Battery storage — South West London
Battery Storage Croydon
Home batteries for Croydon 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 Croydon has to work for London's most populous borough, and for a housing stock where flats make up 41% of dwellings. That changes the usual order of things. In the semis of Shirley and Selsdon or the avenues of Purley and Coulsdon, a battery is most often paired with solar panels in Croydon to carry daytime generation into the evening. In a flat in central Croydon or Thornton Heath, with no roof of your own, a battery can still charge on a cheaper overnight rate, if your tariff has one, and cover the expensive hours, provided the freeholder agrees to the work.
The borough's numbers are large in absolute terms. DESNZ records about 5,161 solar PV installations of all sizes across Croydon at the end of 2025, totalling 21.67 MW, and DVLA counts 9,010 privately kept plug-in vehicles in the borough, up from 7,049 a year before. For a household the question is narrower: how much electricity you use after dark and what you pay for it. Our main battery storage guide covers the kit and the sizing logic; this page covers Croydon's homes, the UK Power Networks connection and the questions we hear here most.
Quick answer
Battery storage in Croydon:
- 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 Croydon makes about 483 kWh in June but about 137 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 Croydon is on UK Power Networks's South Eastern 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 Croydon's homes
Croydon's 2023 Local Housing Needs Assessment, drawing on Census 2021, puts flats at 41% of dwellings (around 66,900), semi-detached houses at 24%, terraces at 23% and detached houses at 12%. Tenure is split too: 54.7% of households owned their home in 2021, 25.8% rented privately and 17.9% rented socially. For the owner of a semi in Shirley, Selsdon or Sanderstead, a garage wall or utility room near the consumer unit is the usual home for a battery, and the borough's detached houses give the most choice of all. Lofts are asked about a lot and work least well, because summer heat, access for servicing and fire-safety guidance on where storage may go all count against them.
A mid-terrace in South Norwood or Thornton Heath has no side access, so the battery goes inside, under the stairs or in a kitchen cupboard, with the cable route to the meter agreed at survey. For Croydon's 66,900 or so flats, the first step is consent: a leaseholder needs the freeholder's agreement for anything fixed to the structure, and the quarter of households who rent privately need the landlord's. Shared hallways and stairwells are not places for a battery. In the borough's 21 conservation areas, keep the unit indoors or on a rear wall out of public view, and on a listed building talk to Croydon's planning team before fixing anything to historic fabric.
What a Croydon 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 Croydon itself, for a 4 kWp array at 35° facing due south with 14% system losses:
- 3,977 kWh a year in total
- 483 kWh in June and 487 kWh in July
- 137 kWh in December and 150 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 Croydon
Central Croydon sits in UK Power Networks' South Eastern Power Networks licence area. The London Power Networks boundary is about 3 km from the town-centre point, so if you live further from the centre, UK Power Networks' postcode checker confirms which of its two networks serves you; both are UKPN and the paperwork is the same. A battery connects through an inverter and counts as generation: if the whole system's output is 16 A per phase (3.68 kW) or less, the installer notifies UKPN under G98, before commissioning or within 28 days of it, and above that a G99 application must be approved before work starts. UKPN says it approves automatically where the maximum export, after any export limit, is under 5 kW.
When the grid goes down, a standard grid-tied battery goes down with it, along with any panels, so no power reaches cables that engineers may be repairing. Backup has to be designed in: a backup-capable inverter, a changeover arrangement and the few circuits you want kept live. In a Croydon flat that extra hardware competes for cupboard space that is already tight, so we only recommend it where it earns its place. With 9,010 privately kept plug-in vehicles across the borough, we also get asked whether a battery will charge the car in a cut; on a standard system it will not.
Ofgem's reported 2024/25 figures for South Eastern Power Networks show about 42.2 supply interruptions per 100 customers and about 30.4 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
Croydon and home batteries in numbers
Every figure below comes from a named public source.
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DESNZ records about 5,161 solar PV installations of all sizes across Croydon at the end of 2025, with a combined capacity of 21.67 MW.
Source: DESNZ — Renewable electricity by local authority, 2014 to 2025 (Solar PV sites and capacity, end of 2025, as first published 29 September 2026)
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DVLA records 9,010 privately kept plug-in vehicles across Croydon at the end of June 2026, up from 7,049 a year earlier, a rise of about 28%.
Source: DfT and DVLA — VEH0142 licensed plug-in vehicles by local authority, private keepers, end of June 2026 and end of June 2025 (published 23 September 2026)
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DESNZ estimates that about 13.6% of homes in Croydon have no mains gas connection (2024).
Source: DESNZ — Subnational estimates of properties not connected to the gas network, 2015 to 2024 (published 18 December 2025)
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PVGIS estimates a 4 kWp south-facing array in Croydon makes about 137 kWh in December and about 483 kWh in June, so December is roughly 28% of June (our arithmetic on the PVGIS figures).
Source: European Commission JRC — PVGIS 5.3 (PVGIS-SARAH3, 2005–2023): 4 kWp, 35° tilt, due south, 14% losses, building-mounted, run 15 October 2026
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Central Croydon is in UK Power Networks' South Eastern Power Networks licence area, about 3 km from the London Power Networks boundary; both networks are run by UK Power Networks.
Source: UK Power Networks — licence boundaries (Open Data Portal, December 2024); NESO — GB DNO licence areas (May 2024)
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Flats make up 41% of Croydon's dwellings (about 66,900), with semi-detached houses at 24%, terraces at 23% and detached houses at 12%, so freeholder consent decides many battery installs.
Source: Croydon Local Housing Needs Assessment (Iceni Projects for LB Croydon, December 2023, para 3.27, Census 2021 data)
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54.7% of Croydon households owned their home at Census 2021 (58.8% in 2011), while private renting rose from 21.0% to 25.8%, and renters need a landlord’s agreement before a battery is fitted.
Source: ONS — How life has changed in Croydon: Census 2021
Data last reviewed: October 2026
What a home battery costs in Croydon
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 Croydon homes
Most batteries are fitted alongside panels, so start with what solar panels in Croydon 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 What Does a Home Battery Cost in Croydon? A Worked Example.
We also cover battery storage in Sutton, home batteries in Wimbledon, Caterham battery installation advice, battery storage in Mitcham and home batteries in Carshalton.
Croydon battery questions
Can I fit a battery in a Croydon flat?
Sometimes, and it is worth asking because flats are 41% of Croydon's homes. A leaseholder needs the freeholder's consent for anything fixed to the structure or any wiring beyond the flat, and private renters (25.8% of households in 2021) need the landlord's. The battery needs a dry, ventilated indoor spot near your consumer unit, such as a utility cupboard; never a shared hallway or stairwell. With no roof of your own it charges from the grid on a cheaper overnight rate, if your tariff offers one, and covers the evening. Whether that pays depends on your tariff's peak and off-peak gap, which we work out from your bills.
Will a battery keep my Croydon home running in a power cut?
Not on a standard system. A grid-tied battery shuts down when the grid does, panels included, so nothing feeds back into cables engineers may be working on. Keeping the fridge, lights or router running needs backup designed in: a backup-capable inverter and selected circuits wired to stay live, which takes extra space beside the consumer unit. If outage cover matters to you, tell us at the survey and we will design and price it separately, and tell you honestly if it is not worth it for your home.
Is a battery worth it with an EV in Croydon?
It can be, but not because the battery charges the car. DVLA records 9,010 privately kept plug-in vehicles across Croydon at the end of June 2026, up about 28% in a year. Most owners charge overnight on a cheaper rate; the battery covers the house's evening use, from daytime solar in summer or from that cheaper overnight electricity in winter, when PVGIS puts a 4 kWp south-facing Croydon array at about 137 kWh for the whole of December. We size the battery from your evening usage and your tariff, and check your consumer unit can carry both a charger and a battery.
Do I need to tell UK Power Networks about a battery in Croydon?
Yes, but your installer does it. Central Croydon is on UK Power Networks' South Eastern Power Networks, with the London Power Networks boundary about 3 km away; both are UKPN. A system with total output of 16 A per phase (3.68 kW) or less is notified under G98, before commissioning or within 28 days of it; anything larger needs G99 approval before work starts. UKPN says it approves automatically where the maximum export, after any export limit, is under 5 kW. The notification goes to the network operator, not your energy supplier.