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Installers & Manufacturers

In this area of the website you can
find information on the scheme benefits,
the certification process for installers
and manufacturers and Certification
Body details.

Important Information for Installers

Here you will find important information on the planning permissions, metering requirements, notification to DNOs, sub-contracting requirements, amending certificates and compliance certificates for heat generating technologies.

This information is useful for installers who are currently certified, as well as those wishing to become certified and operate in the market under the MCS mark.

Please visit the ErP page on the website. This can be found here.

As interest grows in the role that battery storage can play in improving the performance of solar PV systems by capturing any surplus electricity generated (allowing consumers to store solar electricity for use later in the day), the Renewable Energy Consumer Code (RECC) along with BRE’s National Solar Centre (NSC) have drawn up some guidance for installers and consumers.

In the absence of formal standards, you are able to find some useful information below about how battery storage can work alongside a solar PV system, whether retro-fitted to an existing installation or fitted as part of a new installation, along with RECC and NSC consumer guidance.

While it is normally the customer’s responsibility to obtain the planning permission, the MCS approved installers should make their customers aware of all permissions and approvals required for the installation. Where required, planning and/or building control approval should be obtained before work is commenced. The installers should also ensure that the building will meet the requirements of the building regulations and other applicable regulations applicable to their work during and following installation.

More information on planning requirements can be found here.

All metering which is intended to be used to record generation or export for FIT payment purposes must comply with specific metering legislation. The National Measurements Office (NMO) approve meters, on Ofgem’s behalf, for use where the maximum demand exceeds 100kW. List of NMO approved meters is available here.

A meter can also be regarded as approved if it has been approved by, or under similar regulations to the MI (AEEM) Regulations after 2007 in other European Member States.

The metering requirements under the FIT are detailed in the Ofgem document 'Feed-in Tariffs: Guidance for Renewable Installations'. The latest version of this document is available for download here.

MCS Metering Guidance document is available here and provides further guidance on the metering requirements.

It is required that all electricity generating installations that are connected to the grid are notified to the Distributed Network Operator (DNO). The DNO varies between the regions and details of the different Network Operators can be found here.

The notification may fall under either ER G83/2 or ER G59/2 requirements and further information can be found by visiting the Energy Networks Association website.

Please note that MCS are unable to notify grid connections for you. For technical guidance please contact the relevant Distributed Network Operator.

MCS 001 states that a contract for the sale and installation of a system be only between an MCS certified company and a customer. An MCS certified company may carry out work under subcontract to another MCS certified Company in which case clause 10 of MCS 001 must be satisfied.

If the MCS certified company obtains sales leads from any third party, the MCS certified company must require that the third party complies with all the relevant requirements of the MCS standards and the Consumer Code. The MCS certified company will be responsible for any non-compliance.

Please see MCS 001 and the relevant technical standards for further details in the MCS Standards section of this website.

The document listed below summarises the obligations of any entity bringing products into the UK from a country outside of the European Union so that all elements of the supply chain and the end consumer are clear on the responsibilities.

Please read this document for a full overview of the requirements

The MIS standards state that the MCS certificate shall be generated and handed over to the customer within 10 working days of the commissioning date. The MCS Installation Database (MID) has been updated to reflect this requirement and therefore will not allow the registration of an MCS certificate with a commissioning date more than 10 working days in the past.  For any installation companies that have missed this deadline, please read the process below.

Process for requesting access to the MCS Installation Database. 

Extended Access to MID template

If you miss the 24 hour window allocated to you, you will need to repeat the request process. Ensure you check your emails for notifications of when this time period starts to avoid this issue. All requests are notified to Certification Bodies, including repeat requests.

An MCS compliance certificate must be completed for MCS installations and a copy supplied to the system owner. These compliance certificates confirm that you have met the requirements of the MCS standard and records key information relating to the installation. A copy must be supplied to the customer and will be required if the customer wishes to apply for domestic RHI where the installation is eligible. Copies of the compliance certificate are available from the installer standards section of the MCS website.

Please note, the compliance certificates are only applicable for use with heat generating technologies. They are not currently part of the requirements for electricity generating technologies.