MCS Submissions: Registering an Installation Step by Step
Every MCS installation has to be registered before the certificate — and the customer's grant or tariff — exists. Here's what the submission asks for, where each answer comes from on the job, and how to stop registrations eating your evenings.
An MCS install isn't finished at commissioning. It's finished when the installation is registered with the scheme and the MCS certificate, with its unique number, lands in the customer's inbox. That certificate is what the Boiler Upgrade Scheme redemption, the Smart Export Guarantee application and the warranty chain all hang off — so a submission that stalls is a customer whose money stalls.
The registration itself is a form. What makes it slow is that the answers live in six different places: the survey notes, the design calculations, the product boxes you flattened for the recycling, the commissioning readings, and the certificates you issued at handover. This guide walks through the submission step by step and shows how to set the job up so registration is a copy-across, not a reconstruction.
Key takeaways
- Every MCS installation must be registered with the scheme — the registration is what generates the MCS certificate and its unique number.
- You register through your MCS certification body's route onto the MCS installation database; the scheme has been modernising, so follow your body's current process.
- The submission asks for the customer and installation details, the certified products installed (make, model and serials), capacity, commissioning date and the performance estimate.
- Every answer already exists somewhere on the job — the fix is capturing it against the job record as you go, not hunting for it afterwards.
- Register promptly after commissioning: the Boiler Upgrade Scheme redemption and SEG application both wait on the certificate number.
What an MCS submission actually is
Registering an installation means logging it on the MCS installation database through the route your certification body provides. The registration records what was installed, where, by whom and to what performance estimate — and in return the scheme generates the MCS certificate with a unique certificate number for that installation.
That number is the key that everything else turns on. Ofgem checks it when a Boiler Upgrade Scheme voucher is redeemed, energy suppliers check it for Smart Export Guarantee applications, and a future conveyancer or surveyor can look the installation up on the public MCS database. An unregistered install is, as far as the schemes are concerned, an install that never happened.
What the registration asks for
The exact form varies by technology, but the core data set is consistent: the customer's name and contact details; the installation address; the technology type; the products installed, selected from the MCS-certified product list, with model and serial numbers; the installed capacity; the commissioning date; and the performance estimate — the annual generation figure for solar PV, or the efficiency-based estimate behind a heat pump design.
For a heat pump, the performance estimate traces back to the room-by-room heat loss calculation and the design flow temperature, so the design work you did at survey stage is what the submission ultimately rests on. For solar PV, the estimate follows the MCS-prescribed method from the array orientation, pitch and shading assessment.
Products must be on the certified list
The registration only accepts MCS-certified products. Check the heat pump or panel model is listed when you quote, not when you register — discovering a listing problem after commissioning is a miserable way to spend a week.
Doing this on a job? Heat Pump Commissioning (Benchmark) — part of TradePlanr. Free to start, no card needed.
Where each answer comes from on the job
Map the form back to the job and the pattern is obvious. Customer and address details come from the quote. Product models come from the design and the order. Serial numbers come off the units on install day — a photo of each data plate takes seconds at the time and saves a site revisit later. Capacity and settings come from the design. The commissioning date and readings come from the Benchmark record or commissioning certificate. The performance estimate comes from the survey and design calculations.
In other words, the submission is a summary of a job you have already documented — if you documented it. Installers who capture serials, settings and readings against the job as they work register installs in minutes; installers who rely on memory and a camera roll spend their evenings cross-referencing WhatsApp photos against order confirmations.
When to submit
Register promptly after commissioning — your certification body sets the current window, and the sensible habit is to submit the same day or the day after while the job is fresh. Two deadlines downstream make speed matter: a Boiler Upgrade Scheme voucher can only be redeemed once the MCS certificate number exists, and vouchers have fixed validity periods; and an SEG application cannot start without the certificate either.
The clean sequence is: commission the system, complete the commissioning and handover certificates on site, register the installation, then send the customer their handover pack with the MCS certificate included. Done in that order, nobody is ever waiting on you.
Why submissions stall
The common failure points are mundane. A serial number that was never recorded, so someone has to go back to site. A product installed that differs from the one designed and quoted, which no longer matches the certified listing. A performance estimate that can't be traced back to a heat loss calculation when it's queried. A customer email address with a typo in it, so the certificate never arrives and you find out a month later when the grant stalls.
Every one of these is a data-capture problem, not a scheme problem. The submission is only ever as fast as the worst-recorded fact on the job.
One job record, every answer
TradePlanr keeps the quote, design notes, data-plate photos, commissioning readings and the Benchmark and F26B certificates against the job. When you sit down to register, every field on the submission is one job record away — not six apps away.
From guidance to action
Frequently asked questions
Who registers an installation with MCS?
The MCS-certified installation company registers it, through the route its certification body provides onto the MCS installation database. The customer cannot register it themselves — which is why a slow installer submission directly delays the customer's grant or tariff.
Does every MCS install need to be registered, even without a grant?
Yes. Registration is a scheme requirement for every MCS installation, not just grant-funded ones. It is also in your interest: the certificate is what proves the install was MCS-compliant if a warranty claim, audit or house sale raises questions years later.
Can software like TradePlanr submit to MCS for me?
No — the registration goes through your certification body's route into the MCS database. What job software does is make the submission trivial: the serials, readings, dates and certificates the form asks for are already captured against the job, so registering becomes a few minutes of copying across.
How quickly after commissioning should I register?
Your certification body sets the current requirement, but the practical answer is as soon as possible — same day or next day. The Boiler Upgrade Scheme redemption and any SEG application both wait on the certificate number, so every day unregistered is a day the customer's money is stuck behind you.
What if I entered something wrong on a submission?
Contact your certification body to correct it — don't leave a known error standing, because the certificate is relied on by Ofgem, energy suppliers and future owners. Catching errors is much easier when the submission was copied from a job record rather than typed from memory.
Related guides
MCS Certification Explained
What MCS is, why it gates the grants, and how to become and stay an MCS-certified installer.
The Boiler Upgrade Scheme for Installers: Vouchers, MCS and Getting Paid
The BUS workflow from the installer side — voucher application, install, MCS registration and redemption — and the paperwork that keeps the grant moving.
MCS Digital Evidence: The Photos and Documents Your Submission Needs
The pre-assessment and post-installation photos and documents now being asked for on heat pump jobs — a working checklist, shot by shot, and how to capture it without slowing the install.
MCS Audit Preparation: What Assessors Check
What an MCS surveillance audit actually samples — design evidence, commissioning records, handover packs and the QMS — and how to keep every job audit-ready by default.
Heat Pump Commissioning Checklist (Benchmark and MCS)
A working heat pump commissioning checklist — system prep, settings, balancing and the Benchmark and MCS F26B records that prove it.
The MCS Handover Pack: Complete Document Checklist
What goes in the MCS handover pack for solar PV and heat pump installs, who sends what, and how to hand it over cleanly.
