Battery storage — Hampshire
Battery Storage Alton
Home batteries for Alton 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 Alton fits a town where about three households in four live in a house with its own roof: 29.7% in semis, 23.9% in detached houses and 21.4% in terraces at the 2021 Census. That usually means a garage, a utility room or a side wall where a battery can sit near the meter. The local grid has also had recent work: SSEN replaced 18 km of underground cable from the Alton substation between May 2023 and September 2024, to strengthen supplies as more homes add low-carbon technology such as solar panels and electric cars. See what solar panels in Alton would generate before you size storage.
Alton has a strong local energy community. Energy Alton has offered free, impartial home energy surveys since 2010, and the proposed Caker Stream solar farm between Alton, Farringdon and Selborne includes a 2 MW battery. Neither changes how a home battery is sized, which comes from your own evening use and tariff. Our main battery storage guide sets out the products and the sizing method.
Quick answer
Battery storage in Alton:
- 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 Alton makes about 490 kWh in June but about 138 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 Alton is on SSEN Distribution's Southern Electric Power Distribution 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.
How a home battery gets fitted in Alton
Four steps from first call to switch-on. No pressure at any stage, and a straight answer if it would not pay its way.
- Step 1
Your usage, not a guess
We look at when your Alton home uses power, especially evenings, and your tariff, because that, not the sunniest month, decides the battery size.
- Step 2
Sizing and siting
Where the unit can go (garage, utility room or an outside wall, as the manufacturer allows), whether it pairs with existing panels, and a written, itemised quote.
- Step 3
Installation and notification
Fitting and commissioning, with the battery notified to or approved by Southern Electric Power Distribution depending on its size. Backup in a power cut only if it is designed in.
- Step 4
Settings and handover
Charge and discharge set up around your tariff, the app explained, and the warranty documents in your hand.
Where a battery fits in Alton's homes
The 2021 Census counted 8,525 households in Alton: 29.7% semi-detached, 23.9% detached, 21.4% terraced and 21.3% in purpose-built flats. 36.6% own outright and 28.5% have a mortgage, while 14.8% rent privately and 18.5% rent socially (ONS Census 2021, TS044 and TS054). In the semis and detached houses of Holybourne, Wooteys and Whitedown, the garage or a utility room near the consumer unit is the usual place for a battery. The terraces near the centre often have no side access, which can mean an indoor spot near the meter, if the manufacturer's rules allow it. Lofts suit some units but not others.
The 21.3% in purpose-built flats, including the newer blocks at Goswell Square on the old brewery site, need the freeholder's or managing agent's consent. Renters, about a third of households between private and social renting, need their landlord's agreement. Alton has four conservation areas in and around the town: the historic centre (designated 1970, revised 1982), The Butts (1976), Anstey (1995) and Holybourne (1977). There, keep a battery inside a garage or the house where possible, and keep any wall-mounted unit off the street-facing elevation; listed buildings need the council's conservation team involved before anything is fixed.
What a Alton 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 Alton itself, for a 4 kWp array at 35° facing due south with 14% system losses:
- 4,044 kWh a year in total
- 490 kWh in June and 489 kWh in July
- 138 kWh in December and 160 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 Alton
The centre of Alton sits in SSEN Distribution's Southern Electric Power Distribution licence area. SSEN's £10.6 million Alton-to-Bordon project, which ran from May 2023 to September 2024, replaced 18 km of underground cable from the Alton substation and built a new substation at Bordon to strengthen supplies to more than 30,000 East Hampshire homes and businesses. The installer still has to tell SSEN about a battery: under G98, a type-tested system up to and including 16 A per phase (3.68 kW single-phase) is notified within 28 days of commissioning. Anything larger, including a 4 kW inverter at 17.39 A, needs a G99 application approved first.
A stronger network does not mean a battery keeps an Alton home running in a power cut. A standard grid-tied battery shuts down when the grid does. Backup has to be designed in, with extra isolation hardware and a short list of circuits to keep, at extra cost. Whether you are in Holybourne or Four Marks, we will set out what backup involves at survey and say plainly when it is not worth it.
Ofgem's reported 2024/25 figures for Southern Electric Power Distribution show about 41.8 supply interruptions per 100 customers and about 51.2 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
Alton and home batteries in numbers
Every figure below comes from a named public source.
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At the 2021 Census, Alton's 8,525 households were 29.7% semi-detached, 23.9% detached, 21.4% terraced and 21.3% in purpose-built flats, and 65.1% owned their home.
Source: Census 2021 via censusdata.uk — Alton (E04004490), TS044 accommodation type and TS054 tenure
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DESNZ records about 7,356 solar PV installations of all sizes across East Hampshire district, with 65.71 MW of capacity, at the end of 2025. The capacity includes larger ground-mounted sites, not only homes.
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 4,982 privately kept plug-in vehicles across East Hampshire district at the end of June 2026, up from 3,541 a year earlier: about 41% more (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 that about 17.18% of homes in East Hampshire district had no mains gas connection in 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 puts a 4 kWp south-facing array in Alton at about 138 kWh in December and about 490 kWh in June. December is roughly 28% of June (our arithmetic).
Source: European Commission JRC — PVGIS 5.3, PVGIS-SARAH3 2005–2023, 4 kWp, 35°, due south, 14% losses, building-mounted, run 15 October 2026
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SSEN's £10.6 million Alton-to-Bordon network investment (May 2023 to September 2024) replaced 18 km of underground cable from the Alton substation and built a new Bordon substation, to strengthen supplies to over 30,000 East Hampshire homes and businesses.
Source: Alton Town Council — Alton to Bordon Network Investment Project (alton.gov.uk)
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The centre of Alton sits in SSEN Distribution's Southern Electric Power Distribution licence area.
Source: NESO — GIS boundaries for GB DNO licence areas (May 2024); SSEN Distribution — Who we are
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The proposed Caker Stream Solar Farm between Alton, Farringdon and Selborne (application EHDC-25-0716-FUL) is a 44 MW scheme with a 2 MW battery and an offer of community ownership of up to 10%.
Source: Energise South Downs — Caker Stream Solar Farm (esd.energy) and cakerstreamsolar.co.uk
Data last reviewed: October 2026
What a home battery costs in Alton
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 Alton homes
Most batteries are fitted alongside panels, so start with what solar panels in Alton would generate on your roof; for the wider picture, see how we approach homes across Hampshire, or our main battery storage guide for the products and how sizing works. For a longer local read, see Is there a battery grant in Alton? What is open now.
We also cover battery storage in Farnham, home batteries in Basingstoke and Petersfield battery installation advice.
Alton battery questions
Can Alton's grid take a home battery?
For a typical home, yes, subject to the installer's notification or application. SSEN replaced 18 km of cable from the Alton substation between May 2023 and September 2024 to strengthen supplies for low-carbon technologies. A system up to 16 A per phase (3.68 kW single-phase) is notified under G98 within 28 days; anything larger needs a G99 application approved before work starts.
Will a battery keep my Alton home running in a power cut?
Not by default. A standard grid-tied battery shuts down with the grid. Backup needs extra isolation hardware and a choice of circuits to keep running, such as the fridge, lighting and boiler controls. We price that separately so you can decide whether it is worth it.
Is a battery worth it with an EV in East Hampshire?
Privately kept plug-in vehicles in East Hampshire rose from 3,541 to 4,982 in the year to June 2026, according to DVLA. Most are charged overnight on off-peak tariffs straight from the grid. A home battery adds value when it stores daytime solar or cheap overnight electricity for the evening peak. The survey compares that against your tariff before we recommend anything.
Can I get impartial advice in Alton before I talk to an installer?
Yes. Energy Alton, a volunteer-run community energy group, has offered free, impartial home energy surveys since 2010, including thermal-imaging checks. It is a sensible first call if you want an independent view of your home before speaking to any installer, including us.