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Solar panel cost in Havant (PO9)

See realistic solar installation costs, savings and payback for PO9 (Havant) 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
9.0 years
After this, it's pure profit
Upfront Cost
£8,139
What you pay to get started
Annual Benefit
£908
What you save every year
Profit Over 25 Years
£14,560
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 1096 kWh/kW — 95 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 1096 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)
1096 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: £908, Upfront: £8,139, Break-even: 9.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2192 kWh 877 kWh 1315 kWh £232 £132 £363 £3,256 9.0 yrs £4,008
3 kW 3288 kWh 1315 kWh 1973 kWh £347 £197 £545 £4,883 9.0 yrs £6,012
4 kW 4384 kWh 1754 kWh 2630 kWh £463 £263 £726 £6,511 9.0 yrs £8,016
5 kW 5480 kWh 2192 kWh 3288 kWh £579 £329 £908 £8,139 9.0 yrs £10,020
6 kW 6576 kWh 2630 kWh 3946 kWh £695 £395 £1,090 £9,767 9.0 yrs £12,024
7 kW 7672 kWh 3069 kWh 4603 kWh £811 £460 £1,271 £11,394 9.0 yrs £14,028
8 kW 8768 kWh 3507 kWh 5261 kWh £927 £526 £1,453 £13,022 9.0 yrs £16,032

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: £1,088, Upfront: £10,239, Break-even: 9.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2192 kWh 1315 kWh 877 kWh £347 £88 £435 £5,356 12.3 yrs £3,348
3 kW 3288 kWh 1973 kWh 1315 kWh £521 £132 £653 £6,983 10.7 yrs £6,072
4 kW 4384 kWh 2630 kWh 1754 kWh £695 £175 £870 £8,611 9.9 yrs £8,795
5 kW 5480 kWh 3288 kWh 2192 kWh £869 £219 £1,088 £10,239 9.4 yrs £11,519
6 kW 6576 kWh 3946 kWh 2630 kWh £1,042 £263 £1,305 £11,867 9.1 yrs £14,243
7 kW 7672 kWh 4603 kWh 3069 kWh £1,216 £307 £1,523 £13,494 8.9 yrs £16,967
8 kW 8768 kWh 5261 kWh 3507 kWh £1,390 £351 £1,741 £15,122 8.7 yrs £19,691

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: £1,178, Upfront: £11,639, Break-even: 9.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2192 kWh 1534 kWh 658 kWh £405 £66 £471 £6,756 14.3 yrs £2,668
3 kW 3288 kWh 2302 kWh 986 kWh £608 £99 £707 £8,383 11.9 yrs £5,751
4 kW 4384 kWh 3069 kWh 1315 kWh £811 £132 £942 £10,011 10.6 yrs £8,835
5 kW 5480 kWh 3836 kWh 1644 kWh £1,013 £164 £1,178 £11,639 9.9 yrs £11,919
6 kW 6576 kWh 4603 kWh 1973 kWh £1,216 £197 £1,413 £13,267 9.4 yrs £15,003
7 kW 7672 kWh 5370 kWh 2302 kWh £1,419 £230 £1,649 £14,894 9.0 yrs £18,086
8 kW 8768 kWh 6138 kWh 2630 kWh £1,622 £263 £1,885 £16,522 8.8 yrs £21,170

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: £1,205, Upfront: £13,389, Break-even: 11.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2192 kWh 1600 kWh 592 kWh £423 £59 £482 £8,506 17.6 yrs £1,133
3 kW 3288 kWh 2400 kWh 888 kWh £634 £89 £723 £10,133 14.0 yrs £4,325
4 kW 4384 kWh 3200 kWh 1184 kWh £846 £118 £964 £11,761 12.2 yrs £7,517
5 kW 5480 kWh 4000 kWh 1480 kWh £1,057 £148 £1,205 £13,389 11.1 yrs £10,709
6 kW 6576 kWh 4801 kWh 1776 kWh £1,268 £178 £1,446 £15,017 10.4 yrs £13,900
7 kW 7672 kWh 5601 kWh 2071 kWh £1,480 £207 £1,687 £16,644 9.9 yrs £17,092
8 kW 8768 kWh 6401 kWh 2367 kWh £1,691 £237 £1,928 £18,272 9.5 yrs £20,284

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: £1,223, Upfront: £15,139, 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 2192 kWh 1644 kWh 548 kWh £434 £55 £489 £10,256 21.0 yrs £-473
3 kW 3288 kWh 2466 kWh 822 kWh £652 £82 £734 £11,883 16.2 yrs £2,791
4 kW 4384 kWh 3288 kWh 1096 kWh £869 £110 £978 £13,511 13.8 yrs £6,055
5 kW 5480 kWh 4110 kWh 1370 kWh £1,086 £137 £1,223 £15,139 12.4 yrs £9,319
6 kW 6576 kWh 4932 kWh 1644 kWh £1,303 £164 £1,467 £16,767 11.4 yrs £12,582
7 kW 7672 kWh 5754 kWh 1918 kWh £1,520 £192 £1,712 £18,394 10.7 yrs £15,846
8 kW 8768 kWh 6576 kWh 2192 kWh £1,737 £219 £1,957 £20,022 10.2 yrs £19,110

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: £1,241, Upfront: £17,589, Break-even: 14.2 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2192 kWh 1688 kWh 504 kWh £446 £50 £496 £12,706 25.6 yrs £-2,779
3 kW 3288 kWh 2532 kWh 756 kWh £669 £76 £745 £14,333 19.3 yrs £557
4 kW 4384 kWh 3376 kWh 1008 kWh £892 £101 £993 £15,961 16.1 yrs £3,893
5 kW 5480 kWh 4220 kWh 1260 kWh £1,115 £126 £1,241 £17,589 14.2 yrs £7,229
6 kW 6576 kWh 5064 kWh 1512 kWh £1,338 £151 £1,489 £19,217 12.9 yrs £10,564
7 kW 7672 kWh 5907 kWh 1765 kWh £1,561 £176 £1,737 £20,844 12.0 yrs £13,900
8 kW 8768 kWh 6751 kWh 2017 kWh £1,784 £202 £1,985 £22,472 11.3 yrs £17,236

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 Havant

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 PO9

Figures below are tailored to PO9 — click through for full league tables.

Big-Roof Britain Rank #1596 of 2182
4.6 kWp (UK avg 5.1 kWp)
~10 panels (≈430 W)
Solar Payback Index Rank #115 of 2996
9.0 years (UK avg 10.8 years)
~£908 /yr • £8,139 upfront
Standing-Charge Drag Rank #522 of 2996
19.9% (UK avg 26.6%) drag on savings
£181 fixed • ~£908 /yr value
Aspect Penalty View ranking →
East −21.2% West −21.6%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in PO9

Monthly generation per kilowatt of solar panels

kWh 42 Jan 58 Feb 94 Mar 124 Apr 131 May 134 Jun 134 Jul 118 Aug 101 Sep 71 Oct 50 Nov 38 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 50.1% 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 46 kWh per month; the average month produces around 91 kWh. So a typical 4 kW home system would generate roughly 183 kWh in winter, or 365 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
26.42p/kWh
Daily Fixed Charge
49.70p/day
Local Sunshine
1096kWh/kW
A 1 kW system generates ~1096 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: 69% • Flats: 25% • Bungalows: 4% Based on 12,896 properties

Coverage

Havant (93%)|East Hampshire (6%)|Chichester (1%)

Areas Covered

Havant St Faith's, Leigh Park Central & West Leigh, Bedhampton, Leigh Park Hermitage, Rowlands Castle, Westbourne, Emsworth

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

PO10 (Havant)
≈3.4 km away
Local sunshine: ~1,133 kWh/kWp · +3% vs PO9
PO7 (Havant)
≈5.2 km away
Local sunshine: ~1,086 kWh/kWp · -1% vs PO9
PO8 (East Hampshire)
≈5.7 km away
Local sunshine: ~1,058 kWh/kWp · -4% vs PO9
PO6 (Portsmouth)
≈6.4 km away
Local sunshine: ~1,090 kWh/kWp · -1% vs PO9
PO3 (Portsmouth)
≈7.6 km away
Local sunshine: ~1,096 kWh/kWp · -0% vs PO9
PO11 (Havant)
≈7.8 km away
Local sunshine: ~1,096 kWh/kWp · +0% vs PO9

Similar sunshine across the UK

TR24 (Isles of Scilly)
~1,096 kWh/kWp · +0% vs PO9
TR12 (Cornwall)
~1,097 kWh/kWp · +0% vs PO9
CT12 (Thanet)
~1,094 kWh/kWp · -0% vs PO9