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Solar panel cost in Flintshire (CH8)

See realistic solar installation costs, savings and payback for CH8 (Flintshire) 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
10.3 years
After this, it's pure profit
Upfront Cost
£8,139
What you pay to get started
Annual Benefit
£789
What you save every year
Profit Over 25 Years
£11,587
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 North Wales and Mersey, the current unit rate is 27.66p/kWh with a 70.76p/day standing charge. Your postcode’s south-facing sunshine yield is 925 kWh/kW — 5 below the regional median (930).

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 925 kWh per year on a south-facing roof. We value self-used electricity at 27.7p and exported surplus at a baseline 10p via SEG. Use the calculator above for your exact tariff.

Unit rate
27.7p/kWh
Standing charge
70.8p/day
Sunshine yield (south)
925 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: £789, Upfront: £8,139, Break-even: 10.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1850 kWh 740 kWh 1110 kWh £205 £111 £316 £3,256 10.3 yrs £3,057
3 kW 2774 kWh 1110 kWh 1665 kWh £307 £166 £473 £4,883 10.3 yrs £4,585
4 kW 3699 kWh 1480 kWh 2220 kWh £409 £222 £631 £6,511 10.3 yrs £6,114
5 kW 4624 kWh 1850 kWh 2774 kWh £512 £277 £789 £8,139 10.3 yrs £7,642
6 kW 5549 kWh 2220 kWh 3329 kWh £614 £333 £947 £9,767 10.3 yrs £9,171
7 kW 6474 kWh 2589 kWh 3884 kWh £716 £388 £1,105 £11,394 10.3 yrs £10,699
8 kW 7398 kWh 2959 kWh 4439 kWh £819 £444 £1,262 £13,022 10.3 yrs £12,227

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: £952, Upfront: £10,239, 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 1850 kWh 1110 kWh 740 kWh £307 £74 £381 £5,356 14.1 yrs £2,263
3 kW 2774 kWh 1665 kWh 1110 kWh £460 £111 £571 £6,983 12.2 yrs £4,445
4 kW 3699 kWh 2220 kWh 1480 kWh £614 £148 £762 £8,611 11.3 yrs £6,627
5 kW 4624 kWh 2774 kWh 1850 kWh £767 £185 £952 £10,239 10.8 yrs £8,809
6 kW 5549 kWh 3329 kWh 2220 kWh £921 £222 £1,143 £11,867 10.4 yrs £10,990
7 kW 6474 kWh 3884 kWh 2589 kWh £1,074 £259 £1,333 £13,494 10.1 yrs £13,172
8 kW 7398 kWh 4439 kWh 2959 kWh £1,228 £296 £1,524 £15,122 9.9 yrs £15,354

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: £1,034, Upfront: £11,639, 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 1850 kWh 1295 kWh 555 kWh £358 £55 £414 £6,756 16.3 yrs £1,517
3 kW 2774 kWh 1942 kWh 832 kWh £537 £83 £620 £8,383 13.5 yrs £4,025
4 kW 3699 kWh 2589 kWh 1110 kWh £716 £111 £827 £10,011 12.1 yrs £6,533
5 kW 4624 kWh 3237 kWh 1387 kWh £895 £139 £1,034 £11,639 11.3 yrs £9,042
6 kW 5549 kWh 3884 kWh 1665 kWh £1,074 £166 £1,241 £13,267 10.7 yrs £11,550
7 kW 6474 kWh 4532 kWh 1942 kWh £1,253 £194 £1,448 £14,894 10.3 yrs £14,059
8 kW 7398 kWh 5179 kWh 2220 kWh £1,432 £222 £1,654 £16,522 10.0 yrs £16,567

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: £1,059, Upfront: £13,389, 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 1850 kWh 1350 kWh 499 kWh £373 £50 £423 £8,506 20.1 yrs £-37
3 kW 2774 kWh 2025 kWh 749 kWh £560 £75 £635 £10,133 16.0 yrs £2,569
4 kW 3699 kWh 2700 kWh 999 kWh £747 £100 £847 £11,761 13.9 yrs £5,175
5 kW 4624 kWh 3376 kWh 1248 kWh £934 £125 £1,059 £13,389 12.6 yrs £7,782
6 kW 5549 kWh 4051 kWh 1498 kWh £1,120 £150 £1,270 £15,017 11.8 yrs £10,388
7 kW 6474 kWh 4726 kWh 1748 kWh £1,307 £175 £1,482 £16,644 11.2 yrs £12,994
8 kW 7398 kWh 5401 kWh 1998 kWh £1,494 £200 £1,694 £18,272 10.8 yrs £15,601

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: £1,075, Upfront: £15,139, Break-even: 14.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1850 kWh 1387 kWh 462 kWh £384 £46 £430 £10,256 23.9 yrs £-1,657
3 kW 2774 kWh 2081 kWh 694 kWh £576 £69 £645 £11,883 18.4 yrs £1,015
4 kW 3699 kWh 2774 kWh 925 kWh £767 £92 £860 £13,511 15.7 yrs £3,687
5 kW 4624 kWh 3468 kWh 1156 kWh £959 £116 £1,075 £15,139 14.1 yrs £6,358
6 kW 5549 kWh 4162 kWh 1387 kWh £1,151 £139 £1,290 £16,767 13.0 yrs £9,030
7 kW 6474 kWh 4855 kWh 1618 kWh £1,343 £162 £1,505 £18,394 12.2 yrs £11,702
8 kW 7398 kWh 5549 kWh 1850 kWh £1,535 £185 £1,720 £20,022 11.6 yrs £14,373

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: £1,091, Upfront: £17,589, Break-even: 16.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1850 kWh 1424 kWh 425 kWh £394 £43 £436 £12,706 29.1 yrs £-3,976
3 kW 2774 kWh 2136 kWh 638 kWh £591 £64 £655 £14,333 21.9 yrs £-1,239
4 kW 3699 kWh 2848 kWh 851 kWh £788 £85 £873 £15,961 18.3 yrs £1,498
5 kW 4624 kWh 3561 kWh 1064 kWh £985 £106 £1,091 £17,589 16.1 yrs £4,235
6 kW 5549 kWh 4273 kWh 1276 kWh £1,182 £128 £1,309 £19,217 14.7 yrs £6,972
7 kW 6474 kWh 4985 kWh 1489 kWh £1,379 £149 £1,528 £20,844 13.6 yrs £9,709
8 kW 7398 kWh 5697 kWh 1702 kWh £1,576 £170 £1,746 £22,472 12.9 yrs £12,446

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 Flintshire

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 CH8

Figures below are tailored to CH8 — click through for full league tables.

Big-Roof Britain Rank #665 of 2182
5.4 kWp (UK avg 5.1 kWp)
~11 panels (≈430 W)
Solar Payback Index Rank #1347 of 2996
10.3 years (UK avg 10.8 years)
~£789 /yr • £8,139 upfront
Standing-Charge Drag Rank #2504 of 2996
32.7% (UK avg 26.6%) drag on savings
£258 fixed • ~£789 /yr value
Aspect Penalty View ranking →
East −20.3% West −20.0%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in CH8

Monthly generation per kilowatt of solar panels

kWh 29 Jan 49 Feb 81 Mar 108 Apr 121 May 116 Jun 113 Jul 105 Aug 85 Sep 58 Oct 35 Nov 25 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 44.6% of an average month (Dec–Feb)

Best / worst month: May / Dec

These figures show output per kilowatt (kW) of panels installed. In winter, a 1 kW system here produces about 34 kWh per month; the average month produces around 77 kWh. So a typical 4 kW home system would generate roughly 138 kWh in winter, or 308 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
27.66p/kWh
Daily Fixed Charge
70.76p/day
Local Sunshine
925kWh/kW
A 1 kW system generates ~925 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: 67% • Flats: 10% • Bungalows: 22% Based on 6,893 properties

Coverage

Flintshire (100%)

Areas Covered

Llanasa and Trelawnyd, Holywell Central, Brynford and Halkyn, Greenfield, Whitford, Holywell West, Mostyn, Holywell East + 4 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 North Wales and Mersey

CH6 (Flintshire)
≈6.7 km away
Local sunshine: ~946 kWh/kWp · +2% vs CH8
CH60 (Wirral)
≈10.1 km away
Local sunshine: ~945 kWh/kWp · +2% vs CH8
L60 (Wirral)
≈10.1 km away
Local sunshine: ~945 kWh/kWp · +2% vs CH8
CH31 (Wirral)
≈10.2 km away
Local sunshine: ~945 kWh/kWp · +2% vs CH8
L48 (Wirral)
≈10.9 km away
Local sunshine: ~953 kWh/kWp · +3% vs CH8
CH33 (Cheshire West and Chester)
≈10.9 km away
Local sunshine: ~945 kWh/kWp · +2% vs CH8

Similar sunshine across the UK

DH7 (County Durham)
~925 kWh/kWp · -0% vs CH8
DY3 (Dudley)
~925 kWh/kWp · -0% vs CH8
NE10 (Gateshead)
~925 kWh/kWp · +0% vs CH8