Solar explained to clever people by people who are not trying to be clever

Solar Panels in BT80 (Mid Ulster)

See if solar pays off for you in Mid Ulster — 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
38.9 years
After this, it's pure profit
Upfront Cost
£12,207
What you pay to get started
Annual Benefit
£314
What you save every year
Profit Over 25 Years
£-4,354
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

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 873 kWh per year on a south-facing roof. We value self-used electricity at 0.0p and exported surplus at a baseline 10p via SEG. Use the calculator above for your exact tariff.

Unit rate
0.0p/kWh
Standing charge
0.0p/day
Sunshine yield (south)
873 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: £262, Upfront: £10,173, Break-even: 38.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1745 kWh 698 kWh 1047 kWh £0 £105 £105 £4,069 38.9 yrs £-1,975
3 kW 2618 kWh 1047 kWh 1571 kWh £0 £157 £157 £6,104 38.9 yrs £-2,962
4 kW 3490 kWh 1396 kWh 2094 kWh £0 £209 £209 £8,138 38.9 yrs £-3,950
5 kW 4363 kWh 1745 kWh 2618 kWh £0 £262 £262 £10,173 38.9 yrs £-4,937
6 kW 5235 kWh 2094 kWh 3141 kWh £0 £314 £314 £12,207 38.9 yrs £-5,925
7 kW 6108 kWh 2443 kWh 3665 kWh £0 £366 £366 £14,242 38.9 yrs £-6,912
8 kW 6980 kWh 2792 kWh 4188 kWh £0 £419 £419 £16,276 38.9 yrs £-7,900

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: £175, Upfront: £12,273, Break-even: 70.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1745 kWh 1047 kWh 698 kWh £0 £70 £70 £6,169 88.4 yrs £-4,773
3 kW 2618 kWh 1571 kWh 1047 kWh £0 £105 £105 £8,204 78.4 yrs £-6,109
4 kW 3490 kWh 2094 kWh 1396 kWh £0 £140 £140 £10,238 73.3 yrs £-7,446
5 kW 4363 kWh 2618 kWh 1745 kWh £0 £175 £175 £12,273 70.3 yrs £-8,782
6 kW 5235 kWh 3141 kWh 2094 kWh £0 £209 £209 £14,307 68.3 yrs £-10,119
7 kW 6108 kWh 3665 kWh 2443 kWh £0 £244 £244 £16,342 66.9 yrs £-11,455
8 kW 6980 kWh 4188 kWh 2792 kWh £0 £279 £279 £18,376 65.8 yrs £-12,792

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: £131, Upfront: £13,673, Break-even: 104.5 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1745 kWh 1222 kWh 524 kWh £0 £52 £52 £7,569 144.6 yrs £-6,522
3 kW 2618 kWh 1832 kWh 785 kWh £0 £79 £79 £9,604 122.3 yrs £-8,033
4 kW 3490 kWh 2443 kWh 1047 kWh £0 £105 £105 £11,638 111.2 yrs £-9,544
5 kW 4363 kWh 3054 kWh 1309 kWh £0 £131 £131 £13,673 104.5 yrs £-11,055
6 kW 5235 kWh 3665 kWh 1571 kWh £0 £157 £157 £15,707 100.0 yrs £-12,566
7 kW 6108 kWh 4275 kWh 1832 kWh £0 £183 £183 £17,742 96.8 yrs £-14,077
8 kW 6980 kWh 4886 kWh 2094 kWh £0 £209 £209 £19,776 94.4 yrs £-15,588

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: £118, Upfront: £15,423, Break-even: 130.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1745 kWh 1274 kWh 471 kWh £0 £47 £47 £9,319 197.8 yrs £-8,377
3 kW 2618 kWh 1911 kWh 707 kWh £0 £71 £71 £11,354 160.6 yrs £-9,940
4 kW 3490 kWh 2548 kWh 942 kWh £0 £94 £94 £13,388 142.1 yrs £-11,503
5 kW 4363 kWh 3185 kWh 1178 kWh £0 £118 £118 £15,423 130.9 yrs £-13,067
6 kW 5235 kWh 3822 kWh 1413 kWh £0 £141 £141 £17,457 123.5 yrs £-14,630
7 kW 6108 kWh 4459 kWh 1649 kWh £0 £165 £165 £19,492 118.2 yrs £-16,193
8 kW 6980 kWh 5096 kWh 1885 kWh £0 £188 £188 £21,526 114.2 yrs £-17,757

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: £109, Upfront: £17,173, Break-even: 157.5 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1745 kWh 1309 kWh 436 kWh £0 £44 £44 £11,069 253.7 yrs £-10,196
3 kW 2618 kWh 1963 kWh 654 kWh £0 £65 £65 £13,104 200.2 yrs £-11,795
4 kW 3490 kWh 2618 kWh 873 kWh £0 £87 £87 £15,138 173.5 yrs £-13,393
5 kW 4363 kWh 3272 kWh 1091 kWh £0 £109 £109 £17,173 157.5 yrs £-14,991
6 kW 5235 kWh 3926 kWh 1309 kWh £0 £131 £131 £19,207 146.8 yrs £-16,589
7 kW 6108 kWh 4581 kWh 1527 kWh £0 £153 £153 £21,242 139.1 yrs £-18,188
8 kW 6980 kWh 5235 kWh 1745 kWh £0 £175 £175 £23,276 133.4 yrs £-19,786

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: £100, Upfront: £19,623, Break-even: 195.6 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1745 kWh 1344 kWh 401 kWh £0 £40 £40 £13,519 336.8 yrs £-12,716
3 kW 2618 kWh 2016 kWh 602 kWh £0 £60 £60 £15,554 258.3 yrs £-14,349
4 kW 3490 kWh 2687 kWh 803 kWh £0 £80 £80 £17,588 219.1 yrs £-15,983
5 kW 4363 kWh 3359 kWh 1003 kWh £0 £100 £100 £19,623 195.6 yrs £-17,616
6 kW 5235 kWh 4031 kWh 1204 kWh £0 £120 £120 £21,657 179.9 yrs £-19,249
7 kW 6108 kWh 4703 kWh 1405 kWh £0 £140 £140 £23,692 168.7 yrs £-20,882
8 kW 6980 kWh 5375 kWh 1605 kWh £0 £161 £161 £25,726 160.2 yrs £-22,515

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.

Your Area at a Glance

Your Electricity Rate
0.00p/kWh
Daily Fixed Charge
0.00p/day
Local Sunshine
873kWh/kW
A 1 kW system generates ~873 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

No EPC data available for this outcode

Coverage

Mid Ulster (100%)

Areas Covered

Oaklands, Cookstown East, Loughry, Cookstown West, Coagh, Cookstown South, Lissan, Stewartstown + 4 more

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.