Battery storage — Surrey
Battery Storage Caterham
Home batteries for Caterham 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.
If you are weighing up battery storage in Caterham, start with the fact that the town is really two places: Caterham-on-the-Hill up on the North Downs, and Caterham Valley, the Victorian railway town around the station. The homes, and where a battery can sit in them, differ between the two. A battery stores electricity your panels make during the day, or that you buy at a cheaper rate overnight, and releases it in the evening. Most Caterham batteries will be fitted alongside panels, so what solar panels in Caterham would generate on your own slope is the natural first question.
Plug-in cars are a growing part of the local picture. DVLA records 3,239 privately kept plug-in vehicles across Tandridge at the end of June 2026, up from 2,495 a year earlier, and a car that charges at home changes how much storage makes sense. So does whether your CR3 roof faces the light on the Hill or sits lower in the Valley, where elevations drop to about 110 m along the railway. Our main battery storage guide covers the products and how sizing works; this page sticks to what is particular to Caterham.
Quick answer
Battery storage in Caterham:
- 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 Caterham makes about 491 kWh in June but about 135 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 Caterham 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 Caterham's homes
More than half of the homes in the Caterham Valley area are houses with walls of their own: Census 2021 counts 35.3% detached and 21.4% semi-detached across the Caterham Valley MSOA. In those houses the usual homes for a battery are an integral or attached garage, a utility room, or an inside wall close to the consumer unit, which keeps cable runs short. A loft is rarely our first choice: access for servicing is awkward and lofts run hot in summer and cold in winter, and the manufacturer's installation instructions set the temperature range and clearances any position has to meet. Tenure makes the decision simple for most: 34.5% of Valley households own outright and 37.9% with a mortgage, so roughly 72% can go from survey to installation without anyone else's consent.
The Valley also has a large share of flats, 30.5% purpose-built at the same census, many of them close to the station, while terraces are just 6.2%. In a flat the freeholder or managing agent decides what can be fixed to the building, and a leaseholder's lease may need checking before anything is installed; for some flats there is simply no suitable place, and we will say so. On the heritage side, Tandridge has 19 conservation areas and two sit on Caterham's doorstep: the former Caterham Barracks (designated 1996) and Chaldon's village centre (1973). There, a battery belongs indoors or on a rear wall out of public view, and anything you want to fix to a street-facing wall or a listed building is worth raising with Tandridge District Council first.
What a Caterham 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 Caterham itself, for a 4 kWp array at 35° facing due south with 14% system losses:
- 4,008 kWh a year in total
- 491 kWh in June and 493 kWh in July
- 135 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 Caterham
Caterham's town centre sits in UK Power Networks' South Eastern Power Networks area, so UKPN is the operator your installer deals with. Under the industry rule known as G98, a type-tested system rated up to and including 16 A per phase (3.68 kW) is notified to the operator before commissioning or within 28 days of it. Anything above that needs a G99 application approved before work starts; 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. Either way, the paperwork is the installer's job, not yours.
One thing to be plain about: a standard grid-tied battery switches off when the grid goes down, even with a full charge. That is deliberate, so the system cannot feed power into lines engineers may be working on. If keeping a few circuits running matters to you, perhaps because you work from home on the Hill or in Chaldon, backup has to be designed in from the start with the right inverter and a way to isolate your home from the grid. It adds cost, and we will tell you honestly whether it is worth it for your house.
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
Caterham and home batteries in numbers
Every figure below comes from a named public source.
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DESNZ records about 2,754 solar PV installations of all sizes across Tandridge district, with 12.25 MW of capacity, at the end of 2025 (as first published; not a count of homes or batteries).
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 3,239 privately kept plug-in vehicles across Tandridge at the end of June 2026, up from 2,495 a year earlier: a rise of about 30% (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 14.1% of homes in Tandridge have no mains gas connection (2024).
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 Caterham makes about 135 kWh in December against about 491 kWh in June: December is about 27.5% of June (our arithmetic), which is why a battery is sized to your evening use rather than to winter.
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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Caterham's town centre is in UK Power Networks' South Eastern Power Networks licence area; UKPN handles the G98 notification or G99 application for a battery.
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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Census 2021 for the Caterham Valley MSOA shows 35.3% detached and 21.4% semi-detached houses, 6.2% terraced and 30.5% purpose-built flats.
Source: censusdata.uk — Caterham Valley MSOA, TS044 accommodation type (Census 2021)
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Tandridge district has 19 conservation areas; two border Caterham: Caterham Barracks (designated 1996, 11 hectares) and Chaldon village centre (designated 1973, 7 hectares).
Source: Tandridge District Council — Conservation areas
Data last reviewed: October 2026
What a home battery costs in Caterham
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 Caterham homes
Most batteries are fitted alongside panels, so start with what solar panels in Caterham would generate on your roof; for the wider picture, see how we approach homes across Surrey, 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 Caterham? A worked example.
We also cover battery storage in Redhill, home batteries in Reigate and Croydon battery installation advice.
Caterham battery questions
Can I fit a battery in a Caterham Valley flat?
Sometimes. Purpose-built flats make up 30.5% of homes in the Caterham Valley MSOA (Census 2021), and in a flat the freeholder or managing agent controls what is fixed to the building, so their written consent comes first; if you rent, your landlord's does. The battery also needs a position inside your flat that meets the manufacturer's installation instructions and a sensible cable route to your consumer unit. Where there is no such space, we will tell you rather than force a design.
Will a battery keep my Caterham home running in a power cut?
Not by default. A standard grid-tied battery shuts down when the grid does, to protect engineers working on the network. Backup power is possible, but it has to be designed in from the start, with an inverter that supports it and a way to isolate your home from the grid, and it adds cost. If that matters for your house on the Hill or in the Valley, tell us at the survey and we will price it as a separate line.
Do I need to tell UK Power Networks about a battery in Caterham?
Your installer does it for you. Caterham's town centre is in UKPN's South Eastern Power Networks area. A system up to and including 16 A per phase (3.68 kW) is notified under G98 before commissioning or within 28 days of it; above that, a G99 application must be approved before work starts. UKPN says it automatically approves home solar and storage applications whose maximum export, after any export limitation, is under 5 kW.
Is a battery worth it with an EV in Tandridge?
It can be, but it depends on your tariff and when you are home. DVLA counts 3,239 privately kept plug-in vehicles across Tandridge (end of June 2026), up from 2,495 a year earlier. If your car charges overnight on an off-peak rate, a battery can also fill up at that rate and cover your evening use; if the car is out all day, a battery can hold daytime solar until it gets back. Sometimes a good off-peak tariff alone does most of the work, and we will say so if that is the case for you.