Solar Panels in Grantham, Lincolnshire
Grantham is one of the larger towns in Lincolnshire with a population of 44,580. With a solar yield of 935 kWh/kWp and 1,480+ sunshine hours per year, solar energy is a strong investment for homeowners here. A typical 4kWp system generates approximately 3,740 kWh annually, covering 98% of average household electricity use. With 0% VAT on installation, the typical cost is £5,000–£8,000 for a 3-4kWp system with payback in 6–8 years.
Grantham solar irradiance and generation figures
| Solar Metric | Value |
|---|---|
| Solar Yield | 935 kWh/kWp |
| 4kWp System Output | 3,740 kWh/yr |
| Sunshine Hours | 1,480 hrs/yr |
| Est. Annual Savings | £1047+ |
| Household Coverage | 98% of avg use |
Solar yield calculated for Grantham (52.91°N, 0.64°W) using PVGIS satellite data. Actual output varies by roof orientation, shading, and system specification.
Grantham at a Glance
| Area Data | Value |
|---|---|
| Population | 44,580 (Census 2021) |
| Elevation | 70 metres |
| Postcode Area | NG31 |
| Location | Inland |
| Coordinates | 52.9118°N, 0.6417°W |
Population and housing data: ONS Census 2021.
Renewable Energy Potential in Grantham
Grantham is a large town in Lincolnshire with a population of 44,580 (ONS Census 2021). The postcode area for Grantham is NG31. 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 3,740 kWh per year (935 kWh/kWp).
Why Go Solar in Grantham?
Save on Electricity Bills
Homeowners in Grantham can save an estimated £1047+ per year on electricity with a 4kWp solar system generating 3,720 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 Grantham today will generate clean electricity for 25-30 years with minimal maintenance.
Solar Panel Costs for Grantham Residents
Homeowners in Grantham, Lincolnshire 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 Lincolnshire
MCS-certified solar panel installers covering Lincolnshire.
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Grantham solar panel questions answered
How much do solar panels cost in Grantham?
A 3-4kWp system in Grantham typically costs £5,000-£8,000 with 0% VAT. The system generates approximately 3,720 kWh/year, paying for itself in 6-8 years.
What is the Smart Export Guarantee (SEG)?
The Smart Export Guarantee (SEG) requires licensed energy suppliers to offer a tariff to small-scale generators for electricity exported to the grid. Rates are typically 3-15p/kWh. You need a smart meter and an MCS-certified installation to be eligible.
What size solar system do I need for my home in Grantham?
Most homes in Grantham benefit from a 3-6 kWp system. A 4kWp system (10 panels) covers 98% of average household electricity use. Your installer will assess your roof space, orientation, and energy usage to recommend the optimal size.
What is the payback period for solar panels in Grantham?
With a cost of £5,000-£8,000 (0% VAT) and savings of £1047+ per year plus SEG export income, a typical solar system in Grantham pays for itself in 6-8 years. After payback, you get 20+ years of near-free electricity.
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.
Can I sell excess solar electricity?
Yes. Under the UK's Smart Export Guarantee (SEG), you can sell surplus electricity at 3-15p/kWh. You need a smart meter and an MCS-certified installation. Your energy supplier pays you for every unit exported to the grid.
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.
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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