What should be in an MCS handover pack

The handover documents matter because they are the record a household relies on long after the installer's van has left: they tell the householder or any future engineer what was fitted, how to look after it, and what is guaranteed. They are also the paperwork that grants and incentive schemes may ask to see. What follows sets out what must be in the handover pack, what MCS does and does not check, and what happens if something is missing or wrong.

Required contents of the handover documentation

MCS certified installers must provide a handover pack once the installation is complete, and the required contents are the same across the technologies the scheme covers, from small wind turbines to battery storage². The MCS Customer Commitment, which the installer must include in the handover pack, lists the minimum contents as:

• 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
• all relevant guarantees and warranties²

MCS's own technology pages confirm the same set of documents for individual technologies, and add that the handover pack includes key information such as product details and the workmanship warranty⁷. For a battery storage installation, for example, the handover pack is received upon completion, and the MCS certificate follows within 10 working days of completion⁴.

Consumer Code rules sit alongside this. Members of the Renewable Energy Consumer Code must give handover documents which, where relevant, include the MCS certificate, a compliance certificate and an invoice for payments received³. NAPIT's consumer advice makes the same point in plainer terms: following any work done under the MCS, the householder is left with a handover pack with a number of specific contents⁸.

What MCS leaves out: spoken guidance and later support

The rules specify the documents, but not the conversation. MCS specifies handover documentation but not the quality of verbal explanation, household understanding, structured follow-up or ongoing support⁹. In practice this means two householders can receive identical packs yet leave the handover with very different understandings of how to run their new system, and neither outcome breaches the standard.

This is worth knowing when you weigh up what certification actually buys you. MCS is a certification scheme for microgeneration installation companies and products, aiming to ensure consistent standards and provide confidence to consumers⁵. Consistent standards reach as far as the paperwork on your table; how well someone explains the controls, or whether anyone checks back a month later, sits outside the scheme.

The gap is easiest to fill at the point of handover itself. Asking the installer to walk through the servicing schedule and the guarantees while everything is fresh, and noting anything unclear, costs nothing and turns the documents into something usable. If the verbal handover is rushed or absent, that is not something MCS will act on by itself, but it can form part of a wider complaint about commissioning and handover, which MCS does consider¹⁰.

Output estimates: figures from the design stage, unverified

Every MCS installation comes with a prediction of how the system will perform, and it is important to understand what that figure is. MCS requires installers to provide a design-stage prediction of system efficiency, not a verification of actual performance⁹. The estimate in your pack is a modelled figure produced before the system was built, not a measured result from your home.

The Customer Commitment requires installers to provide realistic estimates showing how your system is likely to perform before you enter a contract, and to ensure those estimates are truthful, accurate and complete². So the prediction has force as a standard of honesty at the quoting stage: an installer must not inflate it to win the work. What it does not do is promise the number your system will actually deliver.

Two further points follow from the same rules. MCS does not require remediation of systems that are underperforming relative to their design⁹, so a system that falls short of its predicted output is not automatically a defect the installer must put right. And MCS does run its own checks on installations completed by certified installers, separate from Ofgem's audit programme under the Boiler Upgrade Scheme, and may contact you directly or arrange a visit¹¹. Those checks are about whether the installation meets the standards, not about whether it hits the predicted numbers.

Post-handover care: servicing, upkeep and warranty paperwork

The handover documents earn their keep in the years after installation, and three of their contents do most of the work. The recommended servicing and maintenance schedule sets out what attention the system needs and when². The manufacturer's instruction manuals carry the operating and maintenance requirements that a manufacturer's warranty is often conditional on. And the guarantees and warranties section records what is covered, by whom and for how long, including the workmanship warranty on the installation itself⁷.

The handover pack is the record a household keeps together and complete. A future servicing engineer will want the parts list to identify exactly what was fitted; a warranty claim may turn on the manuals and the paperwork showing the system has been maintained as recommended; and a buyer's surveyor will ask for the MCS certificate if the home is sold. The certificate itself is a record that the installation was done by a certified installer using certified products, and it is required for some grants and incentives⁶.

A thin handover pack is a warning sign about aftercare generally. An installer who cannot produce the manuals or the warranty terms at handover may be equally hard to reach when something needs fixing. The missing documents are also something a householder can point to in a complaint, since commissioning and handover is squarely within what MCS considers¹⁰.

Dealing with gaps or errors: the MCS complaints process

The process starts with your installer. MCS is the single point of contact for complaints about certified installers or installations, but only after an issue has been raised with your installer first¹². If the installer does not resolve it, you can complain to MCS, and it can also accept a complaint from a third party acting on your behalf if it has verified this with you¹³.

To help, MCS will need you to provide details of what went wrong, photographic evidence, supporting documents, and a willingness to engage and allow the installer access to remediate¹³. Details of the complaint are shared with the installer, the certification body and the Consumer Code if applicable¹⁰. You will be kept fully informed along the way, and once the complaint has been fully investigated and concluded you will be sent an outcome¹⁴.

The scope is broad. 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 breaches of the Customer Commitment¹². There is a deadline: for MCS certified installations, complaints must be made no more than two years after the date the system was commissioned⁵.

Verifying your installer and their certification

Two checks are free and take minutes. The Find an Installer search on the MCS website confirms whether a company is certified, and the MCS Helpdesk on 0333 103 8130 does the same by phone¹⁵. Checking before you sign is easier than arguing afterwards, and it is the same tool you would use to verify a company partway through a job.

The certificate is the other half of the paperwork. It should arrive within 10 working days of completion¹⁶, and it records that the installation was done by a certified installer using certified products⁶. If it does not arrive, chase the installer first, then treat the missing certificate as part of a complaint to MCS.

Be alert to anyone claiming to be MCS on the phone. MCS will never cold call you, and you will not be asked to purchase items like warranties from it¹⁷. Genuine routine verification contact from MCS, on behalf of Ofgem, comes by email or from 0333 103 8198¹¹. MCS also provides alternative formats for its information and certification documentation to support effective communications, giving large font as an example, so documents can be requested in a format that works for you¹⁸.