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Big Roof Britain Solar Payback Index Standing Charge Drag

Solar Panels in LE15 (Rutland)

See if solar pays off for you in Rutland — 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
12.7 years
After this, it's pure profit
Upfront Cost
£10,173
What you pay to get started
Annual Benefit
£799
What you save every year
Profit Over 25 Years
£9,808
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

In East Midlands, the current unit rate is 25.55p/kWh with a 49.09p/day standing charge. Your postcode’s south-facing sunshine yield is 985 kWh/kW — 17 above the regional median (968).

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 985 kWh per year on a south-facing roof. We value self-used electricity at 25.6p and exported surplus at a baseline 10p via SEG. Use the calculator above for your exact tariff.

Unit rate
25.6p/kWh
Standing charge
49.1p/day
Sunshine yield (south)
985 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: £799, Upfront: £10,173, 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 1971 kWh 788 kWh 1183 kWh £201 £118 £320 £4,069 12.7 yrs £2,325
3 kW 2956 kWh 1183 kWh 1774 kWh £302 £177 £480 £6,104 12.7 yrs £3,487
4 kW 3942 kWh 1577 kWh 2365 kWh £403 £237 £639 £8,138 12.7 yrs £4,649
5 kW 4927 kWh 1971 kWh 2956 kWh £504 £296 £799 £10,173 12.7 yrs £5,812
6 kW 5913 kWh 2365 kWh 3548 kWh £604 £355 £959 £12,207 12.7 yrs £6,974
7 kW 6898 kWh 2759 kWh 4139 kWh £705 £414 £1,119 £14,242 12.7 yrs £8,136
8 kW 7884 kWh 3153 kWh 4730 kWh £806 £473 £1,279 £16,276 12.7 yrs £9,299

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: £952, Upfront: £12,273, Break-even: 12.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1971 kWh 1183 kWh 788 kWh £302 £79 £381 £6,169 16.2 yrs £1,451
3 kW 2956 kWh 1774 kWh 1183 kWh £453 £118 £571 £8,204 14.4 yrs £3,226
4 kW 3942 kWh 2365 kWh 1577 kWh £604 £158 £762 £10,238 13.4 yrs £5,001
5 kW 4927 kWh 2956 kWh 1971 kWh £755 £197 £952 £12,273 12.9 yrs £6,776
6 kW 5913 kWh 3548 kWh 2365 kWh £906 £237 £1,143 £14,307 12.5 yrs £8,552
7 kW 6898 kWh 4139 kWh 2759 kWh £1,057 £276 £1,333 £16,342 12.3 yrs £10,327
8 kW 7884 kWh 4730 kWh 3153 kWh £1,209 £315 £1,524 £18,376 12.1 yrs £12,102

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: £1,029, Upfront: £13,673, 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 1971 kWh 1380 kWh 591 kWh £352 £59 £412 £7,569 18.4 yrs £664
3 kW 2956 kWh 2069 kWh 887 kWh £529 £89 £617 £9,604 15.6 yrs £2,745
4 kW 3942 kWh 2759 kWh 1183 kWh £705 £118 £823 £11,638 14.1 yrs £4,827
5 kW 4927 kWh 3449 kWh 1478 kWh £881 £148 £1,029 £13,673 13.3 yrs £6,909
6 kW 5913 kWh 4139 kWh 1774 kWh £1,057 £177 £1,235 £15,707 12.7 yrs £8,991
7 kW 6898 kWh 4829 kWh 2069 kWh £1,234 £207 £1,441 £17,742 12.3 yrs £11,072
8 kW 7884 kWh 5519 kWh 2365 kWh £1,410 £237 £1,647 £19,776 12.0 yrs £13,154

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: £1,052, Upfront: £15,423, Break-even: 14.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1971 kWh 1439 kWh 532 kWh £368 £53 £421 £9,319 22.1 yrs £-903
3 kW 2956 kWh 2158 kWh 798 kWh £551 £80 £631 £11,354 18.0 yrs £1,271
4 kW 3942 kWh 2878 kWh 1064 kWh £735 £106 £842 £13,388 15.9 yrs £3,445
5 kW 4927 kWh 3597 kWh 1330 kWh £919 £133 £1,052 £15,423 14.7 yrs £5,618
6 kW 5913 kWh 4316 kWh 1596 kWh £1,103 £160 £1,262 £17,457 13.8 yrs £7,792
7 kW 6898 kWh 5036 kWh 1863 kWh £1,287 £186 £1,473 £19,492 13.2 yrs £9,966
8 kW 7884 kWh 5755 kWh 2129 kWh £1,470 £213 £1,683 £21,526 12.8 yrs £12,140

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: £1,067, Upfront: £17,173, Break-even: 16.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1971 kWh 1478 kWh 493 kWh £378 £49 £427 £11,069 25.9 yrs £-2,530
3 kW 2956 kWh 2217 kWh 739 kWh £567 £74 £640 £13,104 20.5 yrs £-295
4 kW 3942 kWh 2956 kWh 985 kWh £755 £99 £854 £15,138 17.7 yrs £1,940
5 kW 4927 kWh 3695 kWh 1232 kWh £944 £123 £1,067 £17,173 16.1 yrs £4,175
6 kW 5913 kWh 4435 kWh 1478 kWh £1,133 £148 £1,281 £19,207 15.0 yrs £6,410
7 kW 6898 kWh 5174 kWh 1725 kWh £1,322 £172 £1,494 £21,242 14.2 yrs £8,645
8 kW 7884 kWh 5913 kWh 1971 kWh £1,511 £197 £1,708 £23,276 13.6 yrs £10,880

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: £1,083, Upfront: £19,623, Break-even: 18.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1971 kWh 1518 kWh 453 kWh £388 £45 £433 £13,519 31.2 yrs £-4,857
3 kW 2956 kWh 2276 kWh 680 kWh £582 £68 £650 £15,554 23.9 yrs £-2,561
4 kW 3942 kWh 3035 kWh 907 kWh £775 £91 £866 £17,588 20.3 yrs £-265
5 kW 4927 kWh 3794 kWh 1133 kWh £969 £113 £1,083 £19,623 18.1 yrs £2,031
6 kW 5913 kWh 4553 kWh 1360 kWh £1,163 £136 £1,299 £21,657 16.7 yrs £4,328
7 kW 6898 kWh 5312 kWh 1587 kWh £1,357 £159 £1,516 £23,692 15.6 yrs £6,624
8 kW 7884 kWh 6070 kWh 1813 kWh £1,551 £181 £1,732 £25,726 14.9 yrs £8,920

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.

Insights for LE15

Figures below are tailored to LE15 — click through for full league tables.

Big-Roof Britain Rank #648 of 2182
5.4 kWp (UK avg 5.1 kWp)
~11 panels (≈430 W)
Solar Payback Index Rank #1399 of 2997
11.1 years (UK avg 11.3 years)
~£914 /yr • £10,173 upfront
Standing-Charge Drag Rank #1326 of 2997
19.6% (UK avg 21.7%) drag on savings
£179 fixed • ~£914 /yr value

Your Area at a Glance

Your Electricity Rate
25.55p/kWh
Daily Fixed Charge
49.09p/day
Local Sunshine
985kWh/kW
A 1 kW system generates ~985 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: 78% • Flats: 11% • Bungalows: 10% Based on 9,460 properties

Coverage

Rutland (97%)|Harborough (1%)|Melton (1%)

Areas Covered

Oakham North East, Uppingham, Oakham South, Braunston & Martinsthorpe, Normanton, Cottesmore, Barleythorpe, Exton + 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.

Compare nearby areas

Nearby in East Midlands

LE13 (Melton)
≈15.2 km away
Local sunshine: ~984 kWh/kWp · -0% vs LE15
LE14 (Melton)
≈16.4 km away
Local sunshine: ~993 kWh/kWp · +1% vs LE15
PE9 (South Kesteven)
≈16.7 km away
Local sunshine: ~1,007 kWh/kWp · +2% vs LE15
NG33 (South Kesteven)
≈17.5 km away
Local sunshine: ~1,000 kWh/kWp · +1% vs LE15
NN17 (North Northamptonshire)
≈19.6 km away
Local sunshine: ~995 kWh/kWp · +1% vs LE15
NN18 (North Northamptonshire)
≈21.2 km away
Local sunshine: ~992 kWh/kWp · +1% vs LE15

Similar sunshine across the UK

GL54 (Cotswold)
~985 kWh/kWp · -0% vs LE15
WC1X (Camden)
~986 kWh/kWp · +0% vs LE15
EC1P (Islington)
~986 kWh/kWp · +0% vs LE15