What should be in an MCS handover pack

The handover pack is the household's record of what was fitted, how to run and service it, and what is guaranteed. It is not a performance guarantee. MCS requires installers to provide a design-stage prediction of system efficiency, not to verify actual performance, and it does not require remediation of systems that underperform relative to their design³. That distinction matters for anyone reading predicted savings against a first winter's bills.

MCS itself is an independent certification scheme for microgeneration installation companies and products, covering small-scale renewable electricity technologies such as solar photovoltaic panels, biomass, wind, heat pumps and heat products⁴. Its role includes setting and maintaining technical standards, certifying installers and products against them, issuing MCS certificates for completed eligible installations, and assisting certification bodies to review cases and consumer issues⁵.

What the handover pack must contain

The minimum contents are set by the MCS Customer Commitment, which certified installers sign up to. The commitment requires an installer to provide a handover pack once the installation is complete, containing at least a list of the system's key parts, health and safety guidance, a recommended servicing and maintenance schedule, the manufacturer's instruction manual or manuals, and all relevant guarantees and warranties⁹. MCS repeats the same list for individual technologies, including small wind turbines¹⁰, micro CHP¹¹, battery storage¹² and biomass¹³.

The handover documents required under the Renewable Energy Consumer Code go further in one respect: where relevant they must also include the MCS certificate, the compliance certificate and the invoice for payments received². NAPIT's consumer advice states plainly that following any work done under the MCS, a household should be left with a handover pack with a number of specific contents¹⁴.

In practice the handover pack is the only durable record of the design decisions behind the installation. The key parts list identifies the make and model of the main components, which is what a service engineer or a warranty claim will ask for. The servicing schedule sets out what the manufacturer expects and when, and the guarantees and warranties section carries both the product warranties and the workmanship warranty. For solar heating, MCS notes that the handover pack includes a copy of the MCS Customer Commitment itself¹.

What MCS does not cover: verbal explanation and follow-up

MCS specifies handover documentation but not the quality of verbal explanation, household understanding, structured follow-up or ongoing support³. That is the clearest limit on what handover documents can do. A folder of correct documents does not guarantee that anyone explained how the controls work, when the first service is due, or what a fault code means.

There are two further scope limits worth knowing. MCS does not cover heat pumps installed with a thermal output larger than 45kW, nor the majority of installations in new-build properties¹⁵. Households in those categories sit outside the scheme's consumer protection route, whatever paperwork they hold.

MCS is also not accredited to offer dispute resolution, and states that it will not be able to help directly once a complaint reaches that point¹⁷. Its role is to investigate complaints about certified installers and installations and to work with certification bodies; where a dispute needs a formal decision, that sits with the certification body or the Consumer Code.

The practical consequence is that the handover documents are a starting point, not a substitute for asking questions at handover. The MCS Customer Commitment requires installers to provide realistic estimates showing how a system is likely to perform, before a contract is entered, that are truthful, accurate and complete⁹. Those estimates belong with the handover documents, and they are the figures to compare against later.

Performance predictions: design-stage figures, not verified results

The performance figures in a handover pack are design-stage predictions. MCS requires installers to provide a design-stage prediction of system efficiency, not verify actual performance, and it does not require remediation of systems that are underperforming relative to their design³. A predicted seasonal performance figure is therefore a modelling output based on the property, the emitter sizes and the expected demand, not a measurement.

What MCS does do is check installations. MCS undertakes its own checks on installations completed by MCS certified installers, separate from Ofgem's audit programme, and may contact owners directly or arrange a visit¹⁸. Under the Boiler Upgrade Scheme, Ofgem's guidance notes that MCS may contact a household for a short, routine verification on behalf of Ofgem either by email or by phone on 0333 103 8198⁸. These checks are about whether the installation meets the scheme's requirements, not about whether the system hits its predicted efficiency.

Product certification works differently again. The MCS product standards, developed by technical working groups, outline the performance test methods and the criteria that a certified product must meet¹⁹. That is a test of the product on a test rig, not of the installation in a particular house. MCS describes product certification as a mark of quality²⁰.

For a household, the honest reading is this: the handover documents record what was designed and fitted, and the certificate records that it was done by a certified installer using certified products. Neither states what a household's bills will be. Where a predicted figure and a first year of metered data diverge, the design-stage nature of the prediction is the explanation, and the complaint routes below are about workmanship and conduct rather than about the size of the gap.

After handover: servicing, maintenance and warranty records

The handover documents earn their keep after the installers have gone. The recommended servicing and maintenance schedule is the document that tells a household what the manufacturer expects and when, and the manufacturer's instruction manual carries the conditions attached to the product warranty. Both are minimum contents under the Customer Commitment⁹.

The guarantees and warranties section is where a claim starts. MCS states that a handover pack is provided upon completion including key information such as product details and workmanship warranty, and repeats that wording for solar heating¹, micro CHP¹¹, battery storage¹² and air source heat pumps²¹. The workmanship warranty is the installer's own undertaking; the product warranties come from the manufacturers. Keeping both, with the invoice, is what makes a later claim straightforward.

The MCS certificate is issued within 10 working days of completion⁶. It is a record that the installation was done by a certified installer using certified products, and it is required for some grants and incentives¹³. It is one document among the handover contents, not the whole set.

MCS publishes installation and contractor data freely on its Data Dashboard, which anyone can view and use²³. That is useful for checking an installer's record, though it does not replace the installation's own documents. MCS also uses industry data to track growth²⁰.

If something is missing or wrong: how MCS handles complaints

MCS is the single point of contact for complaints about MCS certified installers or installations, after an issue is raised with the installer first¹⁷. The first step is therefore always the installer. If that does not resolve it, MCS will consider complaints about system performance and design, quality of work, incomplete installation, delayed installation, commissioning and handover, installer conduct, damage to property, mis-selling, contractual issues, issues with the product, and breach of the Customer Commitment¹⁷. Commissioning and handover is explicitly listed as a complaint category²⁴.

To investigate, MCS needs details of what went wrong, photographic evidence, supporting documents, and a willingness to engage and allow installer access to remediate²⁵. Complaints from a third party acting on a household's behalf are accepted if verified with the complainant²⁵. Details of the complaint are shared with the installer, the certification body and the Consumer Code where applicable²⁴. MCS states that it keeps complainants fully informed along the way, and that an outcome is sent once the complaint has been fully investigated and concluded²⁶.

There is a time limit. For MCS certified installations, a complaint must be made no more than two years after the date that the system was commissioned⁷. That window applies to the MCS route; other routes, including the Consumer Code and the certification body, may have their own terms.

MCS also provides alternative formats for MCS information and certification documentation to support effective communications, giving large font as an example²⁸. Where a member of the MCS team believes a consumer is at immediate risk of harm, they will immediately alert their line manager to support them in the consumer engagement²⁸. The published complaints policy sets out the detail¹⁷.

Checking the installer and the certificate

Certification is free to check. MCS provides a Find an Installer online search and a Helpdesk on 0333 103 8130 for checking that an installer is certified²⁹. The same tool is used to find a certified installer near you⁶, and MCS notes that the Find an Installer tool will be usable for air-to-air heat pumps once they are ready under the Scheme²².

A requirement of companies wanting to gain MCS certification is that they are members of a CTSI Approved Consumer Code of Practice scheme in the first instance³⁰. That is why a complaint can be shared with a Consumer Code as well as a certification body²⁴. The codes themselves, such as the Renewable Energy Consumer Code, carry their own handover document requirements².

MCS describes itself as an independent certification scheme for microgeneration installation companies and products, aiming to ensure consistent standards and provide confidence to consumers⁷. Its stated roles include setting and maintaining technical standards for installations and products, certifying installers and products against those standards, issuing MCS certificates for completed eligible installations, and assisting certification bodies to review and address cases and consumer issues relating to installers or products⁵.

For a household, the handover documents and the certificate together are the evidence trail. The certificate records that the installation was done within the scheme; the handover documents record what was fitted and what is guaranteed. Neither removes the dependence on the installer's own workmanship warranty, on the manufacturers behind the products, or on the certification body and Consumer Code if something goes wrong. MCS is a certification and complaints route, not an insurer and not a dispute resolution service¹⁷.