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Solar panel cost in Winchester (SO24)

See realistic solar installation costs, savings and payback for SO24 (Winchester) 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
13.1 years
After this, it's pure profit
Upfront Cost
£12,207
What you pay to get started
Annual Benefit
£934
What you save every year
Profit Over 25 Years
£11,153
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: Bigger systems don’t shorten payback—cost and savings rise together per kW.
  • 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

Costs: Battery prices are typically £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 23.36p/kWh with a 49.69p/day standing charge. Your postcode’s south-facing sunshine yield is 1015 kWh/kW — 14 above the regional median (1001).

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 1015 kWh per year on a south-facing roof. We value self-used electricity at 23.4p and exported surplus at a baseline 10p via SEG. Use the calculator above for your exact tariff.

Unit rate
23.4p/kWh
Standing charge
49.7p/day
Sunshine yield (south)
1015 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: £779, Upfront: £10,173, Break-even: 13.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2030 kWh 812 kWh 1218 kWh £190 £122 £311 £4,069 13.1 yrs £2,160
3 kW 3045 kWh 1218 kWh 1827 kWh £285 £183 £467 £6,104 13.1 yrs £3,240
4 kW 4060 kWh 1624 kWh 2436 kWh £379 £244 £623 £8,138 13.1 yrs £4,320
5 kW 5075 kWh 2030 kWh 3045 kWh £474 £304 £779 £10,173 13.1 yrs £5,401
6 kW 6090 kWh 2436 kWh 3654 kWh £569 £365 £934 £12,207 13.1 yrs £6,481
7 kW 7105 kWh 2842 kWh 4263 kWh £664 £426 £1,090 £14,242 13.1 yrs £7,561
8 kW 8119 kWh 3248 kWh 4872 kWh £759 £487 £1,246 £16,276 13.1 yrs £8,641

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

3 kWh battery 5 kW example → Annual benefit: £914, Upfront: £12,273, 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 2030 kWh 1218 kWh 812 kWh £285 £81 £366 £6,169 16.9 yrs £1,145
3 kW 3045 kWh 1827 kWh 1218 kWh £427 £122 £549 £8,204 15.0 yrs £2,767
4 kW 4060 kWh 2436 kWh 1624 kWh £569 £162 £731 £10,238 14.0 yrs £4,390
5 kW 5075 kWh 3045 kWh 2030 kWh £711 £203 £914 £12,273 13.4 yrs £6,012
6 kW 6090 kWh 3654 kWh 2436 kWh £854 £244 £1,097 £14,307 13.0 yrs £7,635
7 kW 7105 kWh 4263 kWh 2842 kWh £996 £284 £1,280 £16,342 12.8 yrs £9,257
8 kW 8119 kWh 4872 kWh 3248 kWh £1,138 £325 £1,463 £18,376 12.6 yrs £10,880

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

5 kWh battery 5 kW example → Annual benefit: £982, Upfront: £13,673, 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 2030 kWh 1421 kWh 609 kWh £332 £61 £393 £7,569 19.3 yrs £287
3 kW 3045 kWh 2131 kWh 913 kWh £498 £91 £589 £9,604 16.3 yrs £2,181
4 kW 4060 kWh 2842 kWh 1218 kWh £664 £122 £786 £11,638 14.8 yrs £4,075
5 kW 5075 kWh 3552 kWh 1522 kWh £830 £152 £982 £13,673 13.9 yrs £5,968
6 kW 6090 kWh 4263 kWh 1827 kWh £996 £183 £1,178 £15,707 13.3 yrs £7,862
7 kW 7105 kWh 4973 kWh 2131 kWh £1,162 £213 £1,375 £17,742 12.9 yrs £9,756
8 kW 8119 kWh 5684 kWh 2436 kWh £1,328 £244 £1,571 £19,776 12.6 yrs £11,649

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

7.5 kWh battery 5 kW example → Annual benefit: £1,002, Upfront: £15,423, 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 2030 kWh 1482 kWh 548 kWh £346 £55 £401 £9,319 23.2 yrs £-1,300
3 kW 3045 kWh 2223 kWh 822 kWh £519 £82 £601 £11,354 18.9 yrs £675
4 kW 4060 kWh 2964 kWh 1096 kWh £692 £110 £802 £13,388 16.7 yrs £2,650
5 kW 5075 kWh 3704 kWh 1370 kWh £865 £137 £1,002 £15,423 15.4 yrs £4,625
6 kW 6090 kWh 4445 kWh 1644 kWh £1,038 £164 £1,203 £17,457 14.5 yrs £6,600
7 kW 7105 kWh 5186 kWh 1918 kWh £1,212 £192 £1,403 £19,492 13.9 yrs £8,575
8 kW 8119 kWh 5927 kWh 2192 kWh £1,385 £219 £1,604 £21,526 13.4 yrs £10,550

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

10 kWh battery 5 kW example → Annual benefit: £1,016, Upfront: £17,173, Break-even: 16.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2030 kWh 1522 kWh 507 kWh £356 £51 £406 £11,069 27.2 yrs £-2,941
3 kW 3045 kWh 2284 kWh 761 kWh £533 £76 £610 £13,104 21.5 yrs £-912
4 kW 4060 kWh 3045 kWh 1015 kWh £711 £101 £813 £15,138 18.6 yrs £1,117
5 kW 5075 kWh 3806 kWh 1269 kWh £889 £127 £1,016 £17,173 16.9 yrs £3,146
6 kW 6090 kWh 4567 kWh 1522 kWh £1,067 £152 £1,219 £19,207 15.8 yrs £5,176
7 kW 7105 kWh 5328 kWh 1776 kWh £1,245 £178 £1,422 £21,242 14.9 yrs £7,205
8 kW 8119 kWh 6090 kWh 2030 kWh £1,423 £203 £1,626 £23,276 14.3 yrs £9,234

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

13.5 kWh battery 5 kW example → Annual benefit: £1,030, Upfront: £19,623, Break-even: 19.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2030 kWh 1563 kWh 467 kWh £365 £47 £412 £13,519 32.8 yrs £-5,283
3 kW 3045 kWh 2344 kWh 700 kWh £548 £70 £618 £15,554 25.2 yrs £-3,199
4 kW 4060 kWh 3126 kWh 934 kWh £730 £93 £824 £17,588 21.4 yrs £-1,116
5 kW 5075 kWh 3907 kWh 1167 kWh £913 £117 £1,030 £19,623 19.1 yrs £968
6 kW 6090 kWh 4689 kWh 1401 kWh £1,095 £140 £1,235 £21,657 17.5 yrs £3,051
7 kW 7105 kWh 5470 kWh 1634 kWh £1,278 £163 £1,441 £23,692 16.4 yrs £5,135
8 kW 8119 kWh 6252 kWh 1867 kWh £1,460 £187 £1,647 £25,726 15.6 yrs £7,218

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, 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.

Insights for SO24

Figures below are tailored to SO24 — click through for full league tables.

Big-Roof Britain Rank #130 of 2182
6.4 kWp (UK avg 5.1 kWp)
~13 panels (≈430 W)
Solar Payback Index Rank #580 of 2997
11.7 years (UK avg 12.6 years)
~£1,043 /yr • £12,207 upfront
Standing-Charge Drag Rank #104 of 2997
16.0% (UK avg 24.6%) drag on savings
£167 fixed • ~£1,043 /yr value
Aspect Penalty View ranking →
East −20.8% West −19.8%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in SO24

Monthly generation per kilowatt of solar panels

kWh 40 Jan 52 Feb 88 Mar 116 Apr 122 May 124 Jun 122 Jul 109 Aug 95 Sep 67 Oct 46 Nov 35 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 49.9% of an average month (Dec–Feb)

Best / worst month: Jun / 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 85 kWh. So a typical 4 kW home system would generate roughly 169 kWh in winter, or 338 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
23.36p/kWh
Daily Fixed Charge
49.69p/day
Local Sunshine
1015kWh/kW
A 1 kW system generates ~1015 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: 69% • Flats: 10% • Bungalows: 20% Based on 3,023 properties

Coverage

Winchester (85%)|East Hampshire (13%)|Basingstoke and Deane (2%)

Areas Covered

Alresford and Itchen Valley, Upper Meon Valley, Ropley, Hawkley & Hangers, Oakley & The Candovers, Bentworth & Froyle, Four Marks & Medstead

Data Sources & Assumptions

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

Electricity rates: Ofgem price cap, Q1 2026

Installation costs: MCS certified installer data, March 2025

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

SO25 (Winchester)
≈9.7 km away
Local sunshine: ~1,017 kWh/kWp · +0% vs SO24
SO23 (Winchester)
≈10.2 km away
Local sunshine: ~1,017 kWh/kWp · +0% vs SO24
SO21 (Winchester)
≈11.0 km away
Local sunshine: ~1,017 kWh/kWp · +0% vs SO24
SO22 (Winchester)
≈12.2 km away
Local sunshine: ~1,016 kWh/kWp · +0% vs SO24
GU34 (East Hampshire)
≈14.5 km away
Local sunshine: ~1,010 kWh/kWp · -1% vs SO24
SO32 (Winchester)
≈16.0 km away
Local sunshine: ~1,032 kWh/kWp · +2% vs SO24

Similar sunshine across the UK

DA4 (Sevenoaks)
~1,015 kWh/kWp · +0% vs SO24
EX4 (Exeter)
~1,015 kWh/kWp · -0% vs SO24
RH3 (Mole Valley)
~1,015 kWh/kWp · +0% vs SO24