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Solar panel cost in Havant (PO7)

See realistic solar installation costs, savings and payback for PO7 (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
£900
What you save every year
Profit Over 25 Years
£14,361
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 1086 kWh/kW — 85 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 1086 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)
1086 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: £900, 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 2173 kWh 869 kWh 1304 kWh £230 £130 £360 £3,256 9.0 yrs £3,944
3 kW 3259 kWh 1304 kWh 1956 kWh £344 £196 £540 £4,883 9.0 yrs £5,916
4 kW 4346 kWh 1738 kWh 2607 kWh £459 £261 £720 £6,511 9.0 yrs £7,889
5 kW 5432 kWh 2173 kWh 3259 kWh £574 £326 £900 £8,139 9.0 yrs £9,861
6 kW 6518 kWh 2607 kWh 3911 kWh £689 £391 £1,080 £9,767 9.0 yrs £11,833
7 kW 7605 kWh 3042 kWh 4563 kWh £804 £456 £1,260 £11,394 9.0 yrs £13,805
8 kW 8691 kWh 3476 kWh 5215 kWh £918 £521 £1,440 £13,022 9.0 yrs £15,777

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: £1,078, Upfront: £10,239, Break-even: 9.5 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2173 kWh 1304 kWh 869 kWh £344 £87 £431 £5,356 12.4 yrs £3,271
3 kW 3259 kWh 1956 kWh 1304 kWh £517 £130 £647 £6,983 10.8 yrs £5,957
4 kW 4346 kWh 2607 kWh 1738 kWh £689 £174 £863 £8,611 10.0 yrs £8,643
5 kW 5432 kWh 3259 kWh 2173 kWh £861 £217 £1,078 £10,239 9.5 yrs £11,328
6 kW 6518 kWh 3911 kWh 2607 kWh £1,033 £261 £1,294 £11,867 9.2 yrs £14,014
7 kW 7605 kWh 4563 kWh 3042 kWh £1,206 £304 £1,510 £13,494 8.9 yrs £16,700
8 kW 8691 kWh 5215 kWh 3476 kWh £1,378 £348 £1,725 £15,122 8.8 yrs £19,385

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: £1,168, Upfront: £11,639, Break-even: 10.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2173 kWh 1521 kWh 652 kWh £402 £65 £467 £6,756 14.5 yrs £2,585
3 kW 3259 kWh 2281 kWh 978 kWh £603 £98 £701 £8,383 12.0 yrs £5,627
4 kW 4346 kWh 3042 kWh 1304 kWh £804 £130 £934 £10,011 10.7 yrs £8,670
5 kW 5432 kWh 3802 kWh 1630 kWh £1,005 £163 £1,168 £11,639 10.0 yrs £11,712
6 kW 6518 kWh 4563 kWh 1956 kWh £1,206 £196 £1,401 £13,267 9.5 yrs £14,755
7 kW 7605 kWh 5323 kWh 2281 kWh £1,406 £228 £1,635 £14,894 9.1 yrs £17,797
8 kW 8691 kWh 6084 kWh 2607 kWh £1,607 £261 £1,868 £16,522 8.8 yrs £20,840

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: £1,194, Upfront: £13,389, Break-even: 11.2 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2173 kWh 1586 kWh 587 kWh £419 £59 £478 £8,506 17.8 yrs £1,049
3 kW 3259 kWh 2379 kWh 880 kWh £629 £88 £717 £10,133 14.1 yrs £4,198
4 kW 4346 kWh 3172 kWh 1173 kWh £838 £117 £955 £11,761 12.3 yrs £7,348
5 kW 5432 kWh 3965 kWh 1467 kWh £1,048 £147 £1,194 £13,389 11.2 yrs £10,497
6 kW 6518 kWh 4758 kWh 1760 kWh £1,257 £176 £1,433 £15,017 10.5 yrs £13,647
7 kW 7605 kWh 5552 kWh 2053 kWh £1,467 £205 £1,672 £16,644 10.0 yrs £16,796
8 kW 8691 kWh 6345 kWh 2347 kWh £1,676 £235 £1,911 £18,272 9.6 yrs £19,946

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: £1,212, Upfront: £15,139, 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 2173 kWh 1630 kWh 543 kWh £431 £54 £485 £10,256 21.2 yrs £-558
3 kW 3259 kWh 2444 kWh 815 kWh £646 £81 £727 £11,883 16.3 yrs £2,663
4 kW 4346 kWh 3259 kWh 1086 kWh £861 £109 £970 £13,511 13.9 yrs £5,883
5 kW 5432 kWh 4074 kWh 1358 kWh £1,076 £136 £1,212 £15,139 12.5 yrs £9,104
6 kW 6518 kWh 4889 kWh 1630 kWh £1,292 £163 £1,455 £16,767 11.5 yrs £12,325
7 kW 7605 kWh 5704 kWh 1901 kWh £1,507 £190 £1,697 £18,394 10.8 yrs £15,546
8 kW 8691 kWh 6518 kWh 2173 kWh £1,722 £217 £1,939 £20,022 10.3 yrs £18,767

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: £1,230, Upfront: £17,589, Break-even: 14.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2173 kWh 1673 kWh 500 kWh £442 £50 £492 £12,706 25.8 yrs £-2,866
3 kW 3259 kWh 2510 kWh 750 kWh £663 £75 £738 £14,333 19.4 yrs £427
4 kW 4346 kWh 3346 kWh 999 kWh £884 £100 £984 £15,961 16.2 yrs £3,719
5 kW 5432 kWh 4183 kWh 1249 kWh £1,105 £125 £1,230 £17,589 14.3 yrs £7,011
6 kW 6518 kWh 5019 kWh 1499 kWh £1,326 £150 £1,476 £19,217 13.0 yrs £10,303
7 kW 7605 kWh 5856 kWh 1749 kWh £1,547 £175 £1,722 £20,844 12.1 yrs £13,595
8 kW 8691 kWh 6692 kWh 1999 kWh £1,768 £200 £1,968 £22,472 11.4 yrs £16,888

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 PO7

Figures below are tailored to PO7 — click through for full league tables.

Big-Roof Britain Rank #927 of 2182
5.1 kWp (UK avg 5.1 kWp)
~11 panels (≈430 W)
Solar Payback Index Rank #114 of 2996
9.0 years (UK avg 10.8 years)
~£900 /yr • £8,139 upfront
Standing-Charge Drag Rank #600 of 2996
20.1% (UK avg 26.6%) drag on savings
£181 fixed • ~£900 /yr value
Aspect Penalty View ranking →
East −21.2% West −21.5%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in PO7

Monthly generation per kilowatt of solar panels

kWh 42 Jan 58 Feb 94 Mar 123 Apr 130 May 133 Jun 133 Jul 117 Aug 100 Sep 70 Oct 50 Nov 38 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 50.6% 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 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 362 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
26.42p/kWh
Daily Fixed Charge
49.70p/day
Local Sunshine
1086kWh/kW
A 1 kW system generates ~1086 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: 61% • Flats: 24% • Bungalows: 14% Based on 10,723 properties

Coverage

Havant (72%)|Winchester (27%)

Areas Covered

Waterloo, Denmead, Stakes, Purbrook, Central Meon Valley, Cowplain, Southwick and Wickham, Hart Plain + 2 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

PO8 (East Hampshire)
≈3.2 km away
Local sunshine: ~1,058 kWh/kWp · -3% vs PO7
PO6 (Portsmouth)
≈4.8 km away
Local sunshine: ~1,090 kWh/kWp · +0% vs PO7
PO9 (Havant)
≈5.2 km away
Local sunshine: ~1,096 kWh/kWp · +1% vs PO7
PO3 (Portsmouth)
≈8.0 km away
Local sunshine: ~1,096 kWh/kWp · +1% vs PO7
PO2 (Portsmouth)
≈8.0 km away
Local sunshine: ~1,096 kWh/kWp · +1% vs PO7
PO10 (Havant)
≈8.5 km away
Local sunshine: ~1,133 kWh/kWp · +4% vs PO7

Similar sunshine across the UK

CO15 (Tendring)
~1,086 kWh/kWp · +0% vs PO7
CT14 (Dover)
~1,086 kWh/kWp · -0% vs PO7
CT4 (Canterbury)
~1,087 kWh/kWp · +0% vs PO7