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Solar panel cost in Powys (LD2)

See realistic solar installation costs, savings and payback for LD2 (Powys) 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
10.8 years
After this, it's pure profit
Upfront Cost
£9,767
What you pay to get started
Annual Benefit
£905
What you save every year
Profit Over 25 Years
£12,868
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 South Wales, the current unit rate is 26.33p/kWh with a 57.84p/day standing charge. Your postcode’s south-facing sunshine yield is 913 kWh/kW — 56 below the regional median (968).

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 913 kWh per year on a south-facing roof. We value self-used electricity at 26.3p and exported surplus at a baseline 10p via SEG. Use the calculator above for your exact tariff.

Unit rate
26.3p/kWh
Standing charge
57.8p/day
Sunshine yield (south)
913 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: £754, Upfront: £8,139, 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 1826 kWh 730 kWh 1095 kWh £192 £110 £302 £3,256 10.8 yrs £2,780
3 kW 2738 kWh 1095 kWh 1643 kWh £288 £164 £453 £4,883 10.8 yrs £4,171
4 kW 3651 kWh 1460 kWh 2191 kWh £385 £219 £604 £6,511 10.8 yrs £5,561
5 kW 4564 kWh 1826 kWh 2738 kWh £481 £274 £754 £8,139 10.8 yrs £6,951
6 kW 5477 kWh 2191 kWh 3286 kWh £577 £329 £905 £9,767 10.8 yrs £8,341
7 kW 6389 kWh 2556 kWh 3834 kWh £673 £383 £1,056 £11,394 10.8 yrs £9,731
8 kW 7302 kWh 2921 kWh 4381 kWh £769 £438 £1,207 £13,022 10.8 yrs £11,122

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: £904, Upfront: £10,239, 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 1826 kWh 1095 kWh 730 kWh £288 £73 £361 £5,356 14.8 yrs £1,873
3 kW 2738 kWh 1643 kWh 1095 kWh £433 £110 £542 £6,983 12.9 yrs £3,859
4 kW 3651 kWh 2191 kWh 1460 kWh £577 £146 £723 £8,611 11.9 yrs £5,846
5 kW 4564 kWh 2738 kWh 1826 kWh £721 £183 £904 £10,239 11.3 yrs £7,832
6 kW 5477 kWh 3286 kWh 2191 kWh £865 £219 £1,084 £11,867 10.9 yrs £9,818
7 kW 6389 kWh 3834 kWh 2556 kWh £1,009 £256 £1,265 £13,494 10.7 yrs £11,805
8 kW 7302 kWh 4381 kWh 2921 kWh £1,154 £292 £1,446 £15,122 10.5 yrs £13,791

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: £978, Upfront: £11,639, Break-even: 11.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1826 kWh 1278 kWh 548 kWh £336 £55 £391 £6,756 17.3 yrs £1,069
3 kW 2738 kWh 1917 kWh 821 kWh £505 £82 £587 £8,383 14.3 yrs £3,354
4 kW 3651 kWh 2556 kWh 1095 kWh £673 £110 £782 £10,011 12.8 yrs £5,638
5 kW 4564 kWh 3195 kWh 1369 kWh £841 £137 £978 £11,639 11.9 yrs £7,923
6 kW 5477 kWh 3834 kWh 1643 kWh £1,009 £164 £1,174 £13,267 11.3 yrs £10,207
7 kW 6389 kWh 4473 kWh 1917 kWh £1,178 £192 £1,369 £14,894 10.9 yrs £12,492
8 kW 7302 kWh 5111 kWh 2191 kWh £1,346 £219 £1,565 £16,522 10.6 yrs £14,776

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: £1,000, Upfront: £13,389, Break-even: 13.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1826 kWh 1333 kWh 493 kWh £351 £49 £400 £8,506 21.3 yrs £-502
3 kW 2738 kWh 1999 kWh 739 kWh £526 £74 £600 £10,133 16.9 yrs £1,872
4 kW 3651 kWh 2665 kWh 986 kWh £702 £99 £800 £11,761 14.7 yrs £4,246
5 kW 4564 kWh 3332 kWh 1232 kWh £877 £123 £1,000 £13,389 13.4 yrs £6,620
6 kW 5477 kWh 3998 kWh 1479 kWh £1,053 £148 £1,201 £15,017 12.5 yrs £8,994
7 kW 6389 kWh 4664 kWh 1725 kWh £1,228 £173 £1,401 £16,644 11.9 yrs £11,368
8 kW 7302 kWh 5331 kWh 1972 kWh £1,404 £197 £1,601 £18,272 11.4 yrs £13,742

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: £1,015, Upfront: £15,139, 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 1826 kWh 1369 kWh 456 kWh £360 £46 £406 £10,256 25.3 yrs £-2,133
3 kW 2738 kWh 2054 kWh 685 kWh £541 £68 £609 £11,883 19.5 yrs £301
4 kW 3651 kWh 2738 kWh 913 kWh £721 £91 £812 £13,511 16.6 yrs £2,734
5 kW 4564 kWh 3423 kWh 1141 kWh £901 £114 £1,015 £15,139 14.9 yrs £5,168
6 kW 5477 kWh 4107 kWh 1369 kWh £1,081 £137 £1,218 £16,767 13.8 yrs £7,601
7 kW 6389 kWh 4792 kWh 1597 kWh £1,262 £160 £1,421 £18,394 12.9 yrs £10,035
8 kW 7302 kWh 5477 kWh 1826 kWh £1,442 £183 £1,625 £20,022 12.3 yrs £12,469

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: £1,030, Upfront: £17,589, Break-even: 17.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1826 kWh 1406 kWh 420 kWh £370 £42 £412 £12,706 30.8 yrs £-4,464
3 kW 2738 kWh 2108 kWh 630 kWh £555 £63 £618 £14,333 23.2 yrs £-1,970
4 kW 3651 kWh 2811 kWh 840 kWh £740 £84 £824 £15,961 19.4 yrs £523
5 kW 4564 kWh 3514 kWh 1050 kWh £925 £105 £1,030 £17,589 17.1 yrs £3,016
6 kW 5477 kWh 4217 kWh 1260 kWh £1,110 £126 £1,236 £19,217 15.5 yrs £5,509
7 kW 6389 kWh 4920 kWh 1470 kWh £1,295 £147 £1,442 £20,844 14.5 yrs £8,002
8 kW 7302 kWh 5623 kWh 1679 kWh £1,480 £168 £1,648 £22,472 13.6 yrs £10,495

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 Powys

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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This is a practical sanity-check request, not an instant quote promise. The Blue Ape quote route above remains available if you already want installer introductions.

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Insights for LD2

Figures below are tailored to LD2 — click through for full league tables.

Big-Roof Britain Rank #123 of 2182
6.4 kWp (UK avg 5.1 kWp)
~13 panels (≈430 W)
Solar Payback Index Rank #1792 of 2996
10.8 years (UK avg 10.8 years)
~£906 /yr • £9,767 upfront
Standing-Charge Drag Rank #1055 of 2996
23.3% (UK avg 26.6%) drag on savings
£211 fixed • ~£906 /yr value
Aspect Penalty View ranking →
East −18.4% West −19.0%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in LD2

Monthly generation per kilowatt of solar panels

kWh 31 Jan 47 Feb 80 Mar 106 Apr 116 May 113 Jun 112 Jul 100 Aug 85 Sep 58 Oct 38 Nov 26 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 45.6% 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 35 kWh per month; the average month produces around 76 kWh. So a typical 4 kW home system would generate roughly 139 kWh in winter, or 304 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
26.33p/kWh
Daily Fixed Charge
57.84p/day
Local Sunshine
913kWh/kW
A 1 kW system generates ~913 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: 69% • Flats: 11% • Bungalows: 18% Based on 1,390 properties

Coverage

Powys (100%)

Areas Covered

Builth, Llanafanfawr with Garth, Llanelwedd, Bronllys and Felin-fach, Disserth and Trecoed with Newbridge, Llandrindod South, Glasbury

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 South Wales

LD1 (Powys)
≈10.4 km away
Local sunshine: ~902 kWh/kWp · -1% vs LD2
LD4 (Powys)
≈11.0 km away
Local sunshine: ~903 kWh/kWp · -1% vs LD2
LD5 (Powys)
≈16.1 km away
Local sunshine: ~878 kWh/kWp · -4% vs LD2
LD6 (Powys)
≈18.5 km away
Local sunshine: ~903 kWh/kWp · -1% vs LD2
HR3 (Herefordshire, County of)
≈21.3 km away
Local sunshine: ~915 kWh/kWp · +0% vs LD2
LD3 (Powys)
≈22.4 km away
Local sunshine: ~876 kWh/kWp · -4% vs LD2

Similar sunshine across the UK

EH34 (East Lothian)
~913 kWh/kWp · -0% vs LD2
EH42 (East Lothian)
~913 kWh/kWp · +0% vs LD2
WA8 (Halton)
~912 kWh/kWp · -0% vs LD2