UK Battery Storage Regulations: What Applies to a Home Battery

UK battery storage regulations do not come from a single law: a home battery is governed by a stack of building, wiring, grid and fire-safety rules that apply together. In England and Wales, that means a fixed installation by a registered electrician, wiring to BS 7671, a grid notification under G98 or G99, and a location chosen with fire safety in mind.

This catches people out, because plug in solar became legal across Great Britain from 27 August 2026 and it is tempting to assume a battery can follow the same simple route. It cannot, at least not yet. This guide sets out the battery rulebook, explains where plug in solar ends and battery rules begin, and lists what to ask an installer.

What do UK battery storage regulations actually cover?

There is no single battery act. Instead, uk battery storage regulations are spread across laws and standards given legal force. The DESNZ consultation document explains that the Electricity Safety, Quality and Continuity Regulations 2002 (ESQCR) require installations to meet British Standard requirements, principally BS 7671.

• Part P of the Building Regulations: who does the work and how it is certified
• BS 7671: how the battery circuit is designed, installed, inspected and tested
• G98 or G99: how the local network operator is notified or asked for approval
• PAS 63100: where a battery may sit in or around a dwelling
• MCS, VAT and the Smart Export Guarantee: quality assurance, tax and export payments

Electrical Safety First notes that Scotland handles electrical work through building warrants under its Building Standards system, while Northern Ireland has no statutory equivalent of Part P. This guide focuses on England and Wales.

Why are batteries left out of the new plug in solar rules?

Before 2026, plug in solar could not lawfully be sold, supplied or used in Great Britain. DESNZ identified two blockers: ESQCR points to BS 7671, which was written for fixed installations, and the 1994 plugs and sockets safety regulations require BS 1363 plugs, which may not be used to connect generating equipment.

The fix amended those regulations, created an Interim Product Specification (IPS) and adjusted G98. DESNZ says plug in solar kits of up to 800W have been legal to buy and use since 27 August 2026. Crucially, the IPS covers plug in solar without batteries, and the Energy Saving Trust confirms that integrated storage sits outside current rules.

What does that mean for battery owners?

• A home battery is part of the fixed electrical installation, not a plug in solar appliance.
• The 800W plug in solar ceiling does not set the limit for a hardwired battery.
• Plug-ready hardware must still be hardwired until UK regulations and BSI product standards allow otherwise.
• Owning plug in solar creates no shortcut for adding storage later.

Which rules apply when you install a home battery?

Does Part P cover a battery installation?

In England, guidance generally describes a new circuit or a replacement consumer unit as notifiable work under Approved Document P, and a battery on a dedicated circuit falls into that territory. According to gov.uk, you either notify building control first or use an electrician registered with a competent person scheme.

Electrical Safety First says you should then receive an Electrical Installation Certificate (or Minor Works Certificate) plus a Building Regulations Compliance Certificate. Socket-connected plug in solar avoids this step, because it adds no new circuit.

What does BS 7671 say about batteries?

The IET states that BS 7671:2018+A4:2026 is now the current edition, with the Amendment 2 transition having ended on 15 October 2026. The IET shop's summary describes a new Chapter 57 on stationary secondary batteries and a cross-reference to PAS 63100; check the current edition for the exact wording.

Amendment 3 is also widely described as adding rules on choosing bidirectional or unidirectional protective devices. That matters wherever a battery inverter can feed power back through a circuit.

Is a home battery a G98 or a G99 connection?

A battery inverter that can export follows the same Engineering Recommendations as a solar inverter. G98 covers generation up to 16A per phase, about 3.68kW on a single phase, and is connect and notify: the installer tells the distribution network operator (DNO) within 28 days of commissioning, often via ENA Connect Direct. Larger systems need prior approval under G99.

An amended G98 now accommodates plug in solar, but only IPS-compliant microgenerators, not batteries. If you are adding storage to existing panels, ask your DNO how the combined system will be assessed.

How do MCS, VAT and the Smart Export Guarantee treat batteries?

MCS, the UK's quality mark for small-scale renewables, includes battery storage within its scope. Its guidance says you should receive an MCS certificate within 10 working days of completion, along with a handover pack. Industry sources generally cite MIS 3012 as the battery installation standard.

HMRC VAT Notice 708/6 zero-rates energy-saving installations in homes from 1 May 2023 to 31 March 2027, with 5% returning from 1 April 2027. Standalone batteries have been on the qualifying list since 1 February 2024.

• SEG: Ofgem requires certain suppliers to pay small-scale generators for exported low-carbon electricity.
• Certification: the Energy Saving Trust says suppliers usually expect MCS (or equivalent) technology and installer, plus a smart meter that records exports.
• Grid-charged export: suppliers need not pay for stored grid electricity you later export, and may ask how you separate it.
• Plug in solar: self-installed kits carry no MCS certificate, so plug in solar owners normally cannot claim SEG, per the Energy Saving Trust.

A battery does not earn SEG by itself. EDF's tariff page, checked in October 2026, asks applicants for its variable export tariffs to supply a copy of their MCS certificate.

How does the Solarbank 4 E5000 Pro fit within these rules?

The Anker SOLIX Solarbank 4 E5000 Pro shows how these rules play out in practice. On the Anker SOLIX UK product page at the time of writing, Anker says it has completed G98 certification and is officially listed. Its 2,500VA (10.9A) maximum AC output sits below the 16A-per-phase threshold, so Anker says G99 approval is not required.

It must currently be hardwired by a Part P-registered electrician on a dedicated circuit to the consumer unit, paired with the Anker SOLIX Smart Meter Gen 2. The hardware is designed to support plug-in connection, but that is not permitted today, so unlike plug in solar it cannot use a socket. Per the official Anker SOLIX datasheet, its safety design includes:

• An isolated inverter topology and Protective Class I construction
• An IP66 enclosure with an operating range of -20 to 55°C
• Protection against overvoltage, undervoltage, overcurrent, short circuit, overheating, overcharge and overdischarge
• Islanding detection, insulation impedance detection and surge protection

Output ships capped at 800W. It rises to 2,500W only after hardwired installation and grid notification, once the owner emails installation proof to Anker support and receives an unlock password for the app.

These figures come from each brand's UK store and the Energy Saving Trust on 30 October 2026; prices change, so re-check them before buying. Only the panel-only plug in solar kit is the product type the IPS was written for.

Where can a home battery be safely sited?

PAS 63100:2024 from BSI is generally described as listing places where battery storage should not go in a dwelling. Confirm the current text with your installer.

1. Avoid any room where people sleep.
2. Keep the unit out of escape routes.
3. Do not use lofts, roof spaces or voids.
4. Outdoors, keep it more than 1m from doors, windows and escape routes.
5. Allow at least 2m from stores of flammable materials.
6. Rule out basements without direct outside access.

The IP66 rating of the Solarbank 4 E5000 Pro home battery suits that kind of spot, and the product page describes it as suitable for outdoor installation when the instructions are followed. At 50kg, per the datasheet, it also needs a firm, level base. Plug in solar panels face different placement questions, mostly about permissions and mounting.

What should you ask your installer before going ahead?

Anker suggests using the MCS, NAPIT or NICEIC search tools, filtered for battery storage, and cross-checking at least two before choosing.

2. Which competent person scheme are you registered with?
3. Will I receive an Electrical Installation Certificate to the current BS 7671 and a Building Regulations Compliance Certificate?
4. Does my consumer unit need modifying or extra protective devices?
5. Will you submit the G98 notification to my DNO and give me a copy?
6. How does your chosen location reflect PAS 63100?
7. Are you MCS certified for batteries, and how will the system work alongside any plug in solar I own?

That plug in solar question matters because the Energy Saving Trust says the government is looking at allowing more than one plug in solar device per home in future. This article is general guidance, not legal advice; confirm the details with your electrician, DNO and energy supplier.

Conclusion

UK battery storage regulations come down to getting several rules right together: a notifiable circuit installed by a registered electrician, wiring and testing to the current BS 7671, a G98 or G99 connection and a fire-aware location. MCS certification, the VAT zero rate and your supplier's SEG terms then decide what the paperwork is worth to you.

Plug in solar has opened a simpler route for panel-only kits, but batteries stay on the fixed-installation side of the line for now. Government work on longer-term standards, including BS 7671 and BS 1363, is the space to watch for any change to how plug in solar and storage connect.

If you want a battery with a clear G98 route and an 800W-to-2,500W unlock after professional installation, explore the Solarbank 4 E5000 Pro on the Anker SOLIX UK store.

Frequently Asked Questions

Do I need planning permission for a home battery?

Building regulations approval and planning permission are separate regimes, and gov.uk notes you may need both for some projects. Approval under Part P does not settle planning questions, nor does it replace consent from a landlord or freeholder. Check with your local planning authority and your building owner before any installation work begins.

Can I install a home battery myself?

In England, a new dedicated circuit is generally treated as notifiable work, so an unregistered person would need to notify building control before starting. Product conditions matter as well. Anker, for example, requires a Part P-registered electrician for the Solarbank 4 E5000 Pro, so self-installation is not an option for that particular unit.

Can plug in solar panels be combined with a home battery?

Not as a single socket-connected product. The government's IPS covers plug in solar without batteries, and the Energy Saving Trust says integrated storage falls outside current rules. You can own a compliant plug in solar kit and a separately hardwired battery, but ask your electrician how the two will interact on your circuits.

What happens to VAT on home batteries after March 2027?

HMRC VAT Notice 708/6 sets a zero rate on qualifying energy-saving installations in homes until 31 March 2027. From 1 April 2027, the rate is due to revert to 5%. Standalone batteries have qualified since 1 February 2024, so the date your installation is completed can affect the final price you pay.

Do battery rules differ in Scotland and Northern Ireland?

Yes. Electrical Safety First explains that Scotland uses its Building Standards system, where electrical work is covered by a building warrant and an approved certifier or the local authority. Northern Ireland has no statutory equivalent of Part P, and its grid rules sit under separate regulations, so local advice matters.

What paperwork should I keep after a battery is installed?

Keep the Electrical Installation Certificate, the Building Regulations Compliance Certificate, a copy of the G98 or G99 submission, and any MCS certificate with its handover pack. Together they prove the work meets Part P, support any SEG application, and help a later electrician understand exactly how the system was installed and protected.