Home Battery Installation: Survey, Fitting and Handover

A home battery installation is not a single day of work but a short sequence: a survey to check your supply and agree where the battery goes, a fitting visit for the mounting and wiring, commissioning to test and configure the system, and a handover where you receive the certificates and settings. In one Energy Saving Trust case study, a combined solar panel and battery installation took around four days on site¹. The electrical work is regulated: in England and Wales it falls under Part P of the Building Regulations, and most of it must either be notified to building control or carried out by an electrician registered with a government-approved competent person scheme².

Anyone with a home can potentially install a battery system, and the survey is where an installer establishes whether one suits the household and which type of system fits the house³. Batteries are typically sited in garages, on external walls or in utility rooms, depending on the system chosen⁴. Before the fitting day there are notifications to sort out: the local Distribution Network Operator is notified, and the local council may also need to be informed⁵. This page walks through the whole sequence, who may do the wiring, and what is handed over at the end.

The installation, step by step

The process begins well before anyone drills a wall. The first stage is the survey, and its purpose is wider than picking a spot for the unit. Installers can help identify whether a home battery is suitable for your needs and the best type of system for your house³. Where the installer makes a pre-application to a network or scheme for domestic low-carbon technology, the information collected includes the installation details and a photo of the cut-out, the point where your home's electricity supply enters⁹. That photograph exists because the supply arrangement determines what can be connected safely.

The fitting itself then follows a recognisable order:

1. Survey and design. The installer checks the supply, agrees the battery location and sizes the system.
2. Notifications. The Distribution Network Operator is notified, and the council may need to be informed⁵.
3. Mounting and cabling. The battery is fixed in place, in a garage, on an external wall or in a utility room⁴, and the electrical connections are made.
4. Commissioning. The system is tested and configured. Battery systems connected to on-site generation should be commissioned to MCS MIS 3012, the battery installation standard¹⁰.
5. Handover. You receive the certificates, the warranty documents and an explanation of the settings.

The on-site work is usually measured in days rather than weeks. In the Energy Saving Trust case study mentioned above, the solar panel and battery installation took around four days, and the household then used power from their home battery during the daytime, topped up by the solar panels¹. A larger project can take longer: a park home insulation and heating installation took just over two weeks to complete¹¹. A battery fitted on its own, without new panels, is generally the shorter job of the three, since the panel mounting and roof work are what consume most of the time in a combined installation.

What affects how long it takes and what it costs

Two things above all shape how long the work takes and what it costs: whether the battery is going in alongside solar panels or on its own, and the capacity of the battery itself. The four-day case study was a combined solar and battery job¹; a battery-only fitting avoids the roof work entirely. The two-week park home project involved insulation and heating measures as well, which is why it ran longer¹¹.

On cost, the official MCS statistics for domestic retrofit battery installations give a sense of the market's shape. In the 2025-26 data, the smallest capacity band, 1 to 5.99 kWh, recorded 16,270 installations⁷. The capacity bands were chosen to cover distinct groupings: batteries approximately smaller than 6 kWh, approximately larger than 11 kWh, and a grouping in between⁷. Two cautions apply when reading any figures from that dataset. First, costs and capacities have been rounded to the nearest 10⁷. Second, the recorded cost does not include the cost of any additional device installed with the battery, such as solar panels, nor any extended warranty or other material or works on the battery equipment⁷. A quote for a battery-plus-panels installation is therefore a different animal from the battery-only figures.

The siting choice also feeds the timescale. A battery in a garage on an external wall is usually a simpler cable run than one in a utility room at the far end of the house⁴. For a fuller picture of what drives the price, see home battery cost, and for how the capacity decision is made, what size home battery you need.

Who is qualified to do the electrical work

The wiring side of a battery installation is regulated work. Part P of the Building Regulations applies in England and Wales, and it covers electrical installations that operate at voltages not exceeding 1000 V a.c. in or attached to a dwelling². The term dwelling includes houses, maisonettes and flats². All new electrical work in a dwelling must be designed and installed to account for Part P¹².

The rules distinguish between notifiable and non-notifiable work. Notifiable work includes new installations, house re-wires and the installation of new circuits, and it also includes additions to existing circuits in special locations, such as a room containing a bathtub or shower². Additions and alterations to existing installations outside special locations, along with maintenance, replacement and repair work, are considered non-notifiable². A home battery almost always involves at least one new circuit, which places it on the notifiable side.

Crucially, Part P applies to all electrical work in dwellings, whether carried out by professionals or DIYers². In general, notification to a building control body, or full plans deposition, is needed only if the work is major, involves one or more complete new circuits, and is not carried out by an electrical contractor registered with an authorised competent person self-certification or third-party scheme². A registered electrician is deemed competent to self-certify their work as compliant with the Building Regulations¹³. The stakes are real: failure to comply is a criminal offence, and local authorities have the power to require the removal or alteration of non-compliant work².

Picking and vetting an installer

The first check is the scheme membership. Which? advises that you check your installer is signed up to the Renewable Energy Consumer Code (RECC), which now covers storage, and certified by the Microgeneration Certification Scheme (MCS), or alternatively certified by Flexi-Orb⁵. Solar Energy UK makes the same point from the other direction: MCS installers can help identify whether a home battery is suitable for your needs and the best type of system for your house³.

For the electrical work itself, two certification bodies dominate. NICEIC has been the UK's largest certification body for electrical businesses for almost 70 years, with over 40,000 currently certified⁶. It assesses, certifies and trains electricians, plumbers, renewable energy installers, and gas and heating engineers, and it certifies businesses rather than individuals, unless they are sole traders⁶. NICEIC-registered electricians are assessed on an annual basis¹³. NAPIT is a certification body and training provider with over 20,000 members in the electrical industry¹⁵, and installers accredited by NAPIT can submit a building regulations application on your behalf¹⁶.

If you want an installer who is MCS-certified specifically for storage, NICEIC offers MCS certification for four key technologies: solar heating, solar photovoltaic systems, heat pumps, and electrical energy storage systems (EESS), and it is accredited by UKAS to offer the redeveloped scheme¹⁷. From 9 March 2026, all new applicants were automatically assessed under the redeveloped scheme¹⁷.

If something goes wrong, both bodies have complaints routes. NAPIT's policy is to review all complaints with impartiality, with any communication responded to within 10 working days¹⁸. The process applies when a NAPIT-certificated company has been contracted or subcontracted to carry out work covered by the scope of their certification, and a complaint may be made by any person who has had work completed by a member certified for the relevant scope of work at the time¹⁸. NAPIT can investigate complaints against registered businesses and tradespeople where a lack of technical competence is a concern¹⁹. Two limits matter: the responsibility for any required remediation lies with the member, and NAPIT will not compensate or reimburse monies in regard to non-compliant work¹⁹.

Telling the DNO, building control and the council

There are three separate notifications to think about, and they go to three different places.

• The Distribution Network Operator (DNO). Where a storage system is being installed, the local DNO is notified⁵. This is about the network knowing what is connected to it, and it is separate from planning and building control. The detail is covered in telling the network operator about a home battery.
• Building control. In England and Wales, notifiable electrical work must either be notified to local authority building control or self-certified by a registered competent person². An installer accredited by NAPIT can submit the building regulations application on the householder's behalf¹⁶.
• The council. The local council may also need to be informed⁵. The Planning Portal's guidance on sustainable home energy solutions makes the general point that understanding the planning and building regulations is crucial for safe, efficient installations and accessing incentives²⁰.

The installation standards sit alongside the notifications. Current scheme rules define domestic batteries as electrochemical batteries installed to be used in conjunction with solar PV panels in residential buildings, and require them to be installed in compliance with the latest version of the quality and installation standards, including the MCS battery installation standard, PAS 63100 and PAS 2035⁸. The Welsh approved document consultation states that on-site electricity storage and battery systems connected to on-site electricity generation should be commissioned to the MCS battery installation standard¹⁰. This standards framework is relatively recent: an official fire safety literature review from 2017 recorded that there were then no UK installation standards for these systems²¹. The full standards picture is set out in the standards governing home battery installation.

What to expect at handover

Handover is the stage that is easiest to shortchange, because by then the hard work is done and everyone wants the house back. It is also the stage that determines whether you can prove the installation was done properly, years later.

At a minimum, the handover should leave you with:

• Proof of Part P compliance. Either the installer's self-certification under a competent person scheme or the building control approval². This matters beyond the day itself: Electrical Safety First notes that electrical work complying with Part P will be reported in the Home Information Pack as part of local authority searches¹⁴.
• The commissioning record. Commissioning to MIS 3012 is the standard for battery systems connected to on-site generation¹⁰, and the commissioning sheet is your evidence it happened.
• The warranty documents. The MCS cost data explicitly excludes extended warranties from the recorded installation cost⁷, so any warranty you bought is a separate document to keep. The terms are covered in home battery warranties.
• The settings and access details. The monitoring app, the account and the charge and discharge settings as configured at commissioning. Monitoring is covered in monitoring a home battery.

One question belongs at handover even though it is really a design decision: whether the battery will work in a power cut. Not all systems are suitable for power cuts, so ask your installer whether your battery will work in an outage, and for how long⁵. If backup matters to you, the detail is in battery backup in a power cut.

How the rules vary across England, Scotland, Wales and Northern Ireland

The sharpest difference is in the building regulations framework. Part P of the Building Regulations applies in England and Wales¹³, covering electrical installations in or attached to dwellings at voltages not exceeding 1000 V a.c.². Richmond Council's guidance for householders, an English authority, states that all new electrical work in a dwelling must be designed and installed to account for the new Part P¹². Scotland and Northern Ireland have their own building standards systems, and the Part P competent person route described on this page does not apply there; the certification bodies themselves, NICEIC and NAPIT, operate UK-wide, so an installer's registration can still be checked in all four nations⁶.

Within England and Wales there are differences in the detail of what the approved documents expect. The Welsh consultation version of Approved Document L addresses on-site electricity storage and battery systems directly, stating that systems connected to on-site generation should be commissioned to MCS MIS 3012¹⁰. Wales is also moving faster on the wider policy: an amendment to Part L of the Building Regulations in Wales makes solar a functional requirement for new homes and non-domestic buildings where construction has not started, from 4 March 2027.

The notification to the Distribution Network Operator applies across Great Britain, since the distribution networks cover England, Scotland and Wales⁵. The MCS installation standards, MIS 3012, PAS 63100 and PAS 2035, are UK-wide scheme requirements rather than nation-specific law⁸. Planning permission for the battery itself is a separate question in each nation, covered in the pages on planning permission in England, Scotland, Wales and Northern Ireland.

The installation and your energy independence

The purpose of the whole exercise is captured by Energy Saving Trust: combining solar panels with a home battery lets you store free, renewable electricity to power your heat pump, which makes you less reliant on grid electricity²². In the four-day case study, the household used power from their home battery during the daytime, topped up by the solar panels¹. Batteries are, at their core, a way for homeowners to store excess electricity produced from their solar system³.

The independence gained is real but bounded, and the installation process itself shows where the boundaries sit. A fitted battery reduces day-to-day reliance on a supplier's daytime electricity, but the household remains connected to the network, must notify the Distribution Network Operator, and depends on that connection for import and export⁵. Backup capability is not automatic: not all systems work in a power cut, and the answer has to come from your installer before the fitting day⁵. And the system's long-term performance depends on the manufacturer's warranty terms and the monitoring platform, both of which are handed over at the end of the job rather than solved by it⁷.

What a properly installed battery does deliver is a home that runs more of its own day on its own stored power, with paperwork that proves the work was done to the standards that now exist, where none did in 2017²¹. The wider picture of what that adds up to is in home batteries and household energy independence, and the overview of the whole subject starts at home battery storage.