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Solar panel cost in Powys (SY16)

See realistic solar installation costs, savings and payback for SY16 (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
10.4 years
After this, it's pure profit
Upfront Cost
£8,139
What you pay to get started
Annual Benefit
£785
What you save every year
Profit Over 25 Years
£11,479
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 North Wales and Mersey, the current unit rate is 27.66p/kWh with a 70.76p/day standing charge. Your postcode’s south-facing sunshine yield is 920 kWh/kW — 10 below the regional median (930).

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 920 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
70.8p/day
Sunshine yield (south)
920 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: £785, Upfront: £8,139, Break-even: 10.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1839 kWh 736 kWh 1104 kWh £204 £110 £314 £3,256 10.4 yrs £3,022
3 kW 2759 kWh 1104 kWh 1655 kWh £305 £166 £471 £4,883 10.4 yrs £4,533
4 kW 3679 kWh 1472 kWh 2207 kWh £407 £221 £628 £6,511 10.4 yrs £6,044
5 kW 4599 kWh 1839 kWh 2759 kWh £509 £276 £785 £8,139 10.4 yrs £7,555
6 kW 5518 kWh 2207 kWh 3311 kWh £611 £331 £942 £9,767 10.4 yrs £9,066
7 kW 6438 kWh 2575 kWh 3863 kWh £712 £386 £1,099 £11,394 10.4 yrs £10,577
8 kW 7358 kWh 2943 kWh 4415 kWh £814 £441 £1,256 £13,022 10.4 yrs £12,088

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: £947, Upfront: £10,239, 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 1839 kWh 1104 kWh 736 kWh £305 £74 £379 £5,356 14.1 yrs £2,221
3 kW 2759 kWh 1655 kWh 1104 kWh £458 £110 £568 £6,983 12.3 yrs £4,382
4 kW 3679 kWh 2207 kWh 1472 kWh £611 £147 £758 £8,611 11.4 yrs £6,543
5 kW 4599 kWh 2759 kWh 1839 kWh £763 £184 £947 £10,239 10.8 yrs £8,704
6 kW 5518 kWh 3311 kWh 2207 kWh £916 £221 £1,137 £11,867 10.4 yrs £10,864
7 kW 6438 kWh 3863 kWh 2575 kWh £1,068 £258 £1,326 £13,494 10.2 yrs £13,025
8 kW 7358 kWh 4415 kWh 2943 kWh £1,221 £294 £1,515 £15,122 10.0 yrs £15,186

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: £1,028, Upfront: £11,639, 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 1839 kWh 1288 kWh 552 kWh £356 £55 £411 £6,756 16.4 yrs £1,471
3 kW 2759 kWh 1931 kWh 828 kWh £534 £83 £617 £8,383 13.6 yrs £3,957
4 kW 3679 kWh 2575 kWh 1104 kWh £712 £110 £823 £10,011 12.2 yrs £6,442
5 kW 4599 kWh 3219 kWh 1380 kWh £890 £138 £1,028 £11,639 11.3 yrs £8,928
6 kW 5518 kWh 3863 kWh 1655 kWh £1,068 £166 £1,234 £13,267 10.8 yrs £11,413
7 kW 6438 kWh 4507 kWh 1931 kWh £1,247 £193 £1,440 £14,894 10.3 yrs £13,899
8 kW 7358 kWh 5150 kWh 2207 kWh £1,425 £221 £1,645 £16,522 10.0 yrs £16,384

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: £1,053, Upfront: £13,389, Break-even: 12.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1839 kWh 1343 kWh 497 kWh £371 £50 £421 £8,506 20.2 yrs £-84
3 kW 2759 kWh 2014 kWh 745 kWh £557 £74 £632 £10,133 16.0 yrs £2,499
4 kW 3679 kWh 2686 kWh 993 kWh £743 £99 £842 £11,761 14.0 yrs £5,082
5 kW 4599 kWh 3357 kWh 1242 kWh £929 £124 £1,053 £13,389 12.7 yrs £7,665
6 kW 5518 kWh 4028 kWh 1490 kWh £1,114 £149 £1,263 £15,017 11.9 yrs £10,248
7 kW 6438 kWh 4700 kWh 1738 kWh £1,300 £174 £1,474 £16,644 11.3 yrs £12,831
8 kW 7358 kWh 5371 kWh 1987 kWh £1,486 £199 £1,684 £18,272 10.8 yrs £15,414

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: £1,069, Upfront: £15,139, Break-even: 14.2 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1839 kWh 1380 kWh 460 kWh £382 £46 £428 £10,256 24.0 yrs £-1,704
3 kW 2759 kWh 2069 kWh 690 kWh £572 £69 £641 £11,883 18.5 yrs £944
4 kW 3679 kWh 2759 kWh 920 kWh £763 £92 £855 £13,511 15.8 yrs £3,592
5 kW 4599 kWh 3449 kWh 1150 kWh £954 £115 £1,069 £15,139 14.2 yrs £6,240
6 kW 5518 kWh 4139 kWh 1380 kWh £1,145 £138 £1,283 £16,767 13.1 yrs £8,888
7 kW 6438 kWh 4828 kWh 1609 kWh £1,336 £161 £1,497 £18,394 12.3 yrs £11,536
8 kW 7358 kWh 5518 kWh 1839 kWh £1,526 £184 £1,710 £20,022 11.7 yrs £14,184

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: £1,085, Upfront: £17,589, Break-even: 16.2 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1839 kWh 1416 kWh 423 kWh £392 £42 £434 £12,706 29.3 yrs £-4,024
3 kW 2759 kWh 2125 kWh 635 kWh £588 £63 £651 £14,333 22.0 yrs £-1,311
4 kW 3679 kWh 2833 kWh 846 kWh £784 £85 £868 £15,961 18.4 yrs £1,402
5 kW 4599 kWh 3541 kWh 1058 kWh £979 £106 £1,085 £17,589 16.2 yrs £4,115
6 kW 5518 kWh 4249 kWh 1269 kWh £1,175 £127 £1,302 £19,217 14.8 yrs £6,828
7 kW 6438 kWh 4957 kWh 1481 kWh £1,371 £148 £1,519 £20,844 13.7 yrs £9,541
8 kW 7358 kWh 5665 kWh 1692 kWh £1,567 £169 £1,736 £22,472 12.9 yrs £12,254

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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Check what MCS certification means

Understand DNO, G98 and G99 export limits

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Want a quote sanity check for SY16?

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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 SY16

Figures below are tailored to SY16 — click through for full league tables.

Big-Roof Britain Rank #866 of 2182
5.2 kWp (UK avg 5.1 kWp)
~11 panels (≈430 W)
Solar Payback Index Rank #1492 of 2996
10.4 years (UK avg 10.8 years)
~£785 /yr • £8,139 upfront
Standing-Charge Drag Rank #2528 of 2996
32.9% (UK avg 26.6%) drag on savings
£258 fixed • ~£785 /yr value
Aspect Penalty View ranking →
East −18.4% West −19.6%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in SY16

Monthly generation per kilowatt of solar panels

kWh 30 Jan 46 Feb 79 Mar 108 Apr 117 May 115 Jun 114 Jul 102 Aug 85 Sep 59 Oct 38 Nov 26 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 44.4% 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 34 kWh per month; the average month produces around 77 kWh. So a typical 4 kW home system would generate roughly 136 kWh in winter, or 307 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
27.66p/kWh
Daily Fixed Charge
70.76p/day
Local Sunshine
920kWh/kW
A 1 kW system generates ~920 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: 69% • Flats: 18% • Bungalows: 12% Based on 4,574 properties

Coverage

Powys (100%)

Areas Covered

Newtown East, Newtown Central and South, Rhiwcynon, Kerry, Newtown West, Newtown North, Llandinam with Dolfor, Dolforwyn + 2 more

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 North Wales and Mersey

SY17 (Powys)
≈8.6 km away
Local sunshine: ~890 kWh/kWp · -3% vs SY16
SY15 (Powys)
≈12.5 km away
Local sunshine: ~938 kWh/kWp · +2% vs SY16
SY18 (Powys)
≈16.9 km away
Local sunshine: ~888 kWh/kWp · -3% vs SY16
SY21 (Powys)
≈19.7 km away
Local sunshine: ~918 kWh/kWp · -0% vs SY16
SY19 (Powys)
≈23.2 km away
Local sunshine: ~892 kWh/kWp · -3% vs SY16
SY22 (Powys)
≈29.5 km away
Local sunshine: ~926 kWh/kWp · +1% vs SY16

Similar sunshine across the UK

S3 (Sheffield)
~920 kWh/kWp · +0% vs SY16
ST17 (Stafford)
~920 kWh/kWp · +0% vs SY16
CA28 (Cumberland)
~920 kWh/kWp · +0% vs SY16