Solar · Battery · EV — Greater London
Solar Panels Harrow
Solar panels, battery storage and EV chargers for homes in and around Harrow — designed from your actual usage, installed by an MCS-certified team, and explained in plain English before you commit to anything.
Harrow School's story starts in 1572, when Elizabeth I granted John Lyon, a land-owning farmer from Preston (now in Brent), a Royal Charter to endow a free grammar school for 30 local boys in Harrow on the Hill. The hill now holds eight of the borough's conservation areas, which is one reason any advice on solar panels Harrow homeowners can rely on begins with a planning check rather than a price. Below the hill the borough is suburban: semi-detached houses are its single largest housing type, home to 37.1% of households at the 2021 Census.
The sunshine record needs one honest footnote. The Met Office climate station nearest the town, at Northolt, does not record sunshine, so the closest that does is Northwood, to the north-west, which averaged 1,556 hours a year over 1991–2020, peaking at around 209 hours in July. That is ordinary, workable light for modern solar panels; your roof's direction and shading matter far more. If you are weighing up storage as well, our battery storage in Harrow page covers it, and if a survey shows panels would not pay their way on your house, we will say so.
Quick answer
Solar panels in Harrow:
- Cost: the Energy Saving Trust puts a typical 4.5 kWp home system (around 12 panels) at around £7,600 installed. Your own figure comes from a survey of your roof, not a table.
- Generation: PVGIS 5.3 estimates about 3,965 kWh a year from a 4 kWp south-facing array in Harrow, around 991 kWh per kWp.
- Payback: on the Energy Saving Trust's table, with export payments and fuel prices as of July 2026, a London home pays back in about 9 years.
- VAT: residential solar installations carry 0% VAT until 31 March 2027, then 5% from 1 April 2027.
- Battery: the Energy Saving Trust puts a 5 kWh battery at around £4,600; fitting it with the panels costs less than a separate visit later.
- Who fits it: HCE is a NAPIT member (73495), MCS-certified for solar PV via NAPIT, and a HIES Consumer Code member. Check both registers yourself.
Figures: Energy Saving Trust (solar, updated 27 August 2026; batteries, updated 19 August 2026) · HMRC VAT Notice 708/6 · PVGIS 5.3 (European Commission Joint Research Centre), run 2026-10-15. Each is cited in full further down this page.
Solar on Harrow's housing
Harrow's 89,642 households split very differently from Barnet's. Semis lead at 37.1%, ahead of purpose-built flats at 26.2%, terraces at 16.9% and detached houses at 11.3%, and 58.8% of households own their home, 30.1% outright. The town-centre wards are the exception: in Greenhill, 69.0% of households live in purpose-built flats and 47.5% rent privately, and Harrow on the Hill ward is 48.5% purpose-built flats. Step out to Headstone (44.4% semis), North Harrow (54.0%) or Kenton West (64.7%) and the semi becomes the norm, with owner-occupation reaching 74.8% in Kenton West. Marlborough is its own case, with 26.5% of households living in converted or shared houses, where the roof is usually shared.
Planning on the hill is layered. The eight Harrow on-the-Hill conservation areas have had a supplementary planning document since May 2008, and five of them (Harrow Park, Harrow on the Hill Village, South Hill Avenue, Mount Park Estate, and Roxborough Park and The Grove) carry Article 4 directions, which the council says mean you will need planning permission to carry out work in the area; Roxeth Hill, Harrow School and Sudbury Hill do not. One caution: the council's downloadable conservation-area householder guide still describes the 2008 rules, under which panels on a front roof slope visible from a highway needed permission. The current national text excludes only equipment on a wall, balcony or roof enclosure fronting a highway, keeps roof slopes permitted within the 0.2 m and roof-height limits, and requires a prior-approval check for flat roofs, but an Article 4 direction can still remove those rights, so in the five directed areas we read the direction first. Green belt, which covers 21.6% of the borough, does not by itself remove roof-mounted rights.
What London Borough of Harrow is doing
Harrow's full council debated a climate emergency motion on 18 July 2019 that resolved to aim to make the borough carbon neutral by 2030, and Cabinet agreed it on 12 September 2019. The council's Living Harrow climate and nature strategy for 2023–2030 is candid that borough-wide carbon neutrality by 2030 will be extremely challenging, while treating 2030 as potentially achievable for the council's own emissions. It makes the case for rooftop solar in plain terms, describing Harrow, as a suburban borough with a large proportion of houses, as well suited to the technology. The council has put panels on its own buildings too: the strategy records 65 solar panels and eight heat pumps at Harrow Arts Centre and, as of March 2023, a 311-panel, 155 kWp array being installed at its new Forward Drive hub.
Harrow residents have a track record with group buying. The strategy says that in the 2021 and 2022 Solar Together London rounds, organised by the GLA, more Harrow residents opted in than in any other London borough: 285 committed to panels and 139 of them also chose battery storage. Today the scheme, now called Switch Together, says on its Harrow page that it is not active in the area at the moment and invites residents to register for the next one. The income-linked route runs through the Greater London Authority's consortium for the Warm Homes: Local Grant, of which Harrow is a member, for privately owned homes at EPC D to G.
What solar costs on a Harrow home
The honest national anchor is the Energy Saving Trust's: a typical domestic system is around 4.5 kWp — roughly around 12 panels over 20 to 30m² of roof — and costs around £7,600 installed. On their payback table, with export payments and fuel prices as of July 2026, London homes sit at about 9 years. Across Harrow, 37.1% of households live in semi-detached houses and a further 16.9% in terraces (Census 2021), so for most house-dwellers the national figure is a fair first reference; in Greenhill, the town-centre ward, 69.0% of households are in purpose-built flats and the roof question comes first.
Two things move that number for everyone. Residential installations carry 0% VAT until 31 March 2027, reverting to 5% from 1 April 2027. And 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. A quote should itemise the panels, inverter, mounting, scaffolding, labour, commissioning, warranties and the DNO notification, so you can see what the total is made of — ours does, and it comes from a survey of your actual roof and usage, not from a table.
Sources: Energy Saving Trust — Solar panels: costs, savings and benefits explained (updated 27 August 2026) · HMRC — VAT on energy-saving materials and heating equipment (VAT Notice 708/6) · Ofgem — Smart Export Guarantee.
When we'd tell you not to fit solar in Harrow
A persistently shaded roof, a slope that faces mostly north, a listed building where consent will not carry the fixings, or a home whose daytime usage is so low that almost everything would be exported at a supplier-set rate — in those cases we will say so at the survey rather than sell you a system that under-delivers. Fabric-first improvements sometimes beat panels as the first spend, and we would rather tell you that than not.
Whoever you use, check the registers yourself: HCE is NAPIT member 73495 and an HIES Consumer Code member (HCE/A/1392), with MCS certification for solar PV via NAPIT — the certification an MCS-certified install needs for Smart Export Guarantee payments.
What a Harrow roof actually generates
Rather than quote a generic yield, we ran the European Commission's PVGIS 5.3 (European Commission Joint Research Centre) for Harrow itself. A 4 kWp array at 35° facing due south, with 14% system losses, is estimated at about 3,965 kWh a year — around 991 kWh per kWp — with a year-to-year variation of roughly ±154 kWh (PVGIS-SARAH3, 2005–2023). East- or west-facing slopes generate less, and shading changes the answer more than the town does; that is exactly what the survey measures.
Method: PVGIS 5.3 (European Commission Joint Research Centre), 4 kWp, 35° tilt, due south, 14% system losses, building-mounted, run 2026-10-15.
Local facts, sourced
Harrow in numbers
Every figure below comes from a named public source — the same standard we hold our savings estimates to.
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The Met Office station nearest Harrow, at Northolt, does not record sunshine; the nearest that does, at Northwood, averaged 1,556 hours a year over 1991–2020, from about 209 hours in July to about 51 in December.
Source: Met Office — Northwood and Northolt location-specific long-term averages, 1991–2020 (metoffice.gov.uk, stations gcptw7wjt and gcptq81bc)
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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; 58.8% own their home, 30.1% outright.
Source: ONS Census 2021, TS044 and TS054, Harrow (E09000015), via the Nomis API
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In Greenhill ward, which takes in the town centre, 69.0% of households live in purpose-built flats and 47.5% rent privately; Harrow on the Hill ward is 48.5% purpose-built flats.
Source: ONS Census 2021, TS044 and TS054, Greenhill (E05013546) and Harrow on the Hill (E05013547) wards, via the Nomis API; ward of the town-centre postcode via postcodes.io
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The Greenhill, Harrow on the Hill, Marlborough and West Harrow wards had 44,154 usual residents between them (our sum of the four ward counts), in a borough of 261,203.
Source: ONS Census 2021, TS001 usual residents, ward and local-authority counts, via the Nomis API
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Harrow has 30 conservation areas; eight are on Harrow on the Hill, covered by a supplementary planning document adopted in May 2008, and five of those carry Article 4 directions.
Source: London Borough of Harrow — Conservation areas and Article 4; Harrow on-the-Hill conservation areas (harrow.gov.uk)
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Homes in Harrow borough have a median EPC score of 69 with 50.5% at band C or above; in the Harrow West constituency the median is 71, but the median detached house scores 58, in band D.
Source: ONS — Energy efficiency of housing in England and Wales, EPC records to March 2025 (released 28 October 2025), tables 2a, 4a and 4b, and band C or above tables 2a and 4a
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In the 2021 and 2022 Solar Together London rounds, more Harrow residents opted in than in any other London borough: 285 committed to panels and 139 also chose battery storage.
Source: London Borough of Harrow — Living Harrow: Climate and Nature Strategy 2023–2030 (November 2023), section 2.1.3
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Harrow's full council debated a climate emergency motion on 18 July 2019 resolving to aim for a carbon-neutral borough by 2030; Cabinet agreed it on 12 September 2019.
Source: London Borough of Harrow — Living Harrow: Climate and Nature Strategy 2023–2030 (November 2023), 'The Council's Targets'
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21.6% of Harrow borough (1,090 of 5,050 hectares) is designated green belt, against 22.1% of London, as at 31 March 2025.
Source: MHCLG — Local authority green belt statistics for England 2024-25, live tables (Area by LA)
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Harrow School was founded in 1572 under a Royal Charter granted by Elizabeth I to John Lyon, to endow a free grammar school for 30 local boys in Harrow on the Hill.
Source: Harrow School — Welcome; About the Foundation and Family (harrowschool.org.uk)
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Harrow town centre sits inside UK Power Networks' Eastern (EPN) licence area, as are Barnet, Finchley, Hendon and Edgware; UKPN gives automatic approval to home solar and battery systems exporting under 5 kW.
Source: UK Power Networks Open Data — licence boundaries dataset (town-centre point check); UKPN, Solar and storage: cost, time and what's involved
Data last reviewed: October 2026
Where we work around Harrow
We quote for homes in and around Harrow, including Harrow on the Hill, Greenhill, Wealdstone, West Harrow, South Harrow, North Harrow, Harrow Weald and Kenton, across the HA1, HA2, HA3 postcode districts. Every quote starts with a free survey of your actual roof and usage — if solar wouldn't pay its way on your home, we'll say so plainly. Try the numbers first on our savings calculator, or read how we approach installations across North London.
If you are weighing storage as well, our page on battery storage in Harrow sets out what a battery does on a Harrow roof through the year, and what it costs. For a longer local read, see What would solar cost on a Harrow semi? A worked example.
Harrow solar questions
Do I need planning permission for solar panels on Harrow on the Hill?
On five of the hill's eight conservation areas, check first. Harrow Park, Harrow on the Hill Village, South Hill Avenue, Mount Park Estate, and Roxborough Park and The Grove all carry Article 4 directions, which Harrow says mean you will need planning permission to carry out work in the area; the direction's wording decides whether roof panels are caught. Roxeth Hill, Harrow School and Sudbury Hill have no direction, so the national rule applies there: roof slopes stay permitted development within the 0.2 m and roof-height limits, only equipment on a wall, balcony or roof enclosure fronting a highway is excluded, and a flat roof needs prior approval. Listed buildings always need listed building consent. We check the designation for your address before quoting.
Harrow's conservation-area leaflet says front roof slopes need permission. Is that still right?
Not under the current national rules, unless an Article 4 direction says otherwise. Harrow's downloadable householder guide for conservation areas refers to the 2008 amendment order, under which panels on a front roof slope visible from a highway needed planning permission. The permitted development text in force now (Part 14, Class A) excludes only equipment on a wall, balcony or roof enclosure fronting a highway in a conservation area, and keeps roof slopes permitted within the 0.2 m and roof-height limits. Where a direction applies, as on five of Harrow on the Hill's conservation areas, the direction governs, so that is what we read first.
What would a 4 kWp system generate in Harrow, and what does it cost?
Harrow town centre's PVGIS 5.3 result (our run, 15 October 2026) is about 3,965 kWh a year from 4 kWp, or 991 kWh per kWp, for a due-south roof at 35° with 14% losses; across the 2005–2023 PVGIS-SARAH3 record a single year typically lands within about ±154 kWh of that. It squares with the 1,556 sunshine hours a year averaged at Northwood, the nearest Met Office station with a sunshine record. The cost side is a national benchmark: around £7,600 for a typical 4.5 kWp, twelve-panel system on the Energy Saving Trust's figures, with no VAT on a residential install until 31 March 2027 and 5% after. In North Harrow and Kenton West, where semis are the majority of homes, the shape of the semi's roof usually decides how many panels fit, and the survey measures that.
Is the Solar Together group scheme open in Harrow?
Not at the moment. Harrow took part in the 2021 and 2022 Solar Together London rounds, and its climate strategy says more Harrow residents opted in than in any other London borough, with 285 committing to panels and 139 adding batteries. The scheme now trades as Switch Together, and its Harrow page says it is not active in the area at present and invites residents to register for the next scheme. There is no general government grant for household solar in England; the income-linked Warm Homes: Local Grant runs in Harrow through the Greater London Authority's consortium. Registering for a future round and getting an independent quote are not mutually exclusive.
Nearby
We also cover solar panels in Wembley, solar installation Edgware and Hendon solar and battery installers.
Also for Harrow homes
Solar is usually the first step, not the last. If you are set on a particular battery, we can talk you through Tesla Powerwall; if you are wondering whether a battery would pay its way, we can talk you through home battery storage; if you are charging a car at home, we can talk you through a home EV charge point; and if you are comparing battery brands, we can talk you through Sigenergy storage systems. Every one of them starts the same way — a free survey of your actual roof, usage and property, and a straight answer about whether it is worth doing.