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Big Roof Britain Solar Payback Index Standing Charge Drag

Solar Panels in LA10 (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
14.8 years
After this, it's pure profit
Upfront Cost
£10,173
What you pay to get started
Annual Benefit
£687
What you save every year
Profit Over 25 Years
£7,014
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 816 kWh/kW — 54 below the regional median (870).

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 816 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)
816 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: £687, Upfront: £10,173, Break-even: 14.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1633 kWh 653 kWh 980 kWh £177 £98 £275 £4,069 14.8 yrs £1,431
3 kW 2449 kWh 980 kWh 1469 kWh £266 £147 £412 £6,104 14.8 yrs £2,146
4 kW 3265 kWh 1306 kWh 1959 kWh £354 £196 £550 £8,138 14.8 yrs £2,861
5 kW 4081 kWh 1633 kWh 2449 kWh £443 £245 £687 £10,173 14.8 yrs £3,577
6 kW 4898 kWh 1959 kWh 2939 kWh £531 £294 £825 £12,207 14.8 yrs £4,292
7 kW 5714 kWh 2286 kWh 3428 kWh £620 £343 £962 £14,242 14.8 yrs £5,007
8 kW 6530 kWh 2612 kWh 3918 kWh £708 £392 £1,100 £16,276 14.8 yrs £5,723

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: £827, Upfront: £12,273, Break-even: 14.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1633 kWh 980 kWh 653 kWh £266 £65 £331 £6,169 18.6 yrs £448
3 kW 2449 kWh 1469 kWh 980 kWh £398 £98 £496 £8,204 16.5 yrs £1,722
4 kW 3265 kWh 1959 kWh 1306 kWh £531 £131 £662 £10,238 15.5 yrs £2,996
5 kW 4081 kWh 2449 kWh 1633 kWh £664 £163 £827 £12,273 14.8 yrs £4,270
6 kW 4898 kWh 2939 kWh 1959 kWh £797 £196 £993 £14,307 14.4 yrs £5,544
7 kW 5714 kWh 3428 kWh 2286 kWh £929 £229 £1,158 £16,342 14.1 yrs £6,818
8 kW 6530 kWh 3918 kWh 2612 kWh £1,062 £261 £1,323 £18,376 13.9 yrs £8,092

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: £897, Upfront: £13,673, Break-even: 15.2 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1633 kWh 1143 kWh 490 kWh £310 £49 £359 £7,569 21.1 yrs £-393
3 kW 2449 kWh 1714 kWh 735 kWh £465 £73 £538 £9,604 17.8 yrs £1,160
4 kW 3265 kWh 2286 kWh 980 kWh £620 £98 £718 £11,638 16.2 yrs £2,713
5 kW 4081 kWh 2857 kWh 1224 kWh £775 £122 £897 £13,673 15.2 yrs £4,267
6 kW 4898 kWh 3428 kWh 1469 kWh £929 £147 £1,076 £15,707 14.6 yrs £5,820
7 kW 5714 kWh 4000 kWh 1714 kWh £1,084 £171 £1,256 £17,742 14.1 yrs £7,373
8 kW 6530 kWh 4571 kWh 1959 kWh £1,239 £196 £1,435 £19,776 13.8 yrs £8,927

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: £918, Upfront: £15,423, Break-even: 16.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1633 kWh 1192 kWh 441 kWh £323 £44 £367 £9,319 25.4 yrs £-1,976
3 kW 2449 kWh 1788 kWh 661 kWh £485 £66 £551 £11,354 20.6 yrs £-339
4 kW 3265 kWh 2384 kWh 882 kWh £646 £88 £734 £13,388 18.2 yrs £1,298
5 kW 4081 kWh 2979 kWh 1102 kWh £808 £110 £918 £15,423 16.8 yrs £2,936
6 kW 4898 kWh 3575 kWh 1322 kWh £969 £132 £1,101 £17,457 15.8 yrs £4,573
7 kW 5714 kWh 4171 kWh 1543 kWh £1,131 £154 £1,285 £19,492 15.2 yrs £6,210
8 kW 6530 kWh 4767 kWh 1763 kWh £1,292 £176 £1,469 £21,526 14.7 yrs £7,847

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: £932, Upfront: £17,173, Break-even: 18.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1633 kWh 1224 kWh 408 kWh £332 £41 £373 £11,069 29.7 yrs £-3,614
3 kW 2449 kWh 1837 kWh 612 kWh £498 £61 £559 £13,104 23.4 yrs £-1,921
4 kW 3265 kWh 2449 kWh 816 kWh £664 £82 £745 £15,138 20.3 yrs £-228
5 kW 4081 kWh 3061 kWh 1020 kWh £830 £102 £932 £17,173 18.4 yrs £1,465
6 kW 4898 kWh 3673 kWh 1224 kWh £996 £122 £1,118 £19,207 17.2 yrs £3,158
7 kW 5714 kWh 4285 kWh 1428 kWh £1,162 £143 £1,305 £21,242 16.3 yrs £4,851
8 kW 6530 kWh 4898 kWh 1633 kWh £1,328 £163 £1,491 £23,276 15.6 yrs £6,544

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: £946, Upfront: £19,623, Break-even: 20.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1633 kWh 1257 kWh 375 kWh £341 £38 £378 £13,519 35.7 yrs £-5,952
3 kW 2449 kWh 1886 kWh 563 kWh £511 £56 £568 £15,554 27.4 yrs £-4,203
4 kW 3265 kWh 2514 kWh 751 kWh £682 £75 £757 £17,588 23.2 yrs £-2,455
5 kW 4081 kWh 3143 kWh 939 kWh £852 £94 £946 £19,623 20.7 yrs £-706
6 kW 4898 kWh 3771 kWh 1126 kWh £1,022 £113 £1,135 £21,657 19.1 yrs £1,043
7 kW 5714 kWh 4400 kWh 1314 kWh £1,193 £131 £1,324 £23,692 17.9 yrs £2,792
8 kW 6530 kWh 5028 kWh 1502 kWh £1,363 £150 £1,513 £25,726 17.0 yrs £4,541

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 LA10

Figures below are tailored to LA10 — click through for full league tables.

Big-Roof Britain Rank #658 of 2182
5.4 kWp (UK avg 5.1 kWp)
~11 panels (≈430 W)
Solar Payback Index Rank #2740 of 2997
12.8 years (UK avg 11.3 years)
~£792 /yr • £10,173 upfront
Standing-Charge Drag Rank #2117 of 2997
23.6% (UK avg 21.7%) drag on savings
£187 fixed • ~£792 /yr value

Your Area at a Glance

Your Electricity Rate
27.11p/kWh
Daily Fixed Charge
51.16p/day
Local Sunshine
816kWh/kW
A 1 kW system generates ~816 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: 75% • Flats: 13% • Bungalows: 11% Based on 1,048 properties

Coverage

Westmorland and Furness (98%)|North Yorkshire (2%)

Areas Covered

Sedbergh and Kirkby Lonsdale, Upper Dales, Kirkby Stephen and Tebay

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

LA9 (Westmorland and Furness)
≈14.4 km away
Local sunshine: ~852 kWh/kWp · +4% vs LA10
LA8 (Westmorland and Furness)
≈16.1 km away
Local sunshine: ~874 kWh/kWp · +7% vs LA10
LA6 (Westmorland and Furness)
≈16.7 km away
Local sunshine: ~892 kWh/kWp · +9% vs LA10
LA7 (Westmorland and Furness)
≈19.3 km away
Local sunshine: ~896 kWh/kWp · +10% vs LA10
CA17 (Westmorland and Furness)
≈20.4 km away
Local sunshine: ~792 kWh/kWp · -3% vs LA10
LA23 (Westmorland and Furness)
≈25.7 km away
Local sunshine: ~846 kWh/kWp · +4% vs LA10

Similar sunshine across the UK

PA74 (Argyll and Bute)
~816 kWh/kWp · -0% vs LA10
SY20 (Powys)
~817 kWh/kWp · +0% vs LA10
G67 (North Lanarkshire)
~817 kWh/kWp · +0% vs LA10