heater is controlled by the same control system as the heat pump.

For full details, please see Ofgem’s Essential Guide to Metering.

In order to implement this change, the MID will be taken offline from 2pm on 28th March and will reopen at 4pm on 28th March. During this maintenance window, the MID will be inaccessible and you will be unable to login and/or generate certificates.

Please do not try to access the database during this time as you will be unable to generate MCS certificates.

We apologise in advance for any inconvenience this may cause.

The beginning of the MCS certificate generation process has not changed. Once you reach the final page, after the box confirming the annual water heating, you will see a question asking whether the installation is for Domestic RHI.

Additional questions have been added to the MID, as listed in the downloadable document.

Click here to download the MCS Electricity Metering MID Screenshot Guidance

This document demonstrates the MCS certificate generation process, however the steps can also be applied where necessary to change information required for certificate amendments.

MCS Certificates used for domestic properties on the RHI schemes on or after the date these amendments come into effect should use MCS Certificates issued on or after 28th March 2018 to avoid delays in the RHI application process.

Applications submitted to the Domestic RHI before these changes come into effect do not need to meet the metering for performance requirements and can use MCS Certificates issued before 28th March 2018.

MCS Contractors who have commissioned systems before these changes come into effect, and where the system owner applies to the RHI scheme after, will need to arrange the installation of electricity meters before the system owner can make an application to the RHI scheme.

Should you have any queries, please do not hesitate to contact the MCS helpdesk.