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Solar panel cost in Buckinghamshire (HP5)

See realistic solar installation costs, savings and payback for HP5 (Buckinghamshire) 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
10.0 years
After this, it's pure profit
Upfront Cost
£8,139
What you pay to get started
Annual Benefit
£812
What you save every year
Profit Over 25 Years
£12,154
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 Eastern, the current unit rate is 26.38p/kWh with a 53.94p/day standing charge. Your postcode’s south-facing sunshine yield is 981 kWh/kW — 28 below the regional median (1009).

Read the full story

A typical roof here lands around 5.0 kW, with most eligible homes comfortably fitting within 3–6 kW. Each kilowatt of panels produces roughly 981 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
53.9p/day
Sunshine yield (south)
981 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: £812, Upfront: £8,139, Break-even: 10.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1962 kWh 785 kWh 1177 kWh £207 £118 £325 £3,256 10.0 yrs £3,238
3 kW 2942 kWh 1177 kWh 1765 kWh £310 £177 £487 £4,883 10.0 yrs £4,857
4 kW 3923 kWh 1569 kWh 2354 kWh £414 £235 £649 £6,511 10.0 yrs £6,476
5 kW 4904 kWh 1962 kWh 2942 kWh £517 £294 £812 £8,139 10.0 yrs £8,095
6 kW 5885 kWh 2354 kWh 3531 kWh £621 £353 £974 £9,767 10.0 yrs £9,714
7 kW 6866 kWh 2746 kWh 4119 kWh £724 £412 £1,136 £11,394 10.0 yrs £11,333
8 kW 7846 kWh 3139 kWh 4708 kWh £828 £471 £1,299 £13,022 10.0 yrs £12,952

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,628, battery £/kWh = 700.

3 kWh battery 5 kW example → Annual benefit: £972, Upfront: £10,239, Break-even: 10.5 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1962 kWh 1177 kWh 785 kWh £310 £78 £389 £5,356 13.8 yrs £2,423
3 kW 2942 kWh 1765 kWh 1177 kWh £466 £118 £583 £6,983 12.0 yrs £4,685
4 kW 3923 kWh 2354 kWh 1569 kWh £621 £157 £778 £8,611 11.1 yrs £6,947
5 kW 4904 kWh 2942 kWh 1962 kWh £776 £196 £972 £10,239 10.5 yrs £9,208
6 kW 5885 kWh 3531 kWh 2354 kWh £931 £235 £1,167 £11,867 10.2 yrs £11,470
7 kW 6866 kWh 4119 kWh 2746 kWh £1,087 £275 £1,361 £13,494 9.9 yrs £13,732
8 kW 7846 kWh 4708 kWh 3139 kWh £1,242 £314 £1,556 £15,122 9.7 yrs £15,993

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,628, battery £/kWh = 700.

5 kWh battery 5 kW example → Annual benefit: £1,053, Upfront: £11,639, Break-even: 11.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1962 kWh 1373 kWh 588 kWh £362 £59 £421 £6,756 16.0 yrs £1,666
3 kW 2942 kWh 2060 kWh 883 kWh £543 £88 £632 £8,383 13.3 yrs £4,249
4 kW 3923 kWh 2746 kWh 1177 kWh £724 £118 £842 £10,011 11.9 yrs £6,832
5 kW 4904 kWh 3433 kWh 1471 kWh £906 £147 £1,053 £11,639 11.1 yrs £9,415
6 kW 5885 kWh 4119 kWh 1765 kWh £1,087 £177 £1,263 £13,267 10.5 yrs £11,998
7 kW 6866 kWh 4806 kWh 2060 kWh £1,268 £206 £1,474 £14,894 10.1 yrs £14,581
8 kW 7846 kWh 5492 kWh 2354 kWh £1,449 £235 £1,684 £16,522 9.8 yrs £17,164

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,628, battery £/kWh = 700.

7.5 kWh battery 5 kW example → Annual benefit: £1,077, Upfront: £13,389, Break-even: 12.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1962 kWh 1432 kWh 530 kWh £378 £53 £431 £8,506 19.7 yrs £109
3 kW 2942 kWh 2148 kWh 794 kWh £567 £79 £646 £10,133 15.7 yrs £2,788
4 kW 3923 kWh 2864 kWh 1059 kWh £755 £106 £861 £11,761 13.7 yrs £5,467
5 kW 4904 kWh 3580 kWh 1324 kWh £944 £132 £1,077 £13,389 12.4 yrs £8,147
6 kW 5885 kWh 4296 kWh 1589 kWh £1,133 £159 £1,292 £15,017 11.6 yrs £10,826
7 kW 6866 kWh 5012 kWh 1854 kWh £1,322 £185 £1,507 £16,644 11.0 yrs £13,506
8 kW 7846 kWh 5728 kWh 2119 kWh £1,511 £212 £1,723 £18,272 10.6 yrs £16,185

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,628, battery £/kWh = 700.

10 kWh battery 5 kW example → Annual benefit: £1,093, Upfront: £15,139, Break-even: 13.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1962 kWh 1471 kWh 490 kWh £388 £49 £437 £10,256 23.5 yrs £-1,513
3 kW 2942 kWh 2207 kWh 736 kWh £582 £74 £656 £11,883 18.1 yrs £1,231
4 kW 3923 kWh 2942 kWh 981 kWh £776 £98 £874 £13,511 15.5 yrs £3,974
5 kW 4904 kWh 3678 kWh 1226 kWh £970 £123 £1,093 £15,139 13.9 yrs £6,718
6 kW 5885 kWh 4414 kWh 1471 kWh £1,164 £147 £1,311 £16,767 12.8 yrs £9,462
7 kW 6866 kWh 5149 kWh 1716 kWh £1,358 £172 £1,530 £18,394 12.0 yrs £12,205
8 kW 7846 kWh 5885 kWh 1962 kWh £1,552 £196 £1,749 £20,022 11.5 yrs £14,949

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,628, battery £/kWh = 700.

13.5 kWh battery 5 kW example → Annual benefit: £1,109, Upfront: £17,589, Break-even: 15.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1962 kWh 1510 kWh 451 kWh £398 £45 £444 £12,706 28.6 yrs £-3,834
3 kW 2942 kWh 2266 kWh 677 kWh £598 £68 £665 £14,333 21.5 yrs £-1,026
4 kW 3923 kWh 3021 kWh 902 kWh £797 £90 £887 £15,961 18.0 yrs £1,782
5 kW 4904 kWh 3776 kWh 1128 kWh £996 £113 £1,109 £17,589 15.9 yrs £4,589
6 kW 5885 kWh 4531 kWh 1353 kWh £1,195 £135 £1,331 £19,217 14.4 yrs £7,397
7 kW 6866 kWh 5286 kWh 1579 kWh £1,395 £158 £1,552 £20,844 13.4 yrs £10,205
8 kW 7846 kWh 6042 kWh 1805 kWh £1,594 £180 £1,774 £22,472 12.7 yrs £13,013

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,628, 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 Buckinghamshire

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 HP5

Figures below are tailored to HP5 — click through for full league tables.

Big-Roof Britain Rank #1309 of 2182
4.8 kWp (UK avg 5.1 kWp)
~10 panels (≈430 W)
Solar Payback Index Rank #1105 of 2996
10.0 years (UK avg 10.8 years)
~£812 /yr • £8,139 upfront
Standing-Charge Drag Rank #1287 of 2996
24.3% (UK avg 26.6%) drag on savings
£197 fixed • ~£812 /yr value
Aspect Penalty View ranking →
East −20.9% West −20.0%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in HP5

Monthly generation per kilowatt of solar panels

kWh 37 Jan 51 Feb 84 Mar 111 Apr 117 May 119 Jun 120 Jul 108 Aug 93 Sep 65 Oct 43 Nov 32 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 48.8% 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 40 kWh per month; the average month produces around 82 kWh. So a typical 4 kW home system would generate roughly 160 kWh in winter, or 327 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
26.38p/kWh
Daily Fixed Charge
53.94p/day
Local Sunshine
981kWh/kW
A 1 kW system generates ~981 kWh per year. A typical home uses ~2,700 kWh per year.
Typical System Size
5.0kW
For houses & bungalows in this area

Local Property Data

Property Types

Houses: 62% • Flats: 25% • Bungalows: 9% Based on 6,729 properties

Coverage

Buckinghamshire (100%)

Areas Covered

Chesham North, Chesham South, Chalfont St Giles & Little Chalfont, Bovingdon, Flaunden and Chipperfield, Amersham & Chesham Bois

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 Eastern

HP6 (Buckinghamshire)
≈4.4 km away
Local sunshine: ~986 kWh/kWp · +1% vs HP5
HP7 (Buckinghamshire)
≈5.2 km away
Local sunshine: ~978 kWh/kWp · -0% vs HP5
HP4 (Dacorum)
≈5.9 km away
Local sunshine: ~983 kWh/kWp · +0% vs HP5
HP16 (Buckinghamshire)
≈7.0 km away
Local sunshine: ~975 kWh/kWp · -1% vs HP5
HP23 (Dacorum)
≈9.5 km away
Local sunshine: ~980 kWh/kWp · -0% vs HP5
HP1 (Dacorum)
≈10.0 km away
Local sunshine: ~989 kWh/kWp · +1% vs HP5

Similar sunshine across the UK

GL6 (Stroud)
~981 kWh/kWp · -0% vs HP5
LA14 (Westmorland and Furness)
~981 kWh/kWp · +0% vs HP5
CV37 (Stratford-on-Avon)
~981 kWh/kWp · +0% vs HP5