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Solar panel cost in Milton Keynes (MK9)

See realistic solar installation costs, savings and payback for MK9 (Milton Keynes) 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
11.6 years
After this, it's pure profit
Upfront Cost
£5,481
What you pay to get started
Annual Benefit
£474
What you save every year
Profit Over 25 Years
£6,374
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 985 kWh/kW — 17 above the regional median (968).

Read the full story

A typical roof here lands around 3.0 kW, with most eligible homes comfortably fitting within 3–6 kW. Each kilowatt of panels produces roughly 985 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)
985 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: £790, Upfront: £9,134, Break-even: 11.6 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1971 kWh 788 kWh 1182 kWh £198 £118 £316 £3,654 11.6 yrs £2,669
3 kW 2956 kWh 1182 kWh 1774 kWh £297 £177 £474 £5,481 11.6 yrs £4,003
4 kW 3942 kWh 1577 kWh 2365 kWh £396 £236 £632 £7,307 11.6 yrs £5,337
5 kW 4927 kWh 1971 kWh 2956 kWh £495 £296 £790 £9,134 11.6 yrs £6,671
6 kW 5912 kWh 2365 kWh 3547 kWh £594 £355 £948 £10,961 11.6 yrs £8,006
7 kW 6898 kWh 2759 kWh 4139 kWh £693 £414 £1,106 £12,788 11.6 yrs £9,340
8 kW 7883 kWh 3153 kWh 4730 kWh £791 £473 £1,264 £14,615 11.6 yrs £10,674

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: £939, Upfront: £11,234, Break-even: 12.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1971 kWh 1182 kWh 788 kWh £297 £79 £376 £5,754 15.3 yrs £1,759
3 kW 2956 kWh 1774 kWh 1182 kWh £445 £118 £563 £7,581 13.5 yrs £3,688
4 kW 3942 kWh 2365 kWh 1577 kWh £594 £158 £751 £9,407 12.5 yrs £5,618
5 kW 4927 kWh 2956 kWh 1971 kWh £742 £197 £939 £11,234 12.0 yrs £7,547
6 kW 5912 kWh 3547 kWh 2365 kWh £890 £236 £1,127 £13,061 11.6 yrs £9,477
7 kW 6898 kWh 4139 kWh 2759 kWh £1,039 £276 £1,315 £14,888 11.3 yrs £11,406
8 kW 7883 kWh 4730 kWh 3153 kWh £1,187 £315 £1,503 £16,715 11.1 yrs £13,335

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: £1,013, Upfront: £12,634, Break-even: 12.5 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1971 kWh 1380 kWh 591 kWh £346 £59 £405 £7,154 17.6 yrs £954
3 kW 2956 kWh 2069 kWh 887 kWh £519 £89 £608 £8,981 14.8 yrs £3,181
4 kW 3942 kWh 2759 kWh 1182 kWh £693 £118 £811 £10,807 13.3 yrs £5,408
5 kW 4927 kWh 3449 kWh 1478 kWh £866 £148 £1,013 £12,634 12.5 yrs £7,635
6 kW 5912 kWh 4139 kWh 1774 kWh £1,039 £177 £1,216 £14,461 11.9 yrs £9,862
7 kW 6898 kWh 4828 kWh 2069 kWh £1,212 £207 £1,419 £16,288 11.5 yrs £12,089
8 kW 7883 kWh 5518 kWh 2365 kWh £1,385 £236 £1,622 £18,115 11.2 yrs £14,316

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: £1,036, Upfront: £14,384, 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 1971 kWh 1439 kWh 532 kWh £361 £53 £414 £8,904 21.5 yrs £-617
3 kW 2956 kWh 2158 kWh 798 kWh £542 £80 £621 £10,731 17.3 yrs £1,699
4 kW 3942 kWh 2877 kWh 1064 kWh £722 £106 £829 £12,557 15.2 yrs £4,015
5 kW 4927 kWh 3597 kWh 1330 kWh £903 £133 £1,036 £14,384 13.9 yrs £6,331
6 kW 5912 kWh 4316 kWh 1596 kWh £1,083 £160 £1,243 £16,211 13.0 yrs £8,648
7 kW 6898 kWh 5035 kWh 1862 kWh £1,264 £186 £1,450 £18,038 12.4 yrs £10,964
8 kW 7883 kWh 5755 kWh 2128 kWh £1,444 £213 £1,657 £19,865 12.0 yrs £13,280

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: £1,051, Upfront: £16,134, Break-even: 15.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1971 kWh 1478 kWh 493 kWh £371 £49 £420 £10,654 25.3 yrs £-2,248
3 kW 2956 kWh 2217 kWh 739 kWh £556 £74 £630 £12,481 19.8 yrs £127
4 kW 3942 kWh 2956 kWh 985 kWh £742 £99 £841 £14,307 17.0 yrs £2,503
5 kW 4927 kWh 3695 kWh 1232 kWh £927 £123 £1,051 £16,134 15.4 yrs £4,879
6 kW 5912 kWh 4434 kWh 1478 kWh £1,113 £148 £1,261 £17,961 14.2 yrs £7,255
7 kW 6898 kWh 5173 kWh 1724 kWh £1,298 £172 £1,471 £19,788 13.5 yrs £9,631
8 kW 7883 kWh 5912 kWh 1971 kWh £1,484 £197 £1,681 £21,615 12.9 yrs £12,006

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: £1,066, Upfront: £18,584, Break-even: 17.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1971 kWh 1517 kWh 453 kWh £381 £45 £426 £13,104 30.7 yrs £-4,579
3 kW 2956 kWh 2276 kWh 680 kWh £571 £68 £639 £14,931 23.4 yrs £-2,144
4 kW 3942 kWh 3035 kWh 907 kWh £762 £91 £852 £16,757 19.7 yrs £291
5 kW 4927 kWh 3794 kWh 1133 kWh £952 £113 £1,066 £18,584 17.4 yrs £2,727
6 kW 5912 kWh 4552 kWh 1360 kWh £1,143 £136 £1,279 £20,411 16.0 yrs £5,162
7 kW 6898 kWh 5311 kWh 1586 kWh £1,333 £159 £1,492 £22,238 14.9 yrs £7,597
8 kW 7883 kWh 6070 kWh 1813 kWh £1,524 £181 £1,705 £24,065 14.1 yrs £10,033

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 Milton Keynes

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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Insights for MK9

Figures below are tailored to MK9 — click through for full league tables.

Solar Payback Index Rank #1408 of 2996
10.3 years (UK avg 10.8 years)
~£948 /yr • £9,767 upfront
Standing-Charge Drag Rank #679 of 2996
20.7% (UK avg 26.6%) drag on savings
£196 fixed • ~£948 /yr value
Aspect Penalty View ranking →
East −21.4% West −19.9%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in MK9

Monthly generation per kilowatt of solar panels

kWh 39 Jan 52 Feb 85 Mar 109 Apr 117 May 119 Jun 120 Jul 107 Aug 92 Sep 66 Oct 45 Nov 34 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 50.8% 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 42 kWh per month; the average month produces around 82 kWh. So a typical 4 kW home system would generate roughly 167 kWh in winter, or 328 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
25.10p/kWh
Daily Fixed Charge
53.60p/day
Local Sunshine
985kWh/kW
A 1 kW system generates ~985 kWh per year. A typical home uses ~2,700 kWh per year.
Typical System Size
3.0kW
For eligible homes in this area

⚠️ This area is predominantly flats. Many residents require freeholder approval for solar installations. System size shown reflects houses and bungalows only.

Local Property Data

Property Types

Houses: 5% • Flats: 93% • Bungalows: 0% Based on 5,008 properties

Coverage

Milton Keynes (100%)

Areas Covered

Central Milton Keynes, Monkston, Campbell Park & Old Woughton, Loughton & Shenley, Shenley Brook End, Broughton

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

MK6 (Milton Keynes)
≈1.5 km away
Local sunshine: ~985 kWh/kWp · -0% vs MK9
MK98 (Milton Keynes)
≈1.7 km away
Local sunshine: ~982 kWh/kWp · -0% vs MK9
MK14 (Milton Keynes)
≈2.0 km away
Local sunshine: ~985 kWh/kWp · -0% vs MK9
MK13 (Milton Keynes)
≈2.1 km away
Local sunshine: ~984 kWh/kWp · -0% vs MK9
MK5 (Milton Keynes)
≈2.8 km away
Local sunshine: ~990 kWh/kWp · +0% vs MK9
MK15 (Milton Keynes)
≈3.0 km away
Local sunshine: ~978 kWh/kWp · -1% vs MK9

Similar sunshine across the UK

GU17 (Hart)
~985 kWh/kWp · +0% vs MK9
GU95 (Surrey Heath)
~985 kWh/kWp · -0% vs MK9
GL54 (Cotswold)
~985 kWh/kWp · +0% vs MK9