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

Solar Panels in NE63 (Northumberland)

See if solar pays off for you in Northumberland — 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
13.3 years
After this, it's pure profit
Upfront Cost
£10,173
What you pay to get started
Annual Benefit
£764
What you save every year
Profit Over 25 Years
£8,935
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 5.0 kW, with most eligible homes comfortably fitting within 3–6 kW. Each kilowatt of panels produces roughly 945 kWh per year on a south-facing roof. We value self-used electricity at 25.4p and exported surplus at a baseline 10p via SEG. Use the calculator above for your exact tariff.

Unit rate
25.4p/kWh
Standing charge
59.9p/day
Sunshine yield (south)
945 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: £764, Upfront: £10,173, Break-even: 13.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1890 kWh 756 kWh 1134 kWh £192 £113 £306 £4,069 13.3 yrs £2,045
3 kW 2836 kWh 1134 kWh 1701 kWh £288 £170 £459 £6,104 13.3 yrs £3,068
4 kW 3781 kWh 1512 kWh 2269 kWh £385 £227 £611 £8,138 13.3 yrs £4,091
5 kW 4726 kWh 1890 kWh 2836 kWh £481 £284 £764 £10,173 13.3 yrs £5,113
6 kW 5671 kWh 2269 kWh 3403 kWh £577 £340 £917 £12,207 13.3 yrs £6,136
7 kW 6616 kWh 2647 kWh 3970 kWh £673 £397 £1,070 £14,242 13.3 yrs £7,159
8 kW 7562 kWh 3025 kWh 4537 kWh £769 £454 £1,223 £16,276 13.3 yrs £8,181

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: £910, Upfront: £12,273, 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 1890 kWh 1134 kWh 756 kWh £288 £76 £364 £6,169 16.9 yrs £1,112
3 kW 2836 kWh 1701 kWh 1134 kWh £433 £113 £546 £8,204 15.0 yrs £2,718
4 kW 3781 kWh 2269 kWh 1512 kWh £577 £151 £728 £10,238 14.1 yrs £4,324
5 kW 4726 kWh 2836 kWh 1890 kWh £721 £189 £910 £12,273 13.5 yrs £5,930
6 kW 5671 kWh 3403 kWh 2269 kWh £865 £227 £1,092 £14,307 13.1 yrs £7,536
7 kW 6616 kWh 3970 kWh 2647 kWh £1,010 £265 £1,274 £16,342 12.8 yrs £9,142
8 kW 7562 kWh 4537 kWh 3025 kWh £1,154 £302 £1,456 £18,376 12.6 yrs £10,748

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: £983, Upfront: £13,673, Break-even: 13.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1890 kWh 1323 kWh 567 kWh £337 £57 £393 £7,569 19.2 yrs £296
3 kW 2836 kWh 1985 kWh 851 kWh £505 £85 £590 £9,604 16.3 yrs £2,193
4 kW 3781 kWh 2647 kWh 1134 kWh £673 £113 £786 £11,638 14.8 yrs £4,091
5 kW 4726 kWh 3308 kWh 1418 kWh £841 £142 £983 £13,673 13.9 yrs £5,989
6 kW 5671 kWh 3970 kWh 1701 kWh £1,010 £170 £1,180 £15,707 13.3 yrs £7,887
7 kW 6616 kWh 4632 kWh 1985 kWh £1,178 £198 £1,376 £17,742 12.9 yrs £9,784
8 kW 7562 kWh 5293 kWh 2269 kWh £1,346 £227 £1,573 £19,776 12.6 yrs £11,682

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: £1,005, Upfront: £15,423, Break-even: 15.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1890 kWh 1380 kWh 510 kWh £351 £51 £402 £9,319 23.2 yrs £-1,279
3 kW 2836 kWh 2070 kWh 766 kWh £526 £77 £603 £11,354 18.8 yrs £706
4 kW 3781 kWh 2760 kWh 1021 kWh £702 £102 £804 £13,388 16.7 yrs £2,691
5 kW 4726 kWh 3450 kWh 1276 kWh £877 £128 £1,005 £15,423 15.3 yrs £4,676
6 kW 5671 kWh 4140 kWh 1531 kWh £1,053 £153 £1,206 £17,457 14.5 yrs £6,662
7 kW 6616 kWh 4830 kWh 1786 kWh £1,228 £179 £1,407 £19,492 13.9 yrs £8,647
8 kW 7562 kWh 5520 kWh 2042 kWh £1,404 £204 £1,608 £21,526 13.4 yrs £10,632

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: £1,020, Upfront: £17,173, Break-even: 16.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1890 kWh 1418 kWh 473 kWh £361 £47 £408 £11,069 27.1 yrs £-2,913
3 kW 2836 kWh 2127 kWh 709 kWh £541 £71 £612 £13,104 21.4 yrs £-869
4 kW 3781 kWh 2836 kWh 945 kWh £721 £95 £816 £15,138 18.6 yrs £1,174
5 kW 4726 kWh 3545 kWh 1182 kWh £901 £118 £1,020 £17,173 16.8 yrs £3,218
6 kW 5671 kWh 4253 kWh 1418 kWh £1,082 £142 £1,223 £19,207 15.7 yrs £5,262
7 kW 6616 kWh 4962 kWh 1654 kWh £1,262 £165 £1,427 £21,242 14.9 yrs £7,305
8 kW 7562 kWh 5671 kWh 1890 kWh £1,442 £189 £1,631 £23,276 14.3 yrs £9,349

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: £1,034, Upfront: £19,623, Break-even: 19.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1890 kWh 1456 kWh 435 kWh £370 £43 £414 £13,519 32.7 yrs £-5,246
3 kW 2836 kWh 2183 kWh 652 kWh £555 £65 £620 £15,554 25.1 yrs £-3,144
4 kW 3781 kWh 2911 kWh 870 kWh £740 £87 £827 £17,588 21.3 yrs £-1,042
5 kW 4726 kWh 3639 kWh 1087 kWh £925 £109 £1,034 £19,623 19.0 yrs £1,060
6 kW 5671 kWh 4367 kWh 1304 kWh £1,110 £130 £1,241 £21,657 17.5 yrs £3,162
7 kW 6616 kWh 5095 kWh 1522 kWh £1,296 £152 £1,448 £23,692 16.4 yrs £5,264
8 kW 7562 kWh 5822 kWh 1739 kWh £1,481 £174 £1,655 £25,726 15.5 yrs £7,365

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
25.43p/kWh
Daily Fixed Charge
59.86p/day
Local Sunshine
945kWh/kW
A 1 kW system generates ~945 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: 75% • Flats: 18% • Bungalows: 7% Based on 8,055 properties

Coverage

Northumberland (100%)

Areas Covered

College with North Seaton, Ashington Central, Hirst, Bothal, Haydon, Seaton with Spital, Newbiggin-by-the-Sea

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.