The paperwork is not what slows MCS certification down. You need one fully compliant installation before your assessment, and MCS now runs business checks including your online presence. A stage-by-stage timeline for sole traders and small firms.
Most guides tell you MCS certification takes six to twelve weeks. That is roughly true for the administrative part and quietly ignores the thing that actually holds small installers up: you need at least one fully compliant installation, per technology, for your certification body to assess. You cannot be assessed on work you have not done, and plenty of homeowners want to see certification before they let you do it.
That circularity is the real project. This guide walks the stages in the order you will hit them, says what gates each one, and covers the two legitimate ways through the chicken and egg.
Written against the redeveloped installer scheme, which is live now and which certification bodies are rolling out to installers through 2026 and into 2027. If you are reading older guidance, some of the role names and requirements below will not match it.
Before anything else, someone in your business needs to be technically qualified for solar PV. Under the redeveloped scheme that person is the Technical Supervisor, and MCS is stricter about how they evidence it than the old scheme was.
Under the current scheme, the Nominated Technical Person could demonstrate competency three ways: an in-date qualification or personal certification, MCS-approved non-regulated training, or an MCS-approved independent assessment of competency.
Under the redeveloped scheme, a Technical Supervisor must hold one of two things:
The non-regulated training and independent assessment routes are gone. If you were planning to certify on the back of a short manufacturer or provider course that is not a regulated qualification, check it still counts before you pay for it.
What gates this stage: whether you already hold a Level 3 electrotechnical qualification and current BS 7671 award. Providers of the Level 3 solar PV qualification generally require both before they will take you. If you have them, the PV qualification is a short course. If you do not, this stage is measured in months, not weeks, and it is the single biggest variable in your timeline.
Realistic duration: days to a few weeks if you are already a qualified electrician. Six months or more if you are starting from outside the trade.
The redeveloped scheme defines three roles you must assign. For a sole trader, the same person can hold all three, which MCS states explicitly, so this is a paperwork exercise rather than a hiring problem.
Two details worth knowing. A Technical Supervisor can be subcontracted rather than employed, provided they are appropriately qualified, have a contract in place, and have been made aware of their responsibilities. And you will need more than one if your operation spans multiple technologies or widely separated areas of the UK. When you create a certificate on the MCS Installations Database you must enter your Technical Supervisor's full name, and you must be able to evidence to your certification body that they hold an approved qualification for the technology they are signing off.
Realistic duration: a day.
You must develop and document the processes and controls that ensure every installation meets scheme requirements, appropriate to the size and complexity of your MCS activities. Appendix A of the Installer Operating Requirements sets out which scenario your business falls under, based on factors including headcount.
Useful thing to know, because it saves small firms a lot of anxiety: MCS provides quality management system templates, including a documented procedure manual specifically for sole traders, and states plainly that these templates "are for guidance and don't strictly need to be used". You are not required to buy a QMS product or hire a consultant. You are required to be able to show how you control quality.
Realistic duration: one to three weeks of genuine effort if you start from the templates.
You apply to an independent certification body, not to MCS. For solar PV, five bodies cover it: Amtivo Group (British Assessment Bureau), Certsure LLP trading as NICEIC, NAPIT Certification, Simply Certification, and The IAA. Fees and turnaround vary, so get more than one quote. We cover this in what MCS certification actually costs.
Your Main Contact is assigned at this point.
Realistic duration: the application itself is quick. Your body's queue is the variable.
Your certification body passes your application to MCS, and you do not apply separately. You are assigned a dedicated MCS account manager, and the first step is a 15-minute onboarding call where you will be asked to demonstrate your understanding of the Customer Commitment and Installer Operating Requirements, and how they are embedded in your operations. Do not wing this call.
MCS then checks four areas:
That last one deserves attention, because it is new to a lot of installers and it is the one you can fix in advance. If your website claims "guaranteed savings", implies accreditations you do not hold, or advertises MCS certification before you have it, tidy it up before you apply.
There are also eligibility criteria for the business and its controlling persons: no unspent criminal convictions, including those involving violence, dishonesty, fraud, financial misconduct or consumer harm; no convictions that became spent within the last five years; and no current banning orders, court orders, regulatory restrictions or disqualification orders.
Realistic duration: a few weeks, driven by how quickly you return information.
Here is the gate that catches people. Your certification body assesses your compliance with a site-based installation assessment plus a review of your processes and controls. For each technology you want certified, you must complete at least one fully compliant installation to be used for that assessment.
So you need a real solar PV job, done to MCS standards, before you can be certified. And it cannot be retrospectively certified as an MCS installation afterwards, so the customer for that job needs to understand they are not getting an MCS certificate or Smart Export Guarantee eligibility from it.
Two legitimate ways through:
Work through an umbrella scheme. Umbrella schemes are run by MCS certified contractors who typically handle design and commissioning but subcontract some or all of the installation. Working as a subcontractor to one lets you build experience and demand insight, and MCS explicitly frames it as a route towards "potentially work towards achieving MCS certification for your own business". Good operators are expected to help subcontractors work towards their own certification. When choosing one, MCS suggests checking that the operator is MCS certified, that their technologies and locations match yours, their pricing and fees, and what training and technical support they offer. You can verify the first three on the Find an Installer tool.
Do the job for a customer who does not need the certificate. A property where the Smart Export Guarantee is not the point, or your own or a family member's roof, gets you an assessable installation without misleading anyone. Be straight with whoever it is about what they are and are not getting.
Realistic duration: entirely dependent on winning or arranging that installation. This is the stage that turns a "six to twelve week" certification into six months.
If the assessment finds compliance or quality issues, your body raises non-conformities and explains them. You respond with the root cause of each, the corrective action taken, and how you will prevent recurrence. They close when your body is satisfied.
Expect some on a first assessment. It is normal, not a failure.
Realistic duration: one to four weeks per round.
Once scheme checks pass and the assessment is complete, your certification body guides you through setting up your profile on the MCS Installations Database and notifying MCS. MCS then issues the Installer Agreement, a legally binding contract held directly between your business and MCS, signed by your Licensee.
Two practical notes. You only get MID access once the Installer Agreement is in place and co-signed, so there is a short dead period at the end. And the agreement is published on the MCS website in advance, so reading it before it is issued avoids delay at the final step.
If you are an existing MCS installer moving to the redeveloped scheme, your certification body updates your MID profile, and during that update you lose access to the old version of your MID account until the new agreement is in place. Plan certificate creation around it.
Realistic duration: days, assuming you have read the agreement.
| Stage | If you are already a qualified electrician | If you are starting from outside the trade |
|---|---|---|
| Competency | Days to weeks | 6 months or more |
| Roles and documented processes | 1 to 3 weeks | 1 to 3 weeks |
| CB application and MCS scheme checks | 3 to 6 weeks | 3 to 6 weeks |
| First compliant installation | Days, or months if you have no route to one | Months |
| Assessment and non-conformities | 2 to 6 weeks | 2 to 6 weeks |
| Installer Agreement | Days | Days |
For an already-qualified electrician with a job lined up, two to four months end to end is a fair expectation. The published "six to twelve weeks" is achievable only if the compliant installation is already arranged and nothing in scheme checks needs chasing.
For an installer who already holds the electrical qualifications and has a compliant installation available for assessment, two to four months is realistic. The commonly quoted six to twelve weeks covers the administrative process only and assumes nothing stalls. If you need the Level 3 solar PV qualification, or an electrical qualification beneath it, or you have no route to a first compliant installation, it takes considerably longer.
Yes. For each technology you want certified, you must complete at least one fully compliant installation for your certification body's site-based assessment. Installations cannot be certified retrospectively, so that first job does not give your customer an MCS certificate or Smart Export Guarantee eligibility. Working as a subcontractor through an umbrella scheme is the usual way round this.
Yes. MCS states that for smaller businesses and sole traders the same person can hold multiple roles, so one individual can be Licensee, Main Contact and Technical Supervisor. MCS also publishes a QMS documented procedure manual template specifically for sole traders, and some scheme checks are adjusted because sole traders are not listed on Companies House.
An umbrella scheme is operated by an MCS certified contractor who typically completes design and commissioning but subcontracts some or all of the installation work. Subcontracting to one lets you gain experience and gauge demand, and MCS frames it as a route towards achieving certification for your own business. Best-practice operators are expected to help subcontractors work towards their own MCS certification. It does not certify you by itself.
Yes. Online presence is one of the four areas covered by MCS scheme checks, alongside financial health, business details and previous certifications. MCS reviews how your business appears online, specifically looking for misleading claims and considering customer feedback. Remove any claim you cannot evidence, and do not advertise MCS certification before it is granted.
Yes. A Technical Supervisor can be directly employed or subcontracted, provided they are appropriately qualified, you have a contract in place for their services, and you have made them aware of their responsibilities as defined in the Installer Operating Requirements. You must be able to evidence to your certification body that they hold at least one approved qualification for the technology they are signing off.
Certified, or on your way there.
Solarable is a paid directory for MCS certified installers. Homeowners run a roof check, get a Solarable Report, and see the installers covering their postcode underneath it. They contact you directly. We verify your MCS certificate number against the public register before any listing goes live, and we are not a lead broker, so your details are never resold.
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