Solar panels in St Albans, East of England
Roofs in St Albans get about 1,026 hours of usable sunlight a year — less than 90% of the cities we've measured. Here's what that means in cost, savings and payback, using real rooftop data rather than a national average.
Check your specific roof in St Albans → City averages are a starting point; your own roof's size, pitch and shading change the answer a lot.
What a typical St Albans solar system costs
A 8-panel system (3.2 kW) is about right for an average St Albans home using 2,500 kWh a year. It would produce roughly 2,791 kWh annually and offset 100% of that usage.
| System | Size | kWh/yr | Net cost | Saves/yr | Payback |
|---|---|---|---|---|---|
| 8 panels | 3.2 kW | 2,791 | £5,440 | £458 | 11.9 yrs |
| 12 panels | 4.8 kW | 4,186 | £8,160 | £626 | 13 yrs |
| 16 panels | 6.4 kW | 5,581 | £10,880 | £793 | 13.7 yrs |
| 20 panels | 8 kW | 6,977 | £13,600 | £961 | 14.2 yrs |
| 26 panels | 10.4 kW | 9,070 | £17,680 | £1,212 | 14.6 yrs |
How we worked this out for St Albans
Every number on this page comes from these seven steps. Nothing is a national average — the sunlight figure is measured from St Albans rooftops.
| # | Step | Result |
|---|---|---|
| 1 | What one panel makes here 400W ÷ 1000 × 1,026 sun hrs × 0.85 system losses |
349 kWh/yr |
| 2 | Panels needed to cover typical usage 2,500 kWh ÷ 349 kWh per panel |
8 panels |
| 3 | System size 8 panels × 400W |
3.20 kW |
| 4 | Annual production 3.20 kW × 1,026 hrs × 0.85 |
2,791 kWh/yr |
| 5 | Installed cost 3,200 W × £1.70 per watt (VAT is 0% on UK installs) |
£5,440 |
| 6 | Annual saving 875 kWh used as generated × 26.1p + 1,916 kWh exported × 12p |
£458/yr |
| 7 | Payback £5,440 ÷ £458 per year |
11.9 years |
Step 6 is where most calculators quietly overstate things. Only 31% of what a system this size produces in St Albans is used the moment it is generated; the other 1,916 kWh is exported and paid at the Smart Export Guarantee rate, not your import price. Valuing every kWh at the full 26.1p retail rate — which many calculators do — would show a payback of 7.5 years instead of the 11.9 we show. That 4.4-year difference is the single biggest reason our figures look worse than other sites' for St Albans.
Assumptions: 400W panels, 15% system losses (inverter, wiring, heat, soiling), £1.70/W installed, 2,500 kWh typical annual household use, 26.1p/kWh electricity. Change any of those and every figure above moves — which is exactly why a single national "solar costs X" number is misleading.
Notice that payback barely improves as systems get bigger, and eventually gets worse. That's because you can only save money on electricity you were going to buy anyway. Once a system covers your usage, extra panels mostly generate exports at a much lower rate.
Why St Albans gets 1,026 sun hours
That figure comes from Google's analysis of real rooftops across St Albans — it already accounts for shading from trees, chimneys and neighbouring buildings, which is why it's lower than the raw "hours of daylight" figures you'll see elsewhere. An unusually open, unshaded roof in St Albans reaches about 1,088 hours, roughly 6% better than typical.
The numbers behind this page
| Typical usable sunlight | 1,026 hrs/yr |
|---|---|
| Unshaded roof | 1,088 hrs/yr |
| Electricity rate (East of England avg) | 26.1p/kWh |
| Installed cost assumed | £1.70/W |
| Panel size assumed | 400 W |
| Typical household usage | 2,500 kWh/yr |
| Power used as generated | 31% |
| Paid for exported power | 12p/kWh (SEG) |
| Rooftops sampled here | 11 |
| Google imagery from | 2022 |
When St Albans actually produces
Annual totals hide the thing that catches people out: 42% of St Albans's yearly sunlight arrives in May–July, and just 8% across November–January.
| Month | Sun hrs | Share of year |
|---|---|---|
| Jan | 29 | |
| Feb | 49 | |
| Mar | 78 | |
| Apr | 111 | |
| May | 138 | |
| Jun | 150 | |
| Jul | 144 | |
| Aug | 122 | |
| Sep | 90 | |
| Oct | 57 | |
| Nov | 34 | |
| Dec | 24 |
That is a severe seasonal swing — St Albans produces roughly 6.2× as much in Jun as in Dec. A system sized to cover your annual usage will overproduce badly in summer and fall well short in winter, so how your utility credits exported power matters more here than in most places.
The annual total is measured from Google's rooftop imagery. Its split across months is calculated from solar geometry at St Albans's latitude, not separately measured, so treat the monthly figures as the shape of a typical year rather than a forecast.
How St Albans compares to the other 788 cities
| Measure | St Albans | Rank of 788 |
|---|---|---|
| Usable sunlight | 1,026 hrs | 709th |
| Sunlight lost to shade | 6% | 340th most |
| Median roof size | 64 m² | 766th largest |
| Electricity rate | 26.1p | 206th highest |
| Payback | 11.9 yrs | 531st fastest |
| Grid carbon | 479 kg/MWh | 606th dirtiest |
What actually stands out about St Albans:
- Roof space is the binding constraint. A typical St Albans roof fits about 7 panels and a typical home needs 8 — so there is little room to oversize. If you add an EV or heat pump later, plan the array for it now.
- Small roofs. The median St Albans roof is 64 m², smaller than 97% of cities measured — worth checking your own footprint before assuming a standard system fits.
Cities with almost the same sunlight
The closest matches to St Albans's 1,026 usable sun hours elsewhere in the UK. Sunlight varies far more across Britain than electricity prices do, so these are the places where a system of the same size produces roughly the same amount.
| City | Sun hrs | Rate | Payback |
|---|---|---|---|
| London, Greater London | 1,027 | 26.1p | 11.9 yrs |
| Newport, Wales | 1,027 | 26.1p | 11.9 yrs |
| Swindon, South West | 1,027 | 26.1p | 11.9 yrs |
| Taunton, South West | 1,023 | 26.1p | 11.9 yrs |
Nearby cities
See all of East of England → statewide sunlight, rates, incentives and every city we've measured.
St Albans solar questions
How many solar panels do I need in St Albans?
About 8 panels for an average home using 2,500 kWh a year. St Albans roofs get 1,026 usable sun hours, so each 400W panel produces roughly 349 kWh annually. A typical St Albans roof fits about 7 panels, so check your usable roof area before assuming that many will fit.
Is solar worth it in St Albans?
At 26.1p/kWh and 1,026 sun hours, a typical system pays for itself in about 11.9 years and returns roughly £6,019 over a 25-year panel life. That is slower than average, so compare several quotes before committing. Exported power earns 12p/kWh under the Smart Export Guarantee, well below the 26.1p you pay to import.
How much do solar panels cost in St Albans?
A 3.2 kW system costs about £5,440 before incentives. That works out near £1.70 per watt installed. Roof pitch, shading, electrical panel upgrades and equipment choice move the price most, which is why quotes for the same house can differ by thousands.
Worth reading before you buy
Estimates only, generated 2026-08-22 from Google Solar API rooftop samples and average East of England electricity rates. Not a quote and not financial advice. Your roof, usage, utility plan and local incentives will change these numbers — get real quotes before buying.