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Big Roof Britain Solar Payback Index Standing Charge Drag

Solar Panels in CA10 (Westmorland and Furness)

See if solar pays off for you in Westmorland and Furness — price, savings and payback in under a minute (official UK data).

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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
14.0 years
After this, it's pure profit
Upfront Cost
£12,207
What you pay to get started
Annual Benefit
£874
What you save every year
Profit Over 25 Years
£9,653
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: Bigger systems don’t shorten payback—cost and savings rise together per kW.
  • 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

Costs: Battery prices are typically £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 West, the current unit rate is 27.11p/kWh with a 51.16p/day standing charge. Your postcode’s south-facing sunshine yield is 865 kWh/kW — 5 below the regional median (870).

Read the full story

A typical roof here lands around 6.0 kW, with most eligible homes comfortably fitting within 3–6 kW. Each kilowatt of panels produces roughly 865 kWh per year on a south-facing roof. We value self-used electricity at 27.1p and exported surplus at a baseline 10p via SEG. Use the calculator above for your exact tariff.

Unit rate
27.1p/kWh
Standing charge
51.2p/day
Sunshine yield (south)
865 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: £729, Upfront: £10,173, Break-even: 14.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1730 kWh 692 kWh 1038 kWh £188 £104 £291 £4,069 14.0 yrs £1,760
3 kW 2596 kWh 1038 kWh 1557 kWh £281 £156 £437 £6,104 14.0 yrs £2,640
4 kW 3461 kWh 1384 kWh 2076 kWh £375 £208 £583 £8,138 14.0 yrs £3,520
5 kW 4326 kWh 1730 kWh 2596 kWh £469 £260 £729 £10,173 14.0 yrs £4,401
6 kW 5191 kWh 2076 kWh 3115 kWh £563 £311 £874 £12,207 14.0 yrs £5,281
7 kW 6056 kWh 2423 kWh 3634 kWh £657 £363 £1,020 £14,242 14.0 yrs £6,161
8 kW 6921 kWh 2769 kWh 4153 kWh £751 £415 £1,166 £16,276 14.0 yrs £7,041

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

3 kWh battery 5 kW example → Annual benefit: £877, Upfront: £12,273, Break-even: 14.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1730 kWh 1038 kWh 692 kWh £281 £69 £351 £6,169 17.6 yrs £844
3 kW 2596 kWh 1557 kWh 1038 kWh £422 £104 £526 £8,204 15.6 yrs £2,317
4 kW 3461 kWh 2076 kWh 1384 kWh £563 £138 £701 £10,238 14.6 yrs £3,789
5 kW 4326 kWh 2596 kWh 1730 kWh £704 £173 £877 £12,273 14.0 yrs £5,261
6 kW 5191 kWh 3115 kWh 2076 kWh £844 £208 £1,052 £14,307 13.6 yrs £6,733
7 kW 6056 kWh 3634 kWh 2423 kWh £985 £242 £1,227 £16,342 13.3 yrs £8,206
8 kW 6921 kWh 4153 kWh 2769 kWh £1,126 £277 £1,403 £18,376 13.1 yrs £9,678

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

5 kWh battery 5 kW example → Annual benefit: £951, Upfront: £13,673, 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 1730 kWh 1211 kWh 519 kWh £328 £52 £380 £7,569 19.9 yrs £37
3 kW 2596 kWh 1817 kWh 779 kWh £493 £78 £570 £9,604 16.8 yrs £1,805
4 kW 3461 kWh 2423 kWh 1038 kWh £657 £104 £761 £11,638 15.3 yrs £3,573
5 kW 4326 kWh 3028 kWh 1298 kWh £821 £130 £951 £13,673 14.4 yrs £5,342
6 kW 5191 kWh 3634 kWh 1557 kWh £985 £156 £1,141 £15,707 13.8 yrs £7,110
7 kW 6056 kWh 4239 kWh 1817 kWh £1,149 £182 £1,331 £17,742 13.3 yrs £8,878
8 kW 6921 kWh 4845 kWh 2076 kWh £1,313 £208 £1,521 £19,776 13.0 yrs £10,646

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

7.5 kWh battery 5 kW example → Annual benefit: £973, Upfront: £15,423, Break-even: 15.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1730 kWh 1263 kWh 467 kWh £342 £47 £389 £9,319 23.9 yrs £-1,536
3 kW 2596 kWh 1895 kWh 701 kWh £514 £70 £584 £11,354 19.4 yrs £321
4 kW 3461 kWh 2526 kWh 934 kWh £685 £93 £778 £13,388 17.2 yrs £2,178
5 kW 4326 kWh 3158 kWh 1168 kWh £856 £117 £973 £15,423 15.9 yrs £4,036
6 kW 5191 kWh 3789 kWh 1402 kWh £1,027 £140 £1,167 £17,457 15.0 yrs £5,893
7 kW 6056 kWh 4421 kWh 1635 kWh £1,199 £164 £1,362 £19,492 14.3 yrs £7,750
8 kW 6921 kWh 5053 kWh 1869 kWh £1,370 £187 £1,557 £21,526 13.8 yrs £9,607

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

10 kWh battery 5 kW example → Annual benefit: £988, Upfront: £17,173, Break-even: 17.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1730 kWh 1298 kWh 433 kWh £352 £43 £395 £11,069 28.0 yrs £-3,167
3 kW 2596 kWh 1947 kWh 649 kWh £528 £65 £593 £13,104 22.1 yrs £-1,251
4 kW 3461 kWh 2596 kWh 865 kWh £704 £87 £790 £15,138 19.2 yrs £665
5 kW 4326 kWh 3244 kWh 1081 kWh £880 £108 £988 £17,173 17.4 yrs £2,582
6 kW 5191 kWh 3893 kWh 1298 kWh £1,055 £130 £1,185 £19,207 16.2 yrs £4,498
7 kW 6056 kWh 4542 kWh 1514 kWh £1,231 £151 £1,383 £21,242 15.4 yrs £6,414
8 kW 6921 kWh 5191 kWh 1730 kWh £1,407 £173 £1,580 £23,276 14.7 yrs £8,331

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

13.5 kWh battery 5 kW example → Annual benefit: £1,003, Upfront: £19,623, Break-even: 19.6 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1730 kWh 1332 kWh 398 kWh £361 £40 £401 £13,519 33.7 yrs £-5,499
3 kW 2596 kWh 1999 kWh 597 kWh £542 £60 £602 £15,554 25.9 yrs £-3,523
4 kW 3461 kWh 2665 kWh 796 kWh £722 £80 £802 £17,588 21.9 yrs £-1,548
5 kW 4326 kWh 3331 kWh 995 kWh £903 £99 £1,003 £19,623 19.6 yrs £428
6 kW 5191 kWh 3997 kWh 1194 kWh £1,084 £119 £1,203 £21,657 18.0 yrs £2,403
7 kW 6056 kWh 4663 kWh 1393 kWh £1,264 £139 £1,404 £23,692 16.9 yrs £4,379
8 kW 6921 kWh 5330 kWh 1592 kWh £1,445 £159 £1,604 £25,726 16.0 yrs £6,354

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, 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.

Insights for CA10

Figures below are tailored to CA10 — click through for full league tables.

Big-Roof Britain Rank #155 of 2182
6.3 kWp (UK avg 5.1 kWp)
~13 panels (≈430 W)
Solar Payback Index Rank #2384 of 2997
12.1 years (UK avg 11.3 years)
~£1,008 /yr • £12,207 upfront
Standing-Charge Drag Rank #1149 of 2997
18.5% (UK avg 21.7%) drag on savings
£187 fixed • ~£1,008 /yr value

Your Area at a Glance

Your Electricity Rate
27.11p/kWh
Daily Fixed Charge
51.16p/day
Local Sunshine
865kWh/kW
A 1 kW system generates ~865 kWh per year. A typical home uses ~2,700 kWh per year.
Typical System Size
6.0kW
For houses & bungalows in this area

Local Property Data

Property Types

Houses: 79% • Flats: 3% • Bungalows: 18% Based on 4,967 properties

Coverage

Westmorland and Furness (100%)

Areas Covered

Eamont and Shap, Eden and Lyvennet Vale, Alston and Fellside, Kirkby Stephen and Tebay, Hesket and Lazonby, Penrith South

Data Sources & Assumptions

Solar yield: PVGIS (EU Joint Research Centre), January 2025 data

Electricity rates: Ofgem price cap, Q4 2025

Installation costs: MCS certified installer data, March 2025

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 West

CA11 (Westmorland and Furness)
≈6.9 km away
Local sunshine: ~877 kWh/kWp · +1% vs CA10
CA16 (Westmorland and Furness)
≈12.8 km away
Local sunshine: ~855 kWh/kWp · -1% vs CA10
CA9 (Westmorland and Furness)
≈25.4 km away
Local sunshine: ~803 kWh/kWp · -7% vs CA10
CA17 (Westmorland and Furness)
≈26.7 km away
Local sunshine: ~792 kWh/kWp · -8% vs CA10
CA4 (Cumberland)
≈28.8 km away
Local sunshine: ~875 kWh/kWp · +1% vs CA10
LA22 (Westmorland and Furness)
≈29.2 km away
Local sunshine: ~836 kWh/kWp · -3% vs CA10

Similar sunshine across the UK

KA2 (East Ayrshire)
~865 kWh/kWp · -0% vs CA10
KA1 (East Ayrshire)
~866 kWh/kWp · +0% vs CA10
BT41 (Antrim and Newtownabbey)
~866 kWh/kWp · +0% vs CA10