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Solar panel cost in South Derbyshire (DE65)

See realistic solar installation costs, savings and payback for DE65 (South Derbyshire) 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
10.7 years
After this, it's pure profit
Upfront Cost
£8,139
What you pay to get started
Annual Benefit
£762
What you save every year
Profit Over 25 Years
£10,904
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 East Midlands, the current unit rate is 25.10p/kWh with a 53.60p/day standing charge. Your postcode’s south-facing sunshine yield is 950 kWh/kW — 18 below the regional median (968).

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 950 kWh per year on a south-facing roof. We value self-used electricity at 25.1p and exported surplus at a baseline 10p via SEG. Use the calculator above for your exact tariff.

Unit rate
25.1p/kWh
Standing charge
53.6p/day
Sunshine yield (south)
950 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: £762, Upfront: £8,139, Break-even: 10.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1900 kWh 760 kWh 1140 kWh £191 £114 £305 £3,256 10.7 yrs £2,838
3 kW 2849 kWh 1140 kWh 1710 kWh £286 £171 £457 £4,883 10.7 yrs £4,257
4 kW 3799 kWh 1520 kWh 2279 kWh £381 £228 £609 £6,511 10.7 yrs £5,676
5 kW 4749 kWh 1900 kWh 2849 kWh £477 £285 £762 £8,139 10.7 yrs £7,095
6 kW 5699 kWh 2279 kWh 3419 kWh £572 £342 £914 £9,767 10.7 yrs £8,514
7 kW 6648 kWh 2659 kWh 3989 kWh £667 £399 £1,066 £11,394 10.7 yrs £9,933
8 kW 7598 kWh 3039 kWh 4559 kWh £763 £456 £1,219 £13,022 10.7 yrs £11,353

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: £905, Upfront: £10,239, Break-even: 11.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1900 kWh 1140 kWh 760 kWh £286 £76 £362 £5,356 14.8 yrs £1,885
3 kW 2849 kWh 1710 kWh 1140 kWh £429 £114 £543 £6,983 12.9 yrs £3,878
4 kW 3799 kWh 2279 kWh 1520 kWh £572 £152 £724 £8,611 11.9 yrs £5,871
5 kW 4749 kWh 2849 kWh 1900 kWh £715 £190 £905 £10,239 11.3 yrs £7,864
6 kW 5699 kWh 3419 kWh 2279 kWh £858 £228 £1,086 £11,867 10.9 yrs £9,856
7 kW 6648 kWh 3989 kWh 2659 kWh £1,001 £266 £1,267 £13,494 10.6 yrs £11,849
8 kW 7598 kWh 4559 kWh 3039 kWh £1,144 £304 £1,448 £15,122 10.4 yrs £13,842

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: £977, Upfront: £11,639, Break-even: 11.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1900 kWh 1330 kWh 570 kWh £334 £57 £391 £6,756 17.3 yrs £1,059
3 kW 2849 kWh 1994 kWh 855 kWh £501 £85 £586 £8,383 14.3 yrs £3,339
4 kW 3799 kWh 2659 kWh 1140 kWh £667 £114 £781 £10,011 12.8 yrs £5,618
5 kW 4749 kWh 3324 kWh 1425 kWh £834 £142 £977 £11,639 11.9 yrs £7,898
6 kW 5699 kWh 3989 kWh 1710 kWh £1,001 £171 £1,172 £13,267 11.3 yrs £10,177
7 kW 6648 kWh 4654 kWh 1994 kWh £1,168 £199 £1,368 £14,894 10.9 yrs £12,457
8 kW 7598 kWh 5319 kWh 2279 kWh £1,335 £228 £1,563 £16,522 10.6 yrs £14,736

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: £998, Upfront: £13,389, Break-even: 13.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1900 kWh 1387 kWh 513 kWh £348 £51 £399 £8,506 21.3 yrs £-519
3 kW 2849 kWh 2080 kWh 769 kWh £522 £77 £599 £10,133 16.9 yrs £1,847
4 kW 3799 kWh 2773 kWh 1026 kWh £696 £103 £799 £11,761 14.7 yrs £4,212
5 kW 4749 kWh 3467 kWh 1282 kWh £870 £128 £998 £13,389 13.4 yrs £6,578
6 kW 5699 kWh 4160 kWh 1539 kWh £1,044 £154 £1,198 £15,017 12.5 yrs £8,944
7 kW 6648 kWh 4853 kWh 1795 kWh £1,218 £180 £1,398 £16,644 11.9 yrs £11,309
8 kW 7598 kWh 5547 kWh 2051 kWh £1,392 £205 £1,597 £18,272 11.4 yrs £13,675

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: £1,013, Upfront: £15,139, Break-even: 14.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1900 kWh 1425 kWh 475 kWh £358 £47 £405 £10,256 25.3 yrs £-2,154
3 kW 2849 kWh 2137 kWh 712 kWh £536 £71 £608 £11,883 19.6 yrs £269
4 kW 3799 kWh 2849 kWh 950 kWh £715 £95 £810 £13,511 16.7 yrs £2,692
5 kW 4749 kWh 3562 kWh 1187 kWh £894 £119 £1,013 £15,139 14.9 yrs £5,115
6 kW 5699 kWh 4274 kWh 1425 kWh £1,073 £142 £1,215 £16,767 13.8 yrs £7,538
7 kW 6648 kWh 4986 kWh 1662 kWh £1,252 £166 £1,418 £18,394 13.0 yrs £9,961
8 kW 7598 kWh 5699 kWh 1900 kWh £1,430 £190 £1,620 £20,022 12.4 yrs £12,384

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: £1,027, Upfront: £17,589, Break-even: 17.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1900 kWh 1463 kWh 437 kWh £367 £44 £411 £12,706 30.9 yrs £-4,489
3 kW 2849 kWh 2194 kWh 655 kWh £551 £66 £616 £14,333 23.3 yrs £-2,009
4 kW 3799 kWh 2925 kWh 874 kWh £734 £87 £822 £15,961 19.4 yrs £471
5 kW 4749 kWh 3657 kWh 1092 kWh £918 £109 £1,027 £17,589 17.1 yrs £2,952
6 kW 5699 kWh 4388 kWh 1311 kWh £1,101 £131 £1,232 £19,217 15.6 yrs £5,432
7 kW 6648 kWh 5119 kWh 1529 kWh £1,285 £153 £1,438 £20,844 14.5 yrs £7,912
8 kW 7598 kWh 5851 kWh 1748 kWh £1,468 £175 £1,643 £22,472 13.7 yrs £10,393

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 South Derbyshire

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 DE65

Figures below are tailored to DE65 — click through for full league tables.

Big-Roof Britain Rank #904 of 2182
5.2 kWp (UK avg 5.1 kWp)
~11 panels (≈430 W)
Solar Payback Index Rank #1669 of 2996
10.7 years (UK avg 10.8 years)
~£762 /yr • £8,139 upfront
Standing-Charge Drag Rank #1551 of 2996
25.7% (UK avg 26.6%) drag on savings
£196 fixed • ~£762 /yr value
Aspect Penalty View ranking →
East −21.1% West −19.7%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in DE65

Monthly generation per kilowatt of solar panels

kWh 35 Jan 50 Feb 82 Mar 108 Apr 117 May 114 Jun 116 Jul 106 Aug 88 Sep 61 Oct 41 Nov 32 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 49.1% of an average month (Dec–Feb)

Best / worst month: May / Dec

These figures show output per kilowatt (kW) of panels installed. In winter, a 1 kW system here produces about 39 kWh per month; the average month produces around 79 kWh. So a typical 4 kW home system would generate roughly 155 kWh in winter, or 317 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
25.10p/kWh
Daily Fixed Charge
53.60p/day
Local Sunshine
950kWh/kW
A 1 kW system generates ~950 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: 81% • Flats: 9% • Bungalows: 10% Based on 6,474 properties

Coverage

South Derbyshire (100%)

Areas Covered

Hilton, Hatton, Willington and Findern, Etwall, Repton

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 East Midlands

DE13 (East Staffordshire)
≈6.3 km away
Local sunshine: ~943 kWh/kWp · -1% vs DE65
DE14 (East Staffordshire)
≈6.6 km away
Local sunshine: ~938 kWh/kWp · -1% vs DE65
DE15 (East Staffordshire)
≈7.7 km away
Local sunshine: ~937 kWh/kWp · -1% vs DE65
DE23 (Derby)
≈9.3 km away
Local sunshine: ~953 kWh/kWp · +0% vs DE65
DE3 (Derby)
≈9.7 km away
Local sunshine: ~948 kWh/kWp · -0% vs DE65
DE22 (Derby)
≈11.2 km away
Local sunshine: ~946 kWh/kWp · -0% vs DE65

Similar sunshine across the UK

SA32 (Carmarthenshire)
~950 kWh/kWp · +0% vs DE65
SA37 (Pembrokeshire)
~950 kWh/kWp · -0% vs DE65
CA21 (Cumberland)
~950 kWh/kWp · +0% vs DE65