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Solar panel cost in Fareham (SO31)

See realistic solar installation costs, savings and payback for SO31 (Fareham) 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
9.1 years
After this, it's pure profit
Upfront Cost
£8,139
What you pay to get started
Annual Benefit
£891
What you save every year
Profit Over 25 Years
£14,144
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 Southern, the current unit rate is 26.42p/kWh with a 49.70p/day standing charge. Your postcode’s south-facing sunshine yield is 1076 kWh/kW — 75 above the regional median (1001).

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 1076 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
49.7p/day
Sunshine yield (south)
1076 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: £891, Upfront: £8,139, Break-even: 9.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2152 kWh 861 kWh 1291 kWh £227 £129 £357 £3,256 9.1 yrs £3,875
3 kW 3228 kWh 1291 kWh 1937 kWh £341 £194 £535 £4,883 9.1 yrs £5,813
4 kW 4304 kWh 1722 kWh 2582 kWh £455 £258 £713 £6,511 9.1 yrs £7,750
5 kW 5380 kWh 2152 kWh 3228 kWh £569 £323 £891 £8,139 9.1 yrs £9,688
6 kW 6456 kWh 2582 kWh 3873 kWh £682 £387 £1,070 £9,767 9.1 yrs £11,625
7 kW 7532 kWh 3013 kWh 4519 kWh £796 £452 £1,248 £11,394 9.1 yrs £13,563
8 kW 8608 kWh 3443 kWh 5165 kWh £910 £516 £1,426 £13,022 9.1 yrs £15,500

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: £1,068, Upfront: £10,239, Break-even: 9.6 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2152 kWh 1291 kWh 861 kWh £341 £86 £427 £5,356 12.5 yrs £3,188
3 kW 3228 kWh 1937 kWh 1291 kWh £512 £129 £641 £6,983 10.9 yrs £5,833
4 kW 4304 kWh 2582 kWh 1722 kWh £682 £172 £854 £8,611 10.1 yrs £8,477
5 kW 5380 kWh 3228 kWh 2152 kWh £853 £215 £1,068 £10,239 9.6 yrs £11,121
6 kW 6456 kWh 3873 kWh 2582 kWh £1,023 £258 £1,282 £11,867 9.3 yrs £13,765
7 kW 7532 kWh 4519 kWh 3013 kWh £1,194 £301 £1,495 £13,494 9.0 yrs £16,409
8 kW 8608 kWh 5165 kWh 3443 kWh £1,364 £344 £1,709 £15,122 8.8 yrs £19,054

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: £1,156, Upfront: £11,639, Break-even: 10.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2152 kWh 1506 kWh 646 kWh £398 £65 £463 £6,756 14.6 yrs £2,495
3 kW 3228 kWh 2259 kWh 968 kWh £597 £97 £694 £8,383 12.1 yrs £5,493
4 kW 4304 kWh 3013 kWh 1291 kWh £796 £129 £925 £10,011 10.8 yrs £8,490
5 kW 5380 kWh 3766 kWh 1614 kWh £995 £161 £1,156 £11,639 10.1 yrs £11,488
6 kW 6456 kWh 4519 kWh 1937 kWh £1,194 £194 £1,388 £13,267 9.6 yrs £14,485
7 kW 7532 kWh 5272 kWh 2259 kWh £1,393 £226 £1,619 £14,894 9.2 yrs £17,483
8 kW 8608 kWh 6025 kWh 2582 kWh £1,592 £258 £1,850 £16,522 8.9 yrs £20,480

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: £1,183, Upfront: £13,389, 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 2152 kWh 1571 kWh 581 kWh £415 £58 £473 £8,506 18.0 yrs £957
3 kW 3228 kWh 2356 kWh 872 kWh £623 £87 £710 £10,133 14.3 yrs £4,061
4 kW 4304 kWh 3142 kWh 1162 kWh £830 £116 £946 £11,761 12.4 yrs £7,164
5 kW 5380 kWh 3927 kWh 1453 kWh £1,038 £145 £1,183 £13,389 11.3 yrs £10,268
6 kW 6456 kWh 4713 kWh 1743 kWh £1,245 £174 £1,419 £15,017 10.6 yrs £13,371
7 kW 7532 kWh 5498 kWh 2034 kWh £1,453 £203 £1,656 £16,644 10.1 yrs £16,475
8 kW 8608 kWh 6284 kWh 2324 kWh £1,660 £232 £1,893 £18,272 9.7 yrs £19,578

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: £1,200, Upfront: £15,139, Break-even: 12.6 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2152 kWh 1614 kWh 538 kWh £426 £54 £480 £10,256 21.4 yrs £-652
3 kW 3228 kWh 2421 kWh 807 kWh £640 £81 £720 £11,883 16.5 yrs £2,523
4 kW 4304 kWh 3228 kWh 1076 kWh £853 £108 £960 £13,511 14.1 yrs £5,697
5 kW 5380 kWh 4035 kWh 1345 kWh £1,066 £134 £1,200 £15,139 12.6 yrs £8,871
6 kW 6456 kWh 4842 kWh 1614 kWh £1,279 £161 £1,441 £16,767 11.6 yrs £12,045
7 kW 7532 kWh 5649 kWh 1883 kWh £1,492 £188 £1,681 £18,394 10.9 yrs £15,219
8 kW 8608 kWh 6456 kWh 2152 kWh £1,706 £215 £1,921 £20,022 10.4 yrs £18,394

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: £1,218, Upfront: £17,589, Break-even: 14.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2152 kWh 1657 kWh 495 kWh £438 £49 £487 £12,706 26.1 yrs £-2,960
3 kW 3228 kWh 2485 kWh 742 kWh £657 £74 £731 £14,333 19.6 yrs £285
4 kW 4304 kWh 3314 kWh 990 kWh £876 £99 £975 £15,961 16.4 yrs £3,529
5 kW 5380 kWh 4142 kWh 1237 kWh £1,094 £124 £1,218 £17,589 14.4 yrs £6,774
6 kW 6456 kWh 4971 kWh 1485 kWh £1,313 £148 £1,462 £19,217 13.1 yrs £10,019
7 kW 7532 kWh 5799 kWh 1732 kWh £1,532 £173 £1,705 £20,844 12.2 yrs £13,264
8 kW 8608 kWh 6628 kWh 1980 kWh £1,751 £198 £1,949 £22,472 11.5 yrs £16,509

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 Fareham

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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Check what MCS certification means

Understand DNO, G98 and G99 export limits

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Insights for SO31

Figures below are tailored to SO31 — click through for full league tables.

Big-Roof Britain Rank #929 of 2182
5.1 kWp (UK avg 5.1 kWp)
~11 panels (≈430 W)
Solar Payback Index Rank #149 of 2996
9.1 years (UK avg 10.8 years)
~£891 /yr • £8,139 upfront
Standing-Charge Drag Rank #631 of 2996
20.3% (UK avg 26.6%) drag on savings
£181 fixed • ~£891 /yr value
Aspect Penalty View ranking →
East −21.1% West −21.3%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in SO31

Monthly generation per kilowatt of solar panels

kWh 41 Jan 56 Feb 93 Mar 122 Apr 128 May 132 Jun 131 Jul 117 Aug 100 Sep 71 Oct 49 Nov 37 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 50.0% 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 45 kWh per month; the average month produces around 90 kWh. So a typical 4 kW home system would generate roughly 179 kWh in winter, or 359 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
26.42p/kWh
Daily Fixed Charge
49.70p/day
Local Sunshine
1076kWh/kW
A 1 kW system generates ~1076 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: 68% • Flats: 20% • Bungalows: 9% Based on 12,225 properties

Coverage

Fareham (67%)|Eastleigh (33%)

Areas Covered

Park Gate, Hamble & Netley, Bursledon & Hound North, Hook-with-Warsash, Locks Heath, Sarisbury & Whiteley, Titchfield Common, Southwick and Wickham + 1 more

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 Southern

SO3 (Eastleigh)
≈4.2 km away
Local sunshine: ~1,032 kWh/kWp · -4% vs SO31
PO15 (Fareham)
≈5.0 km away
Local sunshine: ~1,078 kWh/kWp · +0% vs SO31
PO14 (Fareham)
≈6.1 km away
Local sunshine: ~1,078 kWh/kWp · +0% vs SO31
SO30 (Eastleigh)
≈6.1 km away
Local sunshine: ~1,043 kWh/kWp · -3% vs SO31
SO19 (Southampton)
≈6.3 km away
Local sunshine: ~1,063 kWh/kWp · -1% vs SO31
PO17 (Winchester)
≈7.2 km away
Local sunshine: ~1,078 kWh/kWp · +0% vs SO31

Similar sunshine across the UK

PL5 (Plymouth)
~1,076 kWh/kWp · -0% vs SO31
TN18 (Tunbridge Wells)
~1,076 kWh/kWp · +0% vs SO31
PL2 (Plymouth)
~1,076 kWh/kWp · -0% vs SO31