Solar panel cost in Powys (LD8)

See realistic solar installation costs, savings and payback for LD8 (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

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System Size

Roof Direction

Battery Storage

Export Value

Your Numbers

Break-even
10.6 years
After this, it's pure profit
Upfront Cost
£9,767
What you pay to get started
Annual Benefit
£923
What you save every year
Profit Over 25 Years
£13,316
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

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 954 kWh per year on a south-facing roof. We value self-used electricity at 25.3p and exported surplus at a baseline 10p via SEG. Use the calculator above for your exact tariff.

Unit rate
25.3p/kWh
Standing charge
59.7p/day
Sunshine yield (south)
954 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: £769, Upfront: £8,139, Break-even: 10.6 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1908 kWh 763 kWh 1145 kWh £193 £114 £308 £3,256 10.6 yrs £2,900
3 kW 2862 kWh 1145 kWh 1717 kWh £290 £172 £462 £4,883 10.6 yrs £4,350
4 kW 3816 kWh 1526 kWh 2289 kWh £387 £229 £616 £6,511 10.6 yrs £5,800
5 kW 4770 kWh 1908 kWh 2862 kWh £483 £286 £769 £8,139 10.6 yrs £7,250
6 kW 5723 kWh 2289 kWh 3434 kWh £580 £343 £923 £9,767 10.6 yrs £8,699
7 kW 6677 kWh 2671 kWh 4006 kWh £677 £401 £1,077 £11,394 10.6 yrs £10,149
8 kW 7631 kWh 3052 kWh 4579 kWh £773 £458 £1,231 £13,022 10.6 yrs £11,599

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: £916, Upfront: £10,239, Break-even: 11.2 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1908 kWh 1145 kWh 763 kWh £290 £76 £366 £5,356 14.6 yrs £1,970
3 kW 2862 kWh 1717 kWh 1145 kWh £435 £114 £549 £6,983 12.7 yrs £4,005
4 kW 3816 kWh 2289 kWh 1526 kWh £580 £153 £733 £8,611 11.8 yrs £6,039
5 kW 4770 kWh 2862 kWh 1908 kWh £725 £191 £916 £10,239 11.2 yrs £8,074
6 kW 5723 kWh 3434 kWh 2289 kWh £870 £229 £1,099 £11,867 10.8 yrs £10,109
7 kW 6677 kWh 4006 kWh 2671 kWh £1,015 £267 £1,282 £13,494 10.5 yrs £12,144
8 kW 7631 kWh 4579 kWh 3052 kWh £1,160 £305 £1,465 £15,122 10.3 yrs £14,179

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: £989, Upfront: £11,639, Break-even: 11.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1908 kWh 1335 kWh 572 kWh £338 £57 £396 £6,756 17.1 yrs £1,155
3 kW 2862 kWh 2003 kWh 859 kWh £507 £86 £593 £8,383 14.1 yrs £3,482
4 kW 3816 kWh 2671 kWh 1145 kWh £677 £114 £791 £10,011 12.7 yrs £5,809
5 kW 4770 kWh 3339 kWh 1431 kWh £846 £143 £989 £11,639 11.8 yrs £8,137
6 kW 5723 kWh 4006 kWh 1717 kWh £1,015 £172 £1,187 £13,267 11.2 yrs £10,464
7 kW 6677 kWh 4674 kWh 2003 kWh £1,184 £200 £1,384 £14,894 10.8 yrs £12,791
8 kW 7631 kWh 5342 kWh 2289 kWh £1,353 £229 £1,582 £16,522 10.4 yrs £15,118

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: £1,011, Upfront: £13,389, 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 1908 kWh 1393 kWh 515 kWh £353 £52 £404 £8,506 21.0 yrs £-420
3 kW 2862 kWh 2089 kWh 773 kWh £529 £77 £606 £10,133 16.7 yrs £1,995
4 kW 3816 kWh 2785 kWh 1030 kWh £706 £103 £809 £11,761 14.5 yrs £4,410
5 kW 4770 kWh 3482 kWh 1288 kWh £882 £129 £1,011 £13,389 13.2 yrs £6,825
6 kW 5723 kWh 4178 kWh 1545 kWh £1,058 £155 £1,213 £15,017 12.4 yrs £9,240
7 kW 6677 kWh 4874 kWh 1803 kWh £1,235 £180 £1,415 £16,644 11.8 yrs £11,655
8 kW 7631 kWh 5571 kWh 2060 kWh £1,411 £206 £1,617 £18,272 11.3 yrs £14,070

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: £1,025, Upfront: £15,139, 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 1908 kWh 1431 kWh 477 kWh £362 £48 £410 £10,256 25.0 yrs £-2,053
3 kW 2862 kWh 2146 kWh 715 kWh £544 £72 £615 £11,883 19.3 yrs £421
4 kW 3816 kWh 2862 kWh 954 kWh £725 £95 £820 £13,511 16.5 yrs £2,894
5 kW 4770 kWh 3577 kWh 1192 kWh £906 £119 £1,025 £15,139 14.8 yrs £5,368
6 kW 5723 kWh 4293 kWh 1431 kWh £1,087 £143 £1,230 £16,767 13.6 yrs £7,841
7 kW 6677 kWh 5008 kWh 1669 kWh £1,269 £167 £1,435 £18,394 12.8 yrs £10,315
8 kW 7631 kWh 5723 kWh 1908 kWh £1,450 £191 £1,641 £20,022 12.2 yrs £12,788

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: £1,040, Upfront: £17,589, Break-even: 16.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1908 kWh 1469 kWh 439 kWh £372 £44 £416 £12,706 30.5 yrs £-4,386
3 kW 2862 kWh 2204 kWh 658 kWh £558 £66 £624 £14,333 23.0 yrs £-1,854
4 kW 3816 kWh 2938 kWh 878 kWh £744 £88 £832 £15,961 19.2 yrs £678
5 kW 4770 kWh 3673 kWh 1097 kWh £930 £110 £1,040 £17,589 16.9 yrs £3,210
6 kW 5723 kWh 4407 kWh 1316 kWh £1,116 £132 £1,248 £19,217 15.4 yrs £5,742
7 kW 6677 kWh 5142 kWh 1536 kWh £1,302 £154 £1,456 £20,844 14.3 yrs £8,274
8 kW 7631 kWh 5876 kWh 1755 kWh £1,488 £176 £1,664 £22,472 13.5 yrs £10,806

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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Seasonal solar output in LD8

Monthly generation per kilowatt of solar panels

kWh 35 Jan 51 Feb 83 Mar 109 Apr 120 May 116 Jun 117 Jul 104 Aug 88 Sep 60 Oct 41 Nov 31 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 48.7% 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 39 kWh per month; the average month produces around 79 kWh. So a typical 4 kW home system would generate roughly 155 kWh in winter, or 318 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
25.33p/kWh
Daily Fixed Charge
59.71p/day
Local Sunshine
954kWh/kW
A 1 kW system generates ~954 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: 6% • Bungalows: 23% Based on 1,198 properties

Coverage

Powys (87%)|Herefordshire, County of (13%)

Areas Covered

Presteigne, Old Radnor, Llangunllo with Norton, Mortimer, Arrow, Knighton with Beguildy, Llandrindod South, Kington

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.