Battery storage — North London
Fox ESS Battery Storage in North London
What Fox ESS means for a North London 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.
North London runs from the semis of Havering and Harrow to the mansion blocks of Haringey, and Fox ESS’s modular range fits some of those homes far more easily than others. 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.
The range is on our Fox ESS product page, the roofs on solar panels in North London, and sizing in our battery storage guide. Borough figures are on battery storage in Harrow, home batteries in Enfield and Romford battery installation advice.
Quick answer
Fox ESS in North London:
- 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 North London
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 North London 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 North London homes
Havering is the semi-detached end of London: 41.2% of its 101,277 households live in semis, and in Harrow 37.1% do. A semi often has a side return or garage where a Fox ESS EP5, 380 × 625 × 147 mm and about 50.5 kg, can be wall- or floor-mounted with the 22 kg H1-G2 inverter beside it, both IP65 for indoor or outdoor use. At the other end, 98.2% of households in Wembley Park ward live in purpose-built flats, and UK Power Networks says the building owner’s permission is needed before solar or storage work starts on a multi-occupied building. For a flat, that consent is the first step.
Most north London town centres on this site, from Barnet and Harrow to Enfield, Tottenham and Romford, sit in UK Power Networks’ Eastern Power Networks area; Walthamstow’s is on London Power Networks, and Wembley, Tottenham, Chingford and Hendon are within about 1.4 km of a boundary. G98 covers equipment up to 16 A per phase (3.68 kW), notified within 28 days; above that, a G99 application is approved first. UK Power Networks says installations exporting under 5 kW after any export limitation are approved automatically, and Fox ESS lists the 3.7 kW H1-G2 at 3,680 VA for G98.
North London: sunshine, the grid and local uptake
PVGIS puts a 4 kWp south-facing array at about 138 to 143 kWh in December across the north London towns on this site, and about 474 to 489 kWh in June, Romford at the top of both. That is about 4.5 to 4.6 kWh a day in December and 15.8 to 16.3 kWh in June (our arithmetic).
DESNZ records about 20,359 solar PV installations across Barnet, Harrow, Brent, Haringey, Enfield, Waltham Forest and Havering at the end of 2025 (our sum), and DVLA about 48,090 privately kept plug-in vehicles at the end of June 2026, up from 38,569 a year earlier; Barnet alone has 12,097. Ofgem’s 2024/25 figures for Eastern Power Networks show about 44.6 supply interruptions per 100 customers and 32.5 minutes lost per customer, against 39.7 and 35.1 across Great Britain, and London Power Networks about 11.2 and 10.5. A Fox ESS system covers essential circuits in a cut only where EPS is designed and wired in.
Local facts, sourced
Fox ESS and North London 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 in Romford at about 143 kWh in December and 489 kWh in June; in Harrow about 140 kWh and 477 kWh.
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 3,928 solar PV installations across Havering and 3,477 across Barnet at the end of 2025; across the seven north London boroughs on these pages, about 20,359 (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 12,097 privately kept plug-in vehicles across Barnet at the end of June 2026, up from 10,089 a year earlier, and 7,524 across Harrow, up from 5,934.
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 centres of Harrow, Enfield, Edmonton and Romford sit in UK Power Networks’ Eastern Power Networks area; Walthamstow’s is in its London Power Networks area.
Source: UK Power Networks licence boundaries (December 2024) and NESO GB DNO licence areas (May 2024)
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Ofgem’s 2024/25 figures for Eastern Power Networks: about 44.6 supply interruptions per 100 customers and 32.5 minutes lost per customer, down from 46.2 and 35.6 in 2023/24.
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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41.2% of Havering’s 101,277 households live in semis, the second-highest share of London’s 33 local authorities, against 18.6% for London.
Source: ONS Census 2021, TS044 Accommodation type via Nomis (Havering, London and all London local authorities)
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Of Harrow’s 89,642 households, 37.1% live in semi-detached houses, 26.2% in purpose-built flats, 16.9% in terraces and 11.3% in detached houses.
Source: ONS Census 2021, TS044 and TS054, Harrow (E09000015), via the Nomis API
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DESNZ estimates about 23.48% of homes in Brent have no mains gas connection, against about 8.31% in Havering (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 North London
Town by town, with each town's own sunshine figures and network operator: battery storage in Barnet, battery storage in Finchley, battery storage in Hendon, battery storage in Edgware, battery storage in Harrow, battery storage in Wembley, battery storage in Muswell Hill, battery storage in Wood Green, battery storage in Tottenham, battery storage in Edmonton, battery storage in Enfield, battery storage in Walthamstow, battery storage in Chingford and battery storage in Romford.
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 North London. For a longer read, see Choosing a north London home battery: five brands compared.
Comparing systems for a North London home? See EnSmart in North London, Tesla Powerwall in North London, Sigenergy in North London and EcoFlow PowerOcean in North London.
Fox ESS in North London: questions
I live in a north London flat. Can I have a Fox ESS battery?
Only with the building owner’s agreement. UK Power Networks says the building owner’s permission is needed before solar or storage work starts on a multi-occupied building, and in parts of north London, such as Wembley Park ward where 98.2% of households live in purpose-built flats, that is most homes. If consent is given, the EP5 needs a wall or floor space of 380 × 625 mm plus the 300 mm clearance Fox ESS’s warranty asks for.
Would a Fox ESS battery keep my Havering semi running in a power cut?
Only if it is designed to, and then only in part. With a battery fitted, the H1-G2 inverter can provide EPS backup that switches over in under 10 milliseconds, but its output is limited to the inverter’s 3 to 6 kW rating and it covers nominated circuits, not the whole house, and only if those circuits were wired for it. Ofgem’s 2024/25 figures for Eastern Power Networks show about 44.6 interruptions per 100 customers over the year.
Does the Fox ESS warranty depend on who installs it in north London?
Yes, in two ways. Fox ESS’s UK battery policy says only the installer and Fox ESS authorised personnel can make a claim, and that installation by a non-accredited installer can void it. If the installing company later goes into administration, appointing a replacement to handle a claim falls to the homeowner. That is why we confirm in writing who would install and commission a Fox ESS system before anything is agreed.