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Solar panel cost in Buckinghamshire (HP6)

See realistic solar installation costs, savings and payback for HP6 (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
£9,767
What you pay to get started
Annual Benefit
£979
What you save every year
Profit Over 25 Years
£14,718
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 986 kWh/kW — 23 below the regional median (1009).

Read the full story

A typical roof here lands around 6.0 kW, with most eligible homes comfortably fitting within 3–6 kW. Each kilowatt of panels produces roughly 986 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)
986 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: £816, 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 1972 kWh 789 kWh 1183 kWh £208 £118 £326 £3,256 10.0 yrs £3,274
3 kW 2958 kWh 1183 kWh 1775 kWh £312 £178 £490 £4,883 10.0 yrs £4,910
4 kW 3945 kWh 1578 kWh 2367 kWh £416 £237 £653 £6,511 10.0 yrs £6,547
5 kW 4931 kWh 1972 kWh 2958 kWh £520 £296 £816 £8,139 10.0 yrs £8,184
6 kW 5917 kWh 2367 kWh 3550 kWh £624 £355 £979 £9,767 10.0 yrs £9,821
7 kW 6903 kWh 2761 kWh 4142 kWh £728 £414 £1,143 £11,394 10.0 yrs £11,458
8 kW 7889 kWh 3156 kWh 4734 kWh £832 £473 £1,306 £13,022 10.0 yrs £13,095

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: £978, 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 1972 kWh 1183 kWh 789 kWh £312 £79 £391 £5,356 13.7 yrs £2,466
3 kW 2958 kWh 1775 kWh 1183 kWh £468 £118 £587 £6,983 11.9 yrs £4,749
4 kW 3945 kWh 2367 kWh 1578 kWh £624 £158 £782 £8,611 11.0 yrs £7,032
5 kW 4931 kWh 2958 kWh 1972 kWh £780 £197 £978 £10,239 10.5 yrs £9,315
6 kW 5917 kWh 3550 kWh 2367 kWh £937 £237 £1,173 £11,867 10.1 yrs £11,598
7 kW 6903 kWh 4142 kWh 2761 kWh £1,093 £276 £1,369 £13,494 9.9 yrs £13,881
8 kW 7889 kWh 4734 kWh 3156 kWh £1,249 £316 £1,564 £15,122 9.7 yrs £16,164

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: £1,058, Upfront: £11,639, 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 1972 kWh 1381 kWh 592 kWh £364 £59 £423 £6,756 16.0 yrs £1,712
3 kW 2958 kWh 2071 kWh 888 kWh £546 £89 £635 £8,383 13.2 yrs £4,318
4 kW 3945 kWh 2761 kWh 1183 kWh £728 £118 £847 £10,011 11.8 yrs £6,924
5 kW 4931 kWh 3452 kWh 1479 kWh £911 £148 £1,058 £11,639 11.0 yrs £9,530
6 kW 5917 kWh 4142 kWh 1775 kWh £1,093 £178 £1,270 £13,267 10.4 yrs £12,136
7 kW 6903 kWh 4832 kWh 2071 kWh £1,275 £207 £1,482 £14,894 10.1 yrs £14,742
8 kW 7889 kWh 5522 kWh 2367 kWh £1,457 £237 £1,694 £16,522 9.8 yrs £17,348

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: £1,083, 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 1972 kWh 1440 kWh 533 kWh £380 £53 £433 £8,506 19.6 yrs £156
3 kW 2958 kWh 2160 kWh 799 kWh £570 £80 £650 £10,133 15.6 yrs £2,859
4 kW 3945 kWh 2880 kWh 1065 kWh £760 £107 £866 £11,761 13.6 yrs £5,562
5 kW 4931 kWh 3599 kWh 1331 kWh £950 £133 £1,083 £13,389 12.4 yrs £8,265
6 kW 5917 kWh 4319 kWh 1598 kWh £1,139 £160 £1,299 £15,017 11.6 yrs £10,968
7 kW 6903 kWh 5039 kWh 1864 kWh £1,329 £186 £1,516 £16,644 11.0 yrs £13,671
8 kW 7889 kWh 5759 kWh 2130 kWh £1,519 £213 £1,732 £18,272 10.5 yrs £16,374

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: £1,099, Upfront: £15,139, Break-even: 13.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1972 kWh 1479 kWh 493 kWh £390 £49 £440 £10,256 23.3 yrs £-1,465
3 kW 2958 kWh 2219 kWh 740 kWh £585 £74 £659 £11,883 18.0 yrs £1,303
4 kW 3945 kWh 2958 kWh 986 kWh £780 £99 £879 £13,511 15.4 yrs £4,070
5 kW 4931 kWh 3698 kWh 1233 kWh £976 £123 £1,099 £15,139 13.8 yrs £6,838
6 kW 5917 kWh 4438 kWh 1479 kWh £1,171 £148 £1,319 £16,767 12.7 yrs £9,605
7 kW 6903 kWh 5177 kWh 1726 kWh £1,366 £173 £1,538 £18,394 12.0 yrs £12,373
8 kW 7889 kWh 5917 kWh 1972 kWh £1,561 £197 £1,758 £20,022 11.4 yrs £15,140

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: £1,115, Upfront: £17,589, Break-even: 15.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1972 kWh 1519 kWh 454 kWh £401 £45 £446 £12,706 28.5 yrs £-3,786
3 kW 2958 kWh 2278 kWh 680 kWh £601 £68 £669 £14,333 21.4 yrs £-953
4 kW 3945 kWh 3037 kWh 907 kWh £801 £91 £892 £15,961 17.9 yrs £1,879
5 kW 4931 kWh 3797 kWh 1134 kWh £1,002 £113 £1,115 £17,589 15.8 yrs £4,711
6 kW 5917 kWh 4556 kWh 1361 kWh £1,202 £136 £1,338 £19,217 14.4 yrs £7,543
7 kW 6903 kWh 5315 kWh 1588 kWh £1,402 £159 £1,561 £20,844 13.4 yrs £10,375
8 kW 7889 kWh 6075 kWh 1815 kWh £1,603 £181 £1,784 £22,472 12.6 yrs £13,207

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 HP6

Figures below are tailored to HP6 — click through for full league tables.

Big-Roof Britain Rank #495 of 2182
5.6 kWp (UK avg 5.1 kWp)
~12 panels (≈430 W)
Solar Payback Index Rank #1106 of 2996
10.0 years (UK avg 10.8 years)
~£979 /yr • £9,767 upfront
Standing-Charge Drag Rank #585 of 2996
20.1% (UK avg 26.6%) drag on savings
£197 fixed • ~£979 /yr value
Aspect Penalty View ranking →
East −21.5% West −19.2%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in HP6

Monthly generation per kilowatt of solar panels

kWh 39 Jan 52 Feb 84 Mar 110 Apr 117 May 119 Jun 120 Jul 108 Aug 92 Sep 65 Oct 45 Nov 34 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 50.5% 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 42 kWh per month; the average month produces around 82 kWh. So a typical 4 kW home system would generate roughly 166 kWh in winter, or 329 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
26.38p/kWh
Daily Fixed Charge
53.94p/day
Local Sunshine
986kWh/kW
A 1 kW system generates ~986 kWh per year. A typical home uses ~2,700 kWh per year.
Typical System Size
6.0kW
For houses & bungalows in this area

Local Property Data

Property Types

Houses: 64% • Flats: 25% • Bungalows: 7% Based on 3,580 properties

Coverage

Buckinghamshire (100%)

Areas Covered

Amersham & Chesham Bois, Chalfont St Giles & Little Chalfont, The Missendens, Chesham North

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

HP7 (Buckinghamshire)
≈0.8 km away
Local sunshine: ~978 kWh/kWp · -1% vs HP6
HP5 (Buckinghamshire)
≈4.4 km away
Local sunshine: ~981 kWh/kWp · -1% vs HP6
HP16 (Buckinghamshire)
≈7.6 km away
Local sunshine: ~975 kWh/kWp · -1% vs HP6
WD3 (Three Rivers)
≈9.8 km away
Local sunshine: ~992 kWh/kWp · +1% vs HP6
HP4 (Dacorum)
≈10.0 km away
Local sunshine: ~983 kWh/kWp · -0% vs HP6
WD4 (Dacorum)
≈11.6 km away
Local sunshine: ~989 kWh/kWp · +0% vs HP6

Similar sunshine across the UK

LE8 (Blaby)
~986 kWh/kWp · +0% vs HP6
EX31 (North Devon)
~986 kWh/kWp · -0% vs HP6
FY4 (Blackpool)
~986 kWh/kWp · +0% vs HP6