Solar Panels in Llandaff, Cardiff
Llandaff is a small town in Cardiff with a population of around 10,930. The area has a solar yield of 880 kWh/kWp. A 4kWp solar system generates approximately 3,520 kWh annually, saving an estimated £986+ per year. With 0% VAT, a typical 3-4kWp system costs £5,000–£8,000.
Llandaff solar yield and performance data
| Solar Metric | Value |
|---|---|
| Solar Yield | 880 kWh/kWp |
| 4kWp System Output | 3,520 kWh/yr |
| Sunshine Hours | 1,480 hrs/yr |
| Est. Annual Savings | £986+ |
| Household Coverage | 93% of avg use |
Solar yield calculated for Llandaff (51.50°N, 3.22°W) using PVGIS satellite data. Actual output varies by roof orientation, shading, and system specification.
Llandaff at a Glance
| Area Data | Value |
|---|---|
| Population | 10,930 (Census 2021) |
| Elevation | 30 metres |
| Postcode Area | CF5 |
| Location | Inland |
| Coordinates | 51.4960°N, 3.2180°W |
Population and housing data: ONS Census 2021.
Going Solar in Llandaff
Llandaff is a small town in Cardiff with a population of 10,930 (ONS Census 2021). The postcode area for Llandaff is CF5. You'll need your full postcode when getting quotes from MCS-certified installers. Based on satellite data for this location, a 4kWp solar system generates approximately 3,520 kWh per year (880 kWh/kWp).
Solar panel benefits in Llandaff, Cardiff
Save on Electricity Bills
Homeowners in Llandaff can save an estimated £986+ per year on electricity with a 4kWp solar system generating 3,520 kWh annually.
0% VAT on Installation
Residential solar panel installations are zero-rated for VAT in the UK, saving you hundreds of pounds on a typical system.
MCS Certified Quality
All installations use MCS-certified installers, ensuring high standards and eligibility for the Smart Export Guarantee (SEG).
Earn from Excess Energy
Sell surplus electricity at 3-15p/kWh through the Smart Export Guarantee (SEG). Your energy supplier pays you for every unit exported to the grid.
Increase Property Value
Solar panels improve your EPC rating and can add up to 4% to your property value.
25+ Year Lifespan
A system installed in Llandaff today will generate clean electricity for 25-30 years with minimal maintenance.
Llandaff solar panel cost breakdown
Homeowners in Llandaff, Cardiff benefit from 0% VAT on solar panel installations. Typical system costs for 2026:
| System Size | Typical Cost (incl. 0% VAT) | Est. Payback |
|---|---|---|
| 2 kWp | £3,000 - £4,500 | 7-8 years |
| 3-4 kWp | £5,000 - £8,000 | 6-8 years |
| 5-6 kWp | £7,000 - £10,000 | 6-7 years |
Solar Installers in Cardiff
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Solar Panel FAQs for Llandaff
How much do solar panels cost in Llandaff?
A 3-4kWp system in Llandaff typically costs £5,000-£8,000 with 0% VAT. The system generates approximately 3,520 kWh/year, paying for itself in 6-8 years.
What is the payback period for solar panels in Llandaff?
With a cost of £5,000-£8,000 (0% VAT) and savings of £986+ per year plus SEG export income, a typical solar system in Llandaff pays for itself in 6-8 years. After payback, you get 20+ years of near-free electricity.
Can I add a battery to my solar system?
Yes. A home battery (typically 5-10 kWh) stores excess solar electricity for evening use. This increases your self-consumption from around 30-40% to 60-80%. Batteries currently cost £3,000-£6,000 and also benefit from 0% VAT.
Do I need planning permission for solar panels?
Most residential solar installations in the UK are permitted development and don't require planning permission, provided panels don't project more than 200mm from the roof surface. Listed buildings and conservation areas may have additional requirements.
What maintenance do solar panels need?
Solar panels need very little maintenance. Rain keeps them clean in most cases. There are no moving parts. Your inverter may need replacing once in 25 years (10-15 year lifespan). Annual visual checks and occasional cleaning if near trees is all that's needed.
What roof direction is best for solar panels in Llandaff?
South-facing roofs produce the most electricity (100% of potential). South-east and south-west roofs produce around 95%. East or west-facing roofs still produce 80-85%. North-facing roofs are generally not recommended for solar panels in the UK.
Can I get solar panels on an east or west facing roof in Llandaff?
Yes. East or west-facing roofs still produce 80-85% of the output of a south-facing roof. Many installers recommend splitting panels across east and west to spread generation throughout the day, which can actually improve self-consumption.
Sources
- MCS — Microgeneration Certification Scheme
- MCS — Find a Certified Installer
- Ofgem — Smart Export Guarantee (SEG)
- PVGIS — EU Joint Research Centre (solar irradiance data)
- ONS — Census 2021
- Met Office — Climate Data
Last updated: March 2026
Fact-checked by John Rooney, Solar Energy Editor. Editorial policy
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