MCS Certificate Guide: Solar, Batteries and Plug in Solar

An MCS certificate is the official record that a small-scale renewable system, such as solar PV or a home battery, was installed by an MCS certified installer working to the scheme's standards. You receive it from your installer once the job is finished, and many incentives, including most Smart Export Guarantee tariffs, ask to see it.

That matters whether you are weighing a rooftop array, a hardwired battery or plug in solar, because each route leaves you with different paperwork. This guide explains what MCS checks, how certificates are issued and why plug in solar sits outside the scheme.

What is an MCS certificate and what does it actually prove?

MCS, the Microgeneration Certification Scheme, describes itself as the UK's quality mark for small-scale renewable technology. Its scope takes in solar PV, solar heating, heat pumps, biomass and battery storage. It works on two fronts: writing and maintaining standards, and protecting consumers.

If you have ever typed “what is MCS certificate” into a search bar, the short answer is proof of process. MCS says the certificate records that a certified installer did the work, and some grants and incentives require it.

Without an MCS certificate solar panels still generate electricity perfectly well. What you lose is the evidence many schemes use to decide whether you qualify. For plug in solar, as we cover below, that evidence normally does not exist at all.

How do MCS accreditation and MCS standards fit together?

People often say MCS accreditation when they mean certification of a business. MCS actually certifies products, installers and installations, and guidance generally describes installers being assessed by UKAS-accredited certification bodies such as NICEIC and NAPIT.

The rules those assessors apply are the MCS standards: Product Standards for equipment and Installation Standards for design and fitting. MCS 001-01 and 001-02 cover what a contractor must do to stay certified.

Which MCS standards apply to solar PV?

According to the MCS Standards library, MIS 3002 is The Solar PV Installation Standard, with version 6.0 issued on 18 March 2026. A redeveloped MIS 3002:2025, version 2.0, was issued on the same date, so ask which edition your installer is working to.

Is there a separate standard for batteries?

Guidance generally points to MIS 3012 as the battery storage installation standard, so check the current edition in the MCS library before relying on it.

None of these documents governs plug in solar kits. Those are handled through the government's Interim Product Specification, which is a separate product-safety route.

How do you get an MCS certificate after installation?

The usual answer to “how to get a MCS certificate” is that you do not apply for it yourself. Your installer generates it once the work is finished, and guidance generally describes this happening through the MCS Installation Database.

1. Choose a business listed as certified for the technology you want, whether solar PV, battery storage or both
2. Agree the design and quote, and ask which MCS standard the work will follow
3. Let the installer complete, commission and register the system
4. Expect the certificate and handover pack afterwards; for batteries, MCS says this arrives within 10 working days of completion

What if your certificate goes missing?

Start with the installer who did the work, since they created the record. If that route stalls, the MCS Helpdesk on 0333 103 8130 is the official contact, and the MCS Customer Commitment sets out the rights you have as a customer.

Self-assembled plug in solar has no installer in this chain, which is the main reason it falls outside the process.

Why does an MCS certificate matter for SEG and incentives?

MCS states that certification is a requirement for many UK government incentives. The most visible example for homeowners is the Smart Export Guarantee, which Ofgem describes as a government-backed scheme launched on 1 January 2020 that obliges some suppliers to pay small-scale generators for low-carbon power they export.

The Energy Saving Trust notes that SEG usually requires MCS or equivalent certified technology and installer, plus a smart meter that records exports. Ofgem adds that licensees set their own rates and terms, but the rate must always be above zero.

• EDF's tariff page, checked in October 2026, lists a copy of the MCS certificate among the documents for its variable export tariffs
• EDF also asks for a smart or half-hourly meter and a photo of the export meter reading
• At the time of writing (October 2026), EDF's rates range from 2.0p/kWh to 18p/kWh depending on the tariff, and they change

This is where plug in solar diverges. The Energy Saving Trust explains that because most suppliers want an MCS certificate, plug in solar owners normally cannot sell electricity under SEG, although some suppliers may offer a tariff. For most plug in solar users, the value comes from using the power at home rather than exporting it.

Does plug in solar come with an MCS certificate?

Generally, no. Guidance generally describes plug in solar as self-installed, which means no certified installer completes the job and no MCS certificate is produced. That is a structural difference, not a verdict on the quality of the kit.

DESNZ confirmed that plug in solar became legal to buy and use across Great Britain from 27 August 2026, for kits of up to 800W. Its safety framework rests on the Interim Product Specification rather than MCS, and that specification covers plug in solar without batteries only.

• MCS solar: designed and fitted by a certified business, certificate issued, usually able to apply for SEG
• Plug in solar: bought as a product, set up by the owner, no MCS certificate, SEG normally unavailable
• Hardwired home battery: fitted by an electrician, with MCS certification possible where the installer holds it for storage

The table below sets a panel-only plug in solar kit beside three storage products, so you can see where installer paperwork starts to shape the decision.

Figures come from each brand's UK store and, for the panel-only kit, the Energy Saving Trust, all checked on 30 October 2026; prices move often, so re-check them before you buy.

A panel-only plug in solar setup suits daytime self-use; a larger battery brings installation, grid notification and certification into play.

How do you check the MCS register before hiring anyone?

MCS runs a Find an Installer tool, which most people simply call the MCS register. It lets you confirm whether a business currently holds certification, rather than trusting a logo on a van or a website.

2. Search the MCS register for your area and confirm the company name matches your quote
3. Check the listing covers the technology you are buying, such as solar PV or battery storage
4. Cross-check the same business on at least one other register, as Anker recommends

MCS certified solar installers and battery specialists are not always the same firms, so ask who will certify a combined panel and storage system.

What should you ask an MCS certified installer?

• Which installation standard and edition will this job follow?
• When will I receive my certificate and handover pack?
• Who handles the grid notification to the network operator?
• How is the workmanship warranty protected if your business stops trading?

MCS approved installers should answer these without hesitation. If a home battery is ever pitched to you as plug in solar, treat that as a warning sign, because batteries sit outside the plug in solar rules.

Where does MCS fit for an Anker SOLIX Solarbank installation?

The Anker SOLIX Solarbank 4 E5000 Pro home battery is a 5,024Wh LiFePO4 unit with four MPPT inputs and up to 5,000W of solar input, per the official Anker SOLIX datasheet. On the Anker SOLIX UK product page, Anker says it has completed G98 certification, and the page lists a Solar Panels MCS Certificate document for its panels rather than for the battery itself.

Installation is the key point. Under Part P, the unit currently has to be hardwired on a dedicated circuit by a Part P-registered electrician and paired with the Anker SOLIX Smart Meter Gen 2. It is designed at hardware level for plug-in connection, but that is not currently permitted, so it should never be treated as plug in solar.

To find the right person, Anker suggests searching the MCS, NAPIT or NICEIC tools, filtering for Battery Storage and cross-checking at least two. The electrician then submits the G98 notification to the DNO within 28 days of commissioning, after which Anker can unlock output above the 800W factory default, up to 2,500W.

You can review the full specification on the Solarbank 4 E5000 Pro UK product page before speaking to installers. This is not legal advice, so confirm eligibility and paperwork with your electrician, DNO and energy supplier, as rules and tariffs change.

Conclusion

An MCS certificate is less about the hardware and more about the evidence trail behind it. It shows that a certified business followed published MCS standards, and it is the document SEG suppliers and many incentive schemes look for first.

Plug in solar offers a simpler, self-installed route with no certificate and, normally, no SEG income. A hardwired battery or rooftop array asks more of you up front, but the right installer leaves you with paperwork that supports every later claim.

Planning a hardwired battery with a properly registered installer? Explore the Anker SOLIX Solarbank 4 E5000 Pro solar bundle and share the specification with your electrician.

Frequently Asked Questions

Does MCS certify home battery installations as well as solar panels?

Yes. MCS lists battery storage within its scope alongside solar PV and heat pumps. After a certified battery installation, MCS says you should receive a certificate within 10 working days of completion, together with a handover pack covering product details and a workmanship warranty. Some grants and incentives will ask to see it.

What does EDF ask for when you apply for its variable SEG tariffs?

According to EDF's tariff page, checked in October 2026, you need a copy of your MCS certificate, a recent electricity bill if EDF is not your supplier, your name, address and bank details, and a photo of your smart export meter reading. EDF then takes a first export read and quarterly reads after that.

Is MCS certification the same thing as being Part P registered?

No. MCS is a quality mark for renewable systems such as solar PV and batteries, while Part P registration means an electrician belongs to a government-approved competent person scheme for electrical work in homes. A battery job can need both, so check each credential separately rather than assuming one implies the other.

Does MCS assess the equipment or only the people fitting it?

Both. MCS says it certifies products, installers and installations, using Product Standards for equipment and Installation Standards for the fitting work. A compliant result therefore depends on approved kit and a certified business working to the right standard, so ask your installer to confirm both points before the job starts.

Who can help if my installer has not sent the certificate?

Contact the installer first and ask for a firm date, since the certificate is generated by the business that did the work. If you still get nowhere, MCS runs a helpdesk on 0333 103 8130, and its Customer Commitment explains what you are entitled to expect from a certified installer.

Can a plug in solar owner still get paid for exported electricity?

Usually not through SEG. The Energy Saving Trust explains that most suppliers require an MCS certificate, which self-installed plug in solar does not normally have. It adds that some suppliers may still offer a tariff, so it is worth asking, but most owners gain value by using the power at home.