Battery storage — Surrey
Fox ESS Battery Storage in Surrey
What Fox ESS means for a Surrey home, how it compares with the systems we fit, and a written answer on supply, installation and warranty if it is the one you want.
Fox ESS builds modular LiFePO4 home batteries and its own hybrid inverters, and this page looks at how that range fits Surrey’s houses, networks and roofs, using Fox ESS’s published figures and Surrey’s own public data. The full range is on our Fox ESS product page; the roof side is on solar panels in Surrey, and the battery storage guide explains how sizing works.
The battery system in HCE’s own job photos is EnSmart; if Fox ESS is what you want, ask us and we will confirm in writing how it would be supplied, who installs and commissions it, and what warranty attaches. For borough-level figures, see battery storage in Guildford, home batteries in Camberley and battery storage in Reigate.
Quick answer
Fox ESS in Surrey:
- Our own work: the battery systems in HCE's own job photos are EnSmart; if Fox ESS is what you want, ask us and we will confirm in writing how it would be supplied, who installs and commissions it, and what warranty attaches.
- Cost: the Energy Saving Trust puts home battery storage at £1,500 to £10,000, with a 5 kWh system at around £4,600; a quote for your home comes from a survey of your usage.
- VAT: residential battery installations carry 0% VAT until 31 March 2027, then 5% from 1 April 2027.
- Grid: every battery is notified to, or approved by, the local network operator depending on its size (G98 or G99); the installer handles it.
- Power cuts: a standard grid-tied battery shuts down when the grid does; backup has to be designed in and is never assumed.
- 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. Product facts are the manufacturer's, cited below.
How a home battery gets fitted in Surrey
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 Surrey 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 your network operator 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.
How Fox ESS fits Surrey homes
Surrey’s housing gives a modular battery room to work. At the 2021 Census 32.2% of the county’s households lived in detached houses and another 29.2% in semis, and in Surrey Heath, around Camberley, detached homes reach 43.7%. Those are the homes most likely to have a garage or utility room, which suits the shape of the range: Fox ESS’s datasheet puts the EP5 battery at 380 × 625 × 147 mm and about 50.5 kg, wall- or floor-mounted and IP65-rated for indoor or outdoor use, and the H1-G2 hybrid inverter at 434 × 418 × 185 mm and 22 kg, wall-mounted. Fox ESS’s UK battery warranty can be voided by less than 300 mm of clearance around the pack or by inadequate ventilation, so in a crowded Surrey garage the clearance is settled at survey, not on the day.
Surrey sits on two networks. The centres of Guildford, Epsom, Reigate, Dorking and Weybridge are in UK Power Networks’ South Eastern Power Networks area, while Farnham, Camberley, Godalming, Haslemere, Egham and Staines-upon-Thames are in SSEN’s Southern Electric Power Distribution area, and several towns sit within 2 km of the line, so the postcode decides. The rule is the same on both: under G98, equipment up to 16 A per phase (3.68 kW) is notified by the installer before commissioning or within 28 days after it, and anything larger needs a G99 application approved before work starts. Fox ESS makes the H1-G2 in five sizes from 3.0 to 6.0 kW and lists the 3.7 kW model at 3,680 VA for G98, so on a larger Surrey house the inverter size and the paperwork route are one decision.
Surrey: sunshine, the grid and local uptake
PVGIS puts a 4 kWp south-facing array across the Surrey towns on this site at about 130 to 140 kWh in December and about 479 to 501 kWh in June, from Guildford’s December figure at the low end to Cranleigh’s at the top. Godalming is the exception in December: its town-centre point sits in the Wey valley, where PVGIS’s terrain horizon cuts it to about 74 kWh; homes on higher ground or with an open southern view do better. That is roughly 4.2 to 4.5 kWh a day in December against 16.0 to 16.7 kWh a day in June (our arithmetic): less than one 5.18 kWh EP5 holds in midwinter, three times it in midsummer. It is the honest reason a modular battery is sized to the evening load, with room to add units, rather than to winter self-sufficiency.
Across the eleven Surrey councils on our town pages, DESNZ records about 32,212 solar PV installations of every size at the end of 2025, and DVLA records about 45,040 privately kept plug-in vehicles at the end of June 2026, up from 34,861 a year earlier (our sums of the council figures). Ofgem’s 2024/25 figures show about 42.2 supply interruptions per 100 customers and 30.4 minutes lost per customer on the South Eastern network, and about 41.8 interruptions and 51.2 minutes on Southern Electric Power Distribution, against 39.7 and 35.1 across Great Britain. A Fox ESS system keeps chosen circuits running in a cut only if its EPS output is designed and wired in at installation.
Local facts, sourced
Fox ESS and Surrey in numbers
Every figure below comes from a named public or manufacturer source.
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PVGIS puts a 4 kWp south-facing array at about 130 kWh in December in Guildford and about 140 kWh in Cranleigh and Dorking; June runs from about 479 kWh in Camberley to about 501 kWh in Cranleigh; Godalming’s town-centre point, in the Wey valley, is the exception at about 74 kWh in December.
Source: PVGIS 5.3, European Commission Joint Research Centre (PVGIS-SARAH3 2005–2023), 4 kWp, 35°, due south, 14% losses, building-mounted, run 15 October 2026; daily figures are our arithmetic
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DESNZ records 4,911 solar PV installations across Guildford borough and 4,475 across Reigate and Banstead at the end of 2025; across the eleven Surrey councils on these pages the total is about 32,212 (our sum).
Source: DESNZ, Renewable electricity by local authority 2014 to 2025, Solar PV sites (published 29 September 2026, end-of-2025 figures as first published); totals are our sums
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DVLA records 6,523 privately kept plug-in vehicles across Elmbridge at the end of June 2026, up from 5,249 a year earlier; across the eleven Surrey councils, about 45,040, up from 34,861 (our sums).
Source: DfT and DVLA, VEH0142 licensed plug-in vehicles by local authority, private keepers, 2026 Q2 against 2025 Q2 (published 23 September 2026); totals are our sums
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The town centres of Farnham, Camberley, Haslemere and Egham sit in SSEN’s Southern Electric Power Distribution area; those of Guildford, Epsom, Reigate and Dorking are in UK Power Networks’ South Eastern Power Networks area.
Source: UK Power Networks licence boundaries (December 2024) and NESO GB DNO licence areas (May 2024); NESO GB DNO licence areas (May 2024); SSEN Distribution, Who we are
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Ofgem’s 2024/25 figures: South Eastern Power Networks about 42.2 interruptions per 100 customers and 30.4 minutes lost per customer; Southern Electric Power Distribution about 41.8 and 51.2; Great Britain 39.7 and 35.1.
Source: Ofgem, RIIO-2 Electricity Distribution annual report 2024 to 2025, supplementary datafile, sheet Ch2 outputs - reliability (published 15 January 2026)
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43.7% of Surrey Heath’s 36,005 households live in detached houses, with 25.4% semi-detached and 12.4% terraced: around 81.5% of the borough’s homes are houses.
Source: ONS Census 2021, table TS044 (Surrey Heath)
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DESNZ estimates about 18.36% of homes in Woking borough and 17.82% in Runnymede have no mains gas connection, against about 9.25% in Surrey Heath (2024).
Source: DESNZ, Subnational estimates of properties not connected to the gas network, 2024 (published 18 December 2025)
Data last reviewed: October 2026
Battery storage across Surrey
Town by town, with each town's own sunshine figures and network operator: battery storage in Guildford, battery storage in Woking, battery storage in Farnham, battery storage in Camberley, battery storage in Weybridge, battery storage in Walton-on-Thames, battery storage in Epsom, battery storage in Godalming, battery storage in Cobham, battery storage in Esher, battery storage in Reigate, battery storage in Cranleigh, battery storage in Dorking, battery storage in Leatherhead, battery storage in Virginia Water, battery storage in Haslemere, battery storage in Egham, battery storage in Staines-upon-Thames, battery storage in Redhill, battery storage in Horley, battery storage in Caterham and battery storage in Ewell.
The full specification is on our Fox ESS page. For how sizing, warranties and pairing with panels work, see our main battery storage guide, and for the wider area, solar panels across Surrey. For a longer read, see Which battery suits a Surrey house? Five brands compared.
Comparing systems for a Surrey home? See EnSmart in Surrey, Tesla Powerwall in Surrey, Sigenergy in Surrey and EcoFlow PowerOcean in Surrey.
Fox ESS in Surrey: questions
Is my Surrey home on the SSEN or the UK Power Networks side, and does it matter for Fox ESS?
It depends on the postcode, not the town name. The centres of Farnham, Camberley, Godalming and Haslemere are on SSEN’s Southern Electric Power Distribution network; Guildford, Epsom, Reigate and Dorking town centres are on UK Power Networks’ South Eastern network, and towns near the line can be split, so check your address with the Energy Networks Association’s postcode tool. The Fox ESS inverter follows the same G98 and G99 rules on either network; what changes is who receives the form. SSEN says it aims to answer fast-track small-generation applications within 10 working days.
Can a Fox ESS battery go in a detached garage in Surrey?
Often, yes. The EP5 is IP65-rated for indoor or outdoor use and Fox ESS publishes a charging range of 0 to 55°C, so an unheated garage that drops below freezing in a Surrey winter is where the EP5-H heater variant, or the EP6 and EP12 with built-in warming, earns its place. The warranty asks for at least 300 mm of clearance and adequate ventilation, and the cable route back to the consumer unit has to work. All three are survey questions.
Would one Fox ESS EP5 be enough for a Surrey family home?
For some, as a start. In December a 4 kWp south-facing array in Guildford makes about 4.2 kWh a day on PVGIS figures, which one 5.18 kWh EP5 can absorb; in June the same roof makes about 16 kWh a day. The Energy Saving Trust says a typical home system might be 10 kWh and that there is no exact formula, so the answer comes from your evening use. Fox ESS lets four EP5s run in parallel, up to a quoted 20.8 kWh, which is why starting with one can make sense.