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Big Roof Britain Solar Payback Index Standing Charge Drag

Solar Panels in WA13 (Warrington)

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

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
13.2 years
After this, it's pure profit
Upfront Cost
£12,207
What you pay to get started
Annual Benefit
£925
What you save every year
Profit Over 25 Years
£10,916
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 Wales and Mersey, the current unit rate is 27.72p/kWh with a 69.95p/day standing charge. Your postcode’s south-facing sunshine yield is 902 kWh/kW — 28 below the regional median (930).

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 902 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
70.0p/day
Sunshine yield (south)
902 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: £771, Upfront: £10,173, Break-even: 13.2 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1804 kWh 722 kWh 1083 kWh £200 £108 £308 £4,069 13.2 yrs £2,097
3 kW 2706 kWh 1083 kWh 1624 kWh £300 £162 £462 £6,104 13.2 yrs £3,146
4 kW 3608 kWh 1443 kWh 2165 kWh £400 £217 £617 £8,138 13.2 yrs £4,194
5 kW 4510 kWh 1804 kWh 2706 kWh £500 £271 £771 £10,173 13.2 yrs £5,243
6 kW 5413 kWh 2165 kWh 3248 kWh £600 £325 £925 £12,207 13.2 yrs £6,291
7 kW 6315 kWh 2526 kWh 3789 kWh £700 £379 £1,079 £14,242 13.2 yrs £7,340
8 kW 7217 kWh 2887 kWh 4330 kWh £800 £433 £1,233 £16,276 13.2 yrs £8,388

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: £931, Upfront: £12,273, Break-even: 13.2 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1804 kWh 1083 kWh 722 kWh £300 £72 £372 £6,169 16.6 yrs £1,276
3 kW 2706 kWh 1624 kWh 1083 kWh £450 £108 £558 £8,204 14.7 yrs £2,964
4 kW 3608 kWh 2165 kWh 1443 kWh £600 £144 £744 £10,238 13.8 yrs £4,652
5 kW 4510 kWh 2706 kWh 1804 kWh £750 £180 £931 £12,273 13.2 yrs £6,340
6 kW 5413 kWh 3248 kWh 2165 kWh £900 £217 £1,117 £14,307 12.8 yrs £8,027
7 kW 6315 kWh 3789 kWh 2526 kWh £1,050 £253 £1,303 £16,342 12.5 yrs £9,715
8 kW 7217 kWh 4330 kWh 2887 kWh £1,200 £289 £1,489 £18,376 12.3 yrs £11,403

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: £1,011, Upfront: £13,673, Break-even: 13.5 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1804 kWh 1263 kWh 541 kWh £350 £54 £404 £7,569 18.7 yrs £515
3 kW 2706 kWh 1894 kWh 812 kWh £525 £81 £606 £9,604 15.8 yrs £2,523
4 kW 3608 kWh 2526 kWh 1083 kWh £700 £108 £808 £11,638 14.4 yrs £4,530
5 kW 4510 kWh 3157 kWh 1353 kWh £875 £135 £1,011 £13,673 13.5 yrs £6,538
6 kW 5413 kWh 3789 kWh 1624 kWh £1,050 £162 £1,213 £15,707 13.0 yrs £8,546
7 kW 6315 kWh 4420 kWh 1894 kWh £1,225 £189 £1,415 £17,742 12.5 yrs £10,553
8 kW 7217 kWh 5052 kWh 2165 kWh £1,400 £217 £1,617 £19,776 12.2 yrs £12,561

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: £1,035, Upfront: £15,423, Break-even: 14.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1804 kWh 1317 kWh 487 kWh £365 £49 £414 £9,319 22.5 yrs £-1,043
3 kW 2706 kWh 1976 kWh 731 kWh £548 £73 £621 £11,354 18.3 yrs £1,061
4 kW 3608 kWh 2634 kWh 974 kWh £730 £97 £828 £13,388 16.2 yrs £3,164
5 kW 4510 kWh 3293 kWh 1218 kWh £913 £122 £1,035 £15,423 14.9 yrs £5,268
6 kW 5413 kWh 3951 kWh 1461 kWh £1,095 £146 £1,241 £17,457 14.1 yrs £7,371
7 kW 6315 kWh 4610 kWh 1705 kWh £1,278 £170 £1,448 £19,492 13.5 yrs £9,475
8 kW 7217 kWh 5268 kWh 1949 kWh £1,460 £195 £1,655 £21,526 13.0 yrs £11,578

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: £1,050, Upfront: £17,173, Break-even: 16.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1804 kWh 1353 kWh 451 kWh £375 £45 £420 £11,069 26.3 yrs £-2,665
3 kW 2706 kWh 2030 kWh 677 kWh £563 £68 £630 £13,104 20.8 yrs £-498
4 kW 3608 kWh 2706 kWh 902 kWh £750 £90 £840 £15,138 18.0 yrs £1,670
5 kW 4510 kWh 3383 kWh 1128 kWh £938 £113 £1,050 £17,173 16.3 yrs £3,837
6 kW 5413 kWh 4059 kWh 1353 kWh £1,125 £135 £1,261 £19,207 15.2 yrs £6,005
7 kW 6315 kWh 4736 kWh 1579 kWh £1,313 £158 £1,471 £21,242 14.4 yrs £8,172
8 kW 7217 kWh 5413 kWh 1804 kWh £1,500 £180 £1,681 £23,276 13.8 yrs £10,340

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: £1,066, Upfront: £19,623, 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 1804 kWh 1389 kWh 415 kWh £385 £41 £427 £13,519 31.7 yrs £-4,987
3 kW 2706 kWh 2084 kWh 622 kWh £578 £62 £640 £15,554 24.3 yrs £-2,756
4 kW 3608 kWh 2778 kWh 830 kWh £770 £83 £853 £17,588 20.6 yrs £-524
5 kW 4510 kWh 3473 kWh 1037 kWh £963 £104 £1,066 £19,623 18.4 yrs £1,707
6 kW 5413 kWh 4168 kWh 1245 kWh £1,155 £124 £1,280 £21,657 16.9 yrs £3,938
7 kW 6315 kWh 4862 kWh 1452 kWh £1,348 £145 £1,493 £23,692 15.9 yrs £6,170
8 kW 7217 kWh 5557 kWh 1660 kWh £1,540 £166 £1,706 £25,726 15.1 yrs £8,401

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 WA13

Figures below are tailored to WA13 — click through for full league tables.

Big-Roof Britain Rank #568 of 2182
5.5 kWp (UK avg 5.1 kWp)
~11 panels (≈430 W)
Solar Payback Index Rank #1714 of 2997
11.4 years (UK avg 11.3 years)
~£1,069 /yr • £12,207 upfront
Standing-Charge Drag Rank #2129 of 2997
23.9% (UK avg 21.7%) drag on savings
£255 fixed • ~£1,069 /yr value

Your Area at a Glance

Your Electricity Rate
27.72p/kWh
Daily Fixed Charge
69.95p/day
Local Sunshine
902kWh/kW
A 1 kW system generates ~902 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: 70% • Flats: 17% • Bungalows: 12% Based on 3,170 properties

Coverage

Warrington (86%)|Trafford (11%)|Cheshire East (3%)

Areas Covered

Lymm South, Lymm North and Thelwall, Bowdon, Altrincham, High Legh, Bucklow-St Martins

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 Wales and Mersey

WA4 (Warrington)
≈7.1 km away
Local sunshine: ~910 kWh/kWp · +1% vs WA13
WA1 (Warrington)
≈7.8 km away
Local sunshine: ~910 kWh/kWp · +1% vs WA13
WA2 (Warrington)
≈8.1 km away
Local sunshine: ~905 kWh/kWp · +0% vs WA13
WA55 (Warrington)
≈8.8 km away
Local sunshine: ~911 kWh/kWp · +1% vs WA13
WA5 (Warrington)
≈10.5 km away
Local sunshine: ~907 kWh/kWp · +0% vs WA13
WA16 (Cheshire East)
≈11.2 km away
Local sunshine: ~904 kWh/kWp · +0% vs WA13

Similar sunshine across the UK

NE47 (Northumberland)
~902 kWh/kWp · +0% vs WA13
TS15 (Stockton-on-Tees)
~902 kWh/kWp · +0% vs WA13
TD13 (Scottish Borders)
~902 kWh/kWp · -0% vs WA13