← Solar Electricity for Home UK
Solar for Detached Houses (UK)
Detached homes offer the most flexibility for solar — larger roof areas, multiple orientations, and space for batteries and EV chargers.
At a Glance
Usable Roof Area
30–60 m² usable
Typical System Size
4–8 kWp
Number of Panels
10–20 panels (400W)
Annual Output
3,400–6,800 kWh
Estimated Cost
£6,500–£12,000
Ranges based on typical UK homes. Your actual figures depend on specific roof dimensions, orientation, and shading.
Constraints & Solutions
Common Constraints
- Larger roof may still have shading from trees, dormers, or satellite dishes
- Complex roof shapes (hips, valleys, dormers) reduce usable area
- Higher electricity consumption may require larger systems
- Larger systems (above 3.68 kW) require G99 DNO application
Solutions
- Multiple roof planes allow east-west split for extended generation window
- Larger systems justify battery storage for maximum self-consumption
- Ground-mounted arrays possible if roof isn't suitable (garden space required)
- Three-phase supply allows up to 11 kW under G98 (no G99 needed)
Tips for Homeowners
- Size for future needs — EV charging and heat pumps increase electricity demand significantly
- Detached homes can typically achieve 60–100% electricity offset with a well-designed 6–8 kWp system
- If you have a large south-facing roof, consider filling it — the marginal cost per panel decreases with size
- Ground-mounted systems are an option if your roof is shaded or north-facing
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