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Solar panel cost in Hillingdon (UB7)

See realistic solar installation costs, savings and payback for UB7 (Hillingdon) in under a minute using official UK data. Start with the calculator, then get a no-obligation quote from an MCS-certified installer. You can also ask the SolarByPostcode assistant to sanity-check your roof, bills and plans.

Solar Calculator

Change the settings below to see how costs and savings work for your situation.

System Size

Roof Direction

Battery Storage

Export Value

Your Numbers

Break-even
11.0 years
After this, it's pure profit
Upfront Cost
£7,307
What you pay to get started
Annual Benefit
£667
What you save every year
Profit Over 25 Years
£9,375
After paying itself off, you're this much ahead

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How we calculate this

Solar generation: Based on typical south-facing roof at 35° angle. We account for weather, dirt, and system losses (14%).

How much you'll use directly:

  • Without battery: You'll use about 40% of what you generate. The rest gets sold back to the grid.
  • With 5 kWh battery: You'll use about 70% (battery stores extra for evening use).
  • With 10 kWh battery: You'll use about 75% (more storage means less exported).
  • Panel-only payback: The official cost per kW is lower above 4 kW, so a 5–6 kW system can pay back a little faster than a 3–4 kW system on otherwise identical assumptions.
  • Battery & payback: Batteries raise self-use and cut bills, but added hardware cost often lengthens break-even at typical UK rates.
  • When a battery can still make sense:
    • Evening-heavy usage patterns
    • Time-of-use tariffs / cheap night rates
    • Low export rate vs. high unit rate
    • Heat pump or EV charging synergy
    • Optional backup/resilience (system-dependent)
    • Lower evening-hour CO₂ vs. grid

Panel costs: Uses March 2026 TIC mean installation costs: £1,827/kW up to 4 kW and £1,628/kW above 4 kW.

Other costs: Battery prices are modelled at £700 per kWh. Export tariffs vary by supplier (usually 5–15p per kWh).

Grid connection: Systems up to about 3.7 kW typically need just a notification (G98). Larger systems may need permission (G99).

These are typical values based on average usage patterns. Your actual results will vary based on your roof, shading, and how you use electricity.

Your area in context

In Southern, the current unit rate is 26.42p/kWh with a 49.70p/day standing charge. Your postcode’s south-facing sunshine yield is 1007 kWh/kW — 6 above the regional median (1001).

Read the full story

A typical roof here lands around 4.0 kW, with most eligible homes comfortably fitting within 3–6 kW. Each kilowatt of panels produces roughly 1007 kWh per year on a south-facing roof. We value self-used electricity at 26.4p and exported surplus at a baseline 10p via SEG. Use the calculator above for your exact tariff.

Unit rate
26.4p/kWh
Standing charge
49.7p/day
Sunshine yield (south)
1007 kWh/kW
Export price (baseline)
10p/kWh

Browse the scenarios below. Each battery size has its own expand — open the one that matches your plan (or just explore). For each system size (2–8 kW) we show annual output, how much you use directly, what gets exported, annual benefit, upfront cost, break-even, and a 20-year net. Negative numbers are possible — that’s the honest trade-off when adding more battery than your usage profile justifies.

No battery 5 kW example → Annual benefit: £834, Upfront: £9,134, Break-even: 11.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2014 kWh 806 kWh 1208 kWh £213 £121 £334 £3,654 11.0 yrs £3,019
3 kW 3021 kWh 1208 kWh 1812 kWh £319 £181 £500 £5,481 11.0 yrs £4,529
4 kW 4028 kWh 1611 kWh 2417 kWh £426 £242 £667 £7,307 11.0 yrs £6,039
5 kW 5035 kWh 2014 kWh 3021 kWh £532 £302 £834 £9,134 11.0 yrs £7,549
6 kW 6042 kWh 2417 kWh 3625 kWh £638 £362 £1,001 £10,961 11.0 yrs £9,058
7 kW 7049 kWh 2819 kWh 4229 kWh £745 £423 £1,168 £12,788 11.0 yrs £10,568
8 kW 8055 kWh 3222 kWh 4833 kWh £851 £483 £1,335 £14,615 11.0 yrs £12,078

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,827, battery £/kWh = 700.

3 kWh battery 5 kW example → Annual benefit: £999, Upfront: £11,234, Break-even: 11.2 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2014 kWh 1208 kWh 806 kWh £319 £81 £400 £5,754 14.4 yrs £2,242
3 kW 3021 kWh 1812 kWh 1208 kWh £479 £121 £600 £7,581 12.6 yrs £4,413
4 kW 4028 kWh 2417 kWh 1611 kWh £638 £161 £800 £9,407 11.8 yrs £6,584
5 kW 5035 kWh 3021 kWh 2014 kWh £798 £201 £999 £11,234 11.2 yrs £8,755
6 kW 6042 kWh 3625 kWh 2417 kWh £958 £242 £1,199 £13,061 10.9 yrs £10,926
7 kW 7049 kWh 4229 kWh 2819 kWh £1,117 £282 £1,399 £14,888 10.6 yrs £13,098
8 kW 8055 kWh 4833 kWh 3222 kWh £1,277 £322 £1,599 £16,715 10.5 yrs £15,269

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,827, battery £/kWh = 700.

5 kWh battery 5 kW example → Annual benefit: £1,082, Upfront: £12,634, Break-even: 11.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2014 kWh 1410 kWh 604 kWh £372 £60 £433 £7,154 16.5 yrs £1,504
3 kW 3021 kWh 2115 kWh 906 kWh £559 £91 £649 £8,981 13.8 yrs £4,005
4 kW 4028 kWh 2819 kWh 1208 kWh £745 £121 £866 £10,807 12.5 yrs £6,507
5 kW 5035 kWh 3524 kWh 1510 kWh £931 £151 £1,082 £12,634 11.7 yrs £9,009
6 kW 6042 kWh 4229 kWh 1812 kWh £1,117 £181 £1,299 £14,461 11.1 yrs £11,511
7 kW 7049 kWh 4934 kWh 2115 kWh £1,304 £211 £1,515 £16,288 10.8 yrs £14,012
8 kW 8055 kWh 5639 kWh 2417 kWh £1,490 £242 £1,731 £18,115 10.5 yrs £16,514

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,827, battery £/kWh = 700.

7.5 kWh battery 5 kW example → Annual benefit: £1,107, Upfront: £14,384, Break-even: 13.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2014 kWh 1470 kWh 544 kWh £388 £54 £443 £8,904 20.1 yrs £-48
3 kW 3021 kWh 2205 kWh 816 kWh £583 £82 £664 £10,731 16.2 yrs £2,553
4 kW 4028 kWh 2940 kWh 1087 kWh £777 £109 £886 £12,557 14.2 yrs £5,154
5 kW 5035 kWh 3675 kWh 1359 kWh £971 £136 £1,107 £14,384 13.0 yrs £7,755
6 kW 6042 kWh 4410 kWh 1631 kWh £1,165 £163 £1,328 £16,211 12.2 yrs £10,356
7 kW 7049 kWh 5145 kWh 1903 kWh £1,359 £190 £1,550 £18,038 11.6 yrs £12,957
8 kW 8055 kWh 5880 kWh 2175 kWh £1,554 £217 £1,771 £19,865 11.2 yrs £15,558

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,827, battery £/kWh = 700.

10 kWh battery 5 kW example → Annual benefit: £1,123, Upfront: £16,134, Break-even: 14.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2014 kWh 1510 kWh 503 kWh £399 £50 £449 £10,654 23.7 yrs £-1,666
3 kW 3021 kWh 2266 kWh 755 kWh £599 £76 £674 £12,481 18.5 yrs £1,001
4 kW 4028 kWh 3021 kWh 1007 kWh £798 £101 £899 £14,307 15.9 yrs £3,668
5 kW 5035 kWh 3776 kWh 1259 kWh £998 £126 £1,123 £16,134 14.4 yrs £6,335
6 kW 6042 kWh 4531 kWh 1510 kWh £1,197 £151 £1,348 £17,961 13.3 yrs £9,003
7 kW 7049 kWh 5286 kWh 1762 kWh £1,397 £176 £1,573 £19,788 12.6 yrs £11,670
8 kW 8055 kWh 6042 kWh 2014 kWh £1,596 £201 £1,798 £21,615 12.0 yrs £14,337

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,827, battery £/kWh = 700.

13.5 kWh battery 5 kW example → Annual benefit: £1,140, Upfront: £18,584, Break-even: 16.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2014 kWh 1551 kWh 463 kWh £410 £46 £456 £13,104 28.7 yrs £-3,984
3 kW 3021 kWh 2326 kWh 695 kWh £615 £69 £684 £14,931 21.8 yrs £-1,250
4 kW 4028 kWh 3101 kWh 926 kWh £819 £93 £912 £16,757 18.4 yrs £1,483
5 kW 5035 kWh 3877 kWh 1158 kWh £1,024 £116 £1,140 £18,584 16.3 yrs £4,216
6 kW 6042 kWh 4652 kWh 1390 kWh £1,229 £139 £1,368 £20,411 14.9 yrs £6,949
7 kW 7049 kWh 5427 kWh 1621 kWh £1,434 £162 £1,596 £22,238 13.9 yrs £9,683
8 kW 8055 kWh 6203 kWh 1853 kWh £1,639 £185 £1,824 £24,065 13.2 yrs £12,416

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,827, battery £/kWh = 700.

Figures are illustrative and use the same method as the calculator above. For exact results, adjust your roof direction, tariff, and usage in the calculator.

Before you request quotes in Hillingdon

Use the numbers above to sanity-check installer quotes. The main things to compare are system size, battery assumptions, payback claims, MCS certification, DNO paperwork and export assumptions.

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Understand DNO, G98 and G99 export limits

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Insights for UB7

Figures below are tailored to UB7 — click through for full league tables.

Big-Roof Britain Rank #1998 of 2182
4.1 kWp (UK avg 5.1 kWp)
~9 panels (≈430 W)
Solar Payback Index Rank #2042 of 2996
11.0 years (UK avg 10.8 years)
~£667 /yr • £7,307 upfront
Standing-Charge Drag Rank #1765 of 2996
27.1% (UK avg 26.6%) drag on savings
£181 fixed • ~£667 /yr value
Aspect Penalty View ranking →
East −22.0% West −19.6%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in UB7

Monthly generation per kilowatt of solar panels

kWh 40 Jan 53 Feb 86 Mar 112 Apr 119 May 121 Jun 122 Jul 110 Aug 94 Sep 68 Oct 47 Nov 35 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 51.0% of an average month (Dec–Feb)

Best / worst month: Jul / Dec

These figures show output per kilowatt (kW) of panels installed. In winter, a 1 kW system here produces about 43 kWh per month; the average month produces around 84 kWh. So a typical 4 kW home system would generate roughly 171 kWh in winter, or 336 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
26.42p/kWh
Daily Fixed Charge
49.70p/day
Local Sunshine
1007kWh/kW
A 1 kW system generates ~1007 kWh per year. A typical home uses ~2,700 kWh per year.
Typical System Size
4.0kW
For houses & bungalows in this area

Local Property Data

Property Types

Houses: 47% • Flats: 47% • Bungalows: 2% Based on 10,232 properties

Coverage

Hillingdon (100%)

Areas Covered

West Drayton, Yiewsley, Heathrow Villages, Uxbridge, Hayes Town, Pinkwell, Greenford Broadway, Colham & Cowley

Data Sources & Assumptions

Solar yield: PVGIS (EU Joint Research Centre), January 2025 data

Electricity rates: Ofgem price cap, Q3 2026

Installation costs: DESNZ/MCS data, March 2026 (TIC)

Property data: EPC open data (Open Government Licence), aggregated

All estimates are typical values. Actual results vary based on your specific situation, roof characteristics, and usage patterns.

Compare nearby areas

Nearby in Southern

UB11 (Hillingdon)
≈1.9 km away
Local sunshine: ~996 kWh/kWp · -1% vs UB7
SL0 (Buckinghamshire)
≈3.2 km away
Local sunshine: ~1,002 kWh/kWp · -0% vs UB7
UB8 (Hillingdon)
≈3.4 km away
Local sunshine: ~1,000 kWh/kWp · -1% vs UB7
UB3 (Hillingdon)
≈3.8 km away
Local sunshine: ~996 kWh/kWp · -1% vs UB7
SL95 (Slough)
≈4.3 km away
Local sunshine: ~998 kWh/kWp · -1% vs UB7
TW6 (Hillingdon)
≈4.3 km away
Local sunshine: ~1,007 kWh/kWp · -0% vs UB7

Similar sunshine across the UK

PE9 (South Kesteven)
~1,007 kWh/kWp · +0% vs UB7
MK44 (Bedford)
~1,007 kWh/kWp · -0% vs UB7
NR27 (North Norfolk)
~1,007 kWh/kWp · +0% vs UB7