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Solar panel cost in Isle of Wight (PO30)

See realistic solar installation costs, savings and payback for PO30 (Isle of Wight) 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
8.7 years
After this, it's pure profit
Upfront Cost
£8,139
What you pay to get started
Annual Benefit
£938
What you save every year
Profit Over 25 Years
£15,320
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 1133 kWh/kW — 131 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 1133 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)
1133 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: £938, Upfront: £8,139, Break-even: 8.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2266 kWh 906 kWh 1359 kWh £239 £136 £375 £3,256 8.7 yrs £4,251
3 kW 3398 kWh 1359 kWh 2039 kWh £359 £204 £563 £4,883 8.7 yrs £6,377
4 kW 4531 kWh 1812 kWh 2719 kWh £479 £272 £751 £6,511 8.7 yrs £8,503
5 kW 5664 kWh 2266 kWh 3398 kWh £599 £340 £938 £8,139 8.7 yrs £10,629
6 kW 6796 kWh 2719 kWh 4078 kWh £718 £408 £1,126 £9,767 8.7 yrs £12,754
7 kW 7929 kWh 3172 kWh 4758 kWh £838 £476 £1,314 £11,394 8.7 yrs £14,880
8 kW 9062 kWh 3625 kWh 5437 kWh £958 £544 £1,501 £13,022 8.7 yrs £17,006

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: £1,124, Upfront: £10,239, 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 2266 kWh 1359 kWh 906 kWh £359 £91 £450 £5,356 11.9 yrs £3,639
3 kW 3398 kWh 2039 kWh 1359 kWh £539 £136 £675 £6,983 10.4 yrs £6,509
4 kW 4531 kWh 2719 kWh 1812 kWh £718 £181 £899 £8,611 9.6 yrs £9,379
5 kW 5664 kWh 3398 kWh 2266 kWh £898 £227 £1,124 £10,239 9.1 yrs £12,249
6 kW 6796 kWh 4078 kWh 2719 kWh £1,077 £272 £1,349 £11,867 8.8 yrs £15,118
7 kW 7929 kWh 4758 kWh 3172 kWh £1,257 £317 £1,574 £13,494 8.6 yrs £17,988
8 kW 9062 kWh 5437 kWh 3625 kWh £1,437 £362 £1,799 £15,122 8.4 yrs £20,858

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: £1,217, Upfront: £11,639, 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 2266 kWh 1586 kWh 680 kWh £419 £68 £487 £6,756 13.9 yrs £2,983
3 kW 3398 kWh 2379 kWh 1019 kWh £628 £102 £730 £8,383 11.5 yrs £6,225
4 kW 4531 kWh 3172 kWh 1359 kWh £838 £136 £974 £10,011 10.3 yrs £9,467
5 kW 5664 kWh 3965 kWh 1699 kWh £1,047 £170 £1,217 £11,639 9.6 yrs £12,709
6 kW 6796 kWh 4758 kWh 2039 kWh £1,257 £204 £1,461 £13,267 9.1 yrs £15,950
7 kW 7929 kWh 5550 kWh 2379 kWh £1,466 £238 £1,704 £14,894 8.7 yrs £19,192
8 kW 9062 kWh 6343 kWh 2719 kWh £1,676 £272 £1,948 £16,522 8.5 yrs £22,434

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: £1,245, Upfront: £13,389, Break-even: 10.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2266 kWh 1654 kWh 612 kWh £437 £61 £498 £8,506 17.1 yrs £1,457
3 kW 3398 kWh 2481 kWh 918 kWh £655 £92 £747 £10,133 13.6 yrs £4,810
4 kW 4531 kWh 3308 kWh 1223 kWh £874 £122 £996 £11,761 11.8 yrs £8,163
5 kW 5664 kWh 4135 kWh 1529 kWh £1,092 £153 £1,245 £13,389 10.8 yrs £11,517
6 kW 6796 kWh 4961 kWh 1835 kWh £1,311 £184 £1,494 £15,017 10.0 yrs £14,870
7 kW 7929 kWh 5788 kWh 2141 kWh £1,529 £214 £1,743 £16,644 9.5 yrs £18,223
8 kW 9062 kWh 6615 kWh 2447 kWh £1,748 £245 £1,992 £18,272 9.2 yrs £21,576

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: £1,264, Upfront: £15,139, 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 2266 kWh 1699 kWh 566 kWh £449 £57 £506 £10,256 20.3 yrs £-145
3 kW 3398 kWh 2549 kWh 850 kWh £673 £85 £758 £11,883 15.7 yrs £3,283
4 kW 4531 kWh 3398 kWh 1133 kWh £898 £113 £1,011 £13,511 13.4 yrs £6,711
5 kW 5664 kWh 4248 kWh 1416 kWh £1,122 £142 £1,264 £15,139 12.0 yrs £10,139
6 kW 6796 kWh 5097 kWh 1699 kWh £1,347 £170 £1,517 £16,767 11.1 yrs £13,566
7 kW 7929 kWh 5947 kWh 1982 kWh £1,571 £198 £1,769 £18,394 10.4 yrs £16,994
8 kW 9062 kWh 6796 kWh 2266 kWh £1,796 £227 £2,022 £20,022 9.9 yrs £20,422

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: £1,282, Upfront: £17,589, Break-even: 13.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2266 kWh 1744 kWh 521 kWh £461 £52 £513 £12,706 24.8 yrs £-2,446
3 kW 3398 kWh 2617 kWh 782 kWh £691 £78 £769 £14,333 18.6 yrs £1,056
4 kW 4531 kWh 3489 kWh 1042 kWh £922 £104 £1,026 £15,961 15.6 yrs £4,558
5 kW 5664 kWh 4361 kWh 1303 kWh £1,152 £130 £1,282 £17,589 13.7 yrs £8,061
6 kW 6796 kWh 5233 kWh 1563 kWh £1,383 £156 £1,539 £19,217 12.5 yrs £11,563
7 kW 7929 kWh 6106 kWh 1824 kWh £1,613 £182 £1,795 £20,844 11.6 yrs £15,065
8 kW 9062 kWh 6978 kWh 2084 kWh £1,844 £208 £2,052 £22,472 11.0 yrs £18,567

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 Isle of Wight

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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Understand DNO, G98 and G99 export limits

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Insights for PO30

Figures below are tailored to PO30 — click through for full league tables.

Big-Roof Britain Rank #1482 of 2182
4.7 kWp (UK avg 5.1 kWp)
~10 panels (≈430 W)
Solar Payback Index Rank #28 of 2996
8.7 years (UK avg 10.8 years)
~£939 /yr • £8,139 upfront
Standing-Charge Drag Rank #362 of 2996
19.3% (UK avg 26.6%) drag on savings
£181 fixed • ~£939 /yr value
Aspect Penalty View ranking →
East −20.8% West −22.7%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in PO30

Monthly generation per kilowatt of solar panels

kWh 42 Jan 59 Feb 100 Mar 130 Apr 137 May 138 Jun 140 Jul 123 Aug 103 Sep 71 Oct 51 Nov 38 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 49.2% 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 94 kWh. So a typical 4 kW home system would generate roughly 186 kWh in winter, or 378 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
26.42p/kWh
Daily Fixed Charge
49.70p/day
Local Sunshine
1133kWh/kW
A 1 kW system generates ~1133 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: 63% • Flats: 23% • Bungalows: 12% Based on 9,168 properties

Coverage

Isle of Wight (100%)

Areas Covered

Newport Central, Brighstone, Calbourne & Shalfleet, Parkhurst & Hunnyhill, Carisbrooke & Gunville, Pan & Barton, Newport West, Mountjoy & Shide + 7 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

PO32 (Isle of Wight)
≈6.0 km away
Local sunshine: ~1,062 kWh/kWp · -6% vs PO30
PO31 (Isle of Wight)
≈6.4 km away
Local sunshine: ~1,067 kWh/kWp · -6% vs PO30
PO33 (Isle of Wight)
≈9.8 km away
Local sunshine: ~1,088 kWh/kWp · -4% vs PO30
PO36 (Isle of Wight)
≈11.0 km away
Local sunshine: ~1,110 kWh/kWp · -2% vs PO30
PO37 (Isle of Wight)
≈11.2 km away
Local sunshine: ~1,108 kWh/kWp · -2% vs PO30
PO38 (Isle of Wight)
≈12.6 km away
Local sunshine: ~1,125 kWh/kWp · -1% vs PO30

Similar sunshine across the UK

BN27 (Wealden)
~1,134 kWh/kWp · +0% vs PO30
BN25 (Lewes)
~1,131 kWh/kWp · -0% vs PO30
BN21 (Eastbourne)
~1,135 kWh/kWp · +0% vs PO30