Battery storage — South West London
Battery Storage Tooting
Home batteries for Tooting homes, with or without solar panels — sized from your actual usage, with the costs, the seasons and the power-cut reality explained before you commit to anything.
Battery storage in Tooting is shaped by who controls the walls. Across the Tooting Bec, Tooting Broadway and Furzedown wards, 54.2% of households live in a flat, maisonette or apartment, and one in five live in a flat inside a converted or shared house, so the battery question is often shared with a freeholder or a neighbour. Most batteries go in alongside panels, so start with what solar panels in Tooting would make on your roof.
DESNZ's estimate for Wandsworth is that about 22.4% of homes have no mains gas connection, and DVLA counts 6,646 privately kept plug-in vehicles in the borough at the end of June 2026, up from 5,772 a year earlier. Neither number tells you whether a battery suits your SW17 home; your evening usage and tariff do. Our main battery storage guide explains the products and how sizing works.
Quick answer
Battery storage in Tooting:
- Cost: the Energy Saving Trust puts home battery storage at £1,500 to £10,000, with a 5 kWh system at around £4,600; your own figure comes from a survey of your usage.
- Seasons: PVGIS estimates a 4 kWp south-facing array in Tooting makes about 479 kWh in June but about 139 kWh in December — size the battery for your evenings, not for summer.
- VAT: residential battery installations carry 0% VAT until 31 March 2027, then 5% from 1 April 2027.
- Grid: central Tooting is on UK Power Networks's London Power Networks network; the installer notifies or applies to the operator depending on the system's size.
- Power cuts: a standard grid-tied battery shuts down when the grid does; backup needs to be designed in from the start, and we will tell you whether it is worth it.
- Who fits it: HCE is a NAPIT member (73495), MCS-certified for solar PV and battery storage via NAPIT, and a HIES Consumer Code member.
Figures: Energy Saving Trust (batteries, updated 19 August 2026) · HMRC VAT Notice 708/6 · PVGIS 5.3 (European Commission Joint Research Centre) · Ofgem RIIO-ED2 annual report 2024/25. Each is cited in full further down this page.
Where a battery fits in Tooting's homes
Tooting is more house-based than Wandsworth as a whole: Census 2021 puts 45.8% of households in the three wards in whole houses, 33.7% in terraces, against 31.4% in houses borough-wide. Tooting Bec is the most terraced ward, at 47.3%. A terrace with no side access means an indoor position, near the consumer unit, with the cable route planned at the survey. The few semis (9.8%) and detached houses (2.3%) may have a side wall or garage. A loft is seldom right, being awkward to service and prone to heat and cold, and the manufacturer's installation instructions decide. On Totterdown Fields, the 'fourth class' cottages are a separate ground-floor and first-floor flat under one roof, so the other owner's agreement matters too.
Converted and shared houses hold 20.4% of households across the wards and 27.8% in Tooting Broadway, where 46.3% rent privately; there, freeholder and landlord consent comes before any design. Only 43.8% of households across the wards own their home. In the Heaver Estate, Totterdown Fields and Mellison Road conservation areas, Wandsworth's appraisals point equipment to discreet places such as rear roof slopes and back gardens, so keep a battery indoors or on a rear wall, and ask the council's duty planner before fixing anything to a street-facing or listed wall.
What a Tooting roof generates through the year
A battery earns its keep by moving daytime generation into the evening, so the shape of the year matters more than the annual total. We ran the European Commission's PVGIS 5.3 (European Commission Joint Research Centre) for Tooting itself, for a 4 kWp array at 35° facing due south with 14% system losses:
- 3,984 kWh a year in total
- 479 kWh in June and 486 kWh in July
- 139 kWh in December and 158 kWh in January
In summer a modest array fills a battery most days; in midwinter it rarely will, and the battery's job shifts to storing cheaper off-peak electricity if your tariff offers it. That is why we size storage from your evening usage and tariff, not from the sunniest month. East- or west-facing roofs and shading change these figures more than the town does — which is what the survey measures.
Method: PVGIS 5.3 (European Commission Joint Research Centre), 4 kWp, 35° tilt, due south, 14% system losses, building-mounted, PVGIS-SARAH3, 2005–2023, monthly output, run 15 October 2026.
The grid and power cuts in Tooting
Tooting's town centre sits in UK Power Networks' London Power Networks area, so UKPN is the operator your installer notifies. Under G98, a type-tested system rated up to and including 16 A per phase (3.68 kW) is notified before commissioning or within 28 days of it; anything above that needs a G99 application approved before work starts, and a 4 kW inverter, at 17.39 A, is just over the line. UKPN says it automatically approves home solar and storage applications whose maximum export, after any export limitation, is under 5 kW. In a converted house with several supplies, the survey also checks which meter and consumer unit the battery will serve.
Plainly: a standard grid-tied battery shuts down when the grid goes down, even if it is full, so that it cannot feed power into lines engineers are working on. If you want some circuits in your SW17 home to stay on during a cut, backup has to be designed in from the start, with an inverter that supports it and a way to isolate the home from the grid; in a converted house it can only ever cover your own flat's circuits. It adds cost, and we will say whether it is worth it.
Ofgem's reported 2024/25 figures for London Power Networks show about 11.2 supply interruptions per 100 customers and about 10.5 minutes lost per customer over the year, against 39.7 and 35.1 across Great Britain. Source: Ofgem — RIIO-2 Electricity Distribution: annual report 2024 to 2025, supplementary datafile, sheet "Ch2 outputs - reliability" (CI and CML performance, planned and unplanned).
Local facts, sourced
Tooting and home batteries in numbers
Every figure below comes from a named public source.
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DESNZ records about 2,019 solar PV installations of all sizes across the London Borough of Wandsworth, with 9.82 MW of capacity, at the end of 2025 (as first published).
Source: DESNZ — Renewable electricity by local authority, 2014 to 2025 (Regional Renewable Statistics, published 29 September 2026), Solar PV sites and capacity, 2025
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DVLA records 6,646 privately kept plug-in vehicles across Wandsworth at the end of June 2026, up from 5,772 a year earlier: a rise of about 15% (our arithmetic).
Source: DfT and DVLA — VEH0142, licensed plug-in vehicles by keepership and local authority, 2026 Q2 and 2025 Q2 (published 23 September 2026)
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DESNZ estimates about 22.4% of homes in Wandsworth have no mains gas connection (2024); DESNZ does not say how those homes are heated.
Source: DESNZ — Subnational estimates of properties not connected to the gas network, 2015 to 2024, sheet 2024 (published 18 December 2025)
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PVGIS estimates a 4 kWp south-facing array in Tooting makes about 139 kWh in December against about 479 kWh in June: December is roughly 29% of June (our arithmetic).
Source: European Commission JRC — PVGIS 5.3 (PVGIS-SARAH3, 2005–2023), 4 kWp, 35°, due south, 14% losses, building-mounted, monthly output, run 15 October 2026
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Tooting's town centre is in UK Power Networks' London Power Networks licence area.
Source: UK Power Networks Open Data Portal — licence boundaries (December 2024); NESO — GIS boundaries for GB DNO licence areas (May 2024)
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Of 20,452 households in the Tooting Bec, Tooting Broadway and Furzedown wards, 45.8% live in a whole house (33.7% terraced) and 54.2% in a flat: 31.1% purpose-built, 20.4% in converted or shared houses (Census 2021).
Source: ONS Census 2021, TS044 Accommodation type — 2022 wards E05014023, E05014024 and E05014013, via the Nomis API
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Totterdown Fields' 'fourth class' cottages were built as a separate ground-floor and first-floor flat; the estate's appraisal names rear roof slopes, back gardens and shed roofs as discreet places for equipment such as solar panels.
Source: Wandsworth Council, Totterdown Fields Conservation Area Appraisal & Management Strategy
Data last reviewed: October 2026
What a home battery costs in Tooting
The honest national anchor is the Energy Saving Trust's: home battery storage ranges from £1,500 to £10,000, a 5 kWh system costs around £4,600, and a typical home system might be 10 kWh. Energy Saving Trust also says there is no exact formula — sizing comes from your own consumption, that a battery's typical lifespan is about 10 to 12 years, and that fitting storage at the same time as panels costs less than a separate visit later.
Residential battery installations carry 0% VAT until 31 March 2027, reverting to 5% from 1 April 2027. Export payments under the Smart Export Guarantee are set by each supplier and must be above zero — they change on short notice, which is why we never print one. Our own price comes from a survey of your usage, tariff and wiring, and arrives itemised — the battery, the inverter or hybrid unit, the network notification, commissioning and warranties as separate lines.
When we would tell you not to: if your evening usage is low, if your tariff gives you little difference between peak and off-peak, or if a smaller solar array would already cover what you use in daylight, a battery can take a long time to pay its way — and we will say so rather than sell you one.
Sources: Energy Saving Trust — Battery storage (updated 19 August 2026) · HMRC — VAT on energy-saving materials and heating equipment (VAT Notice 708/6) · Ofgem — Smart Export Guarantee.
More for Tooting homes
Most batteries are fitted alongside panels, so start with what solar panels in Tooting would generate on your roof; for the wider picture, see how we approach homes across South West London, or our main battery storage guide for the products and how sizing works. For a longer local read, see Is there help paying for a battery in Tooting?.
We also cover battery storage in Wimbledon, home batteries in Mitcham, Carshalton battery installation advice and battery storage in Croydon.
Tooting battery questions
Can I fit a battery in a Tooting converted flat?
Possibly, with consent. Flats in converted or shared houses hold 20.4% of households across the three Tooting wards and 27.8% in Tooting Broadway (Census 2021). The freeholder must agree to anything fixed to the building, and a tenant needs the landlord's agreement. The battery also needs a position inside your flat that meets the manufacturer's installation instructions and connects to your own consumer unit; if there is none, we will tell you.
I own a Totterdown Fields cottage flat. Who else needs to agree?
Probably your neighbour or the freeholder. The estate's 'fourth class' cottages were built as a separate ground-floor and first-floor flat under one roof, so the roof and outside walls belong to a building you share. A battery inside your own flat is the simplest route; anything fixed outside in the conservation area should be kept to the rear and checked with Wandsworth Council first.
Will a battery keep my Tooting home running in a power cut?
Not by default. A standard grid-tied battery switches off when UK Power Networks' supply fails, to protect engineers working on the lines. Backup needs an inverter that supports it and a way to isolate your home from the grid, designed in from the start, at extra cost.
Do I need to tell UK Power Networks about a battery?
Your installer does it. Tooting is in UKPN's London Power Networks area. Systems up to and including 16 A per phase (3.68 kW) are notified under G98 before commissioning or within 28 days; larger systems need a G99 application approved before work starts. UKPN says it automatically approves applications whose maximum export is under 5 kW after any export limitation.