Many UK homes don't have ideal south-facing roof space for solar panels. While north-facing installations will never match the performance of south-facing systems, they can still make financial sense in certain situations. This guide explains when north-facing solar is worth considering and what alternatives exist when it isn't.
Key Points
- North-facing panels generate approximately 50% of what south-facing panels produce
- Only consider north-facing installation if no south, east, or west-facing roof space is available
- System size matters more on north-facing roofs - larger installations are more likely to be financially viable
- Installation costs (like scaffolding) have greater impact on smaller north-facing systems
- Your electricity usage pattern significantly affects whether the numbers work
- Modern panels perform better in low light conditions than older technology
Common Misconceptions
- North-facing panels are completely pointless - they can still generate meaningful electricity
- All solar panels perform equally on north-facing roofs - modern panels handle low light better
- Installation is more technically challenging on north-facing roofs - there are no additional technical difficulties
- North-facing systems never pay for themselves - this depends entirely on system size, costs, and your usage
Real-World Advice
A typical scenario where north-facing solar works: a homeowner with high daytime electricity usage, a large north-facing roof that can accommodate 12+ panels, and no viable south/east/west roof space. The key is having enough roof area to install a system large enough to offset the reduced generation with volume.
Conversely, a small 6-panel north-facing system requiring expensive scaffolding is unlikely to provide good returns, especially for homes with low electricity usage.
UK-Specific Considerations
Weather Impact: The UK's frequently overcast conditions mean north-facing panels still receive diffused sunlight, though significantly less direct radiation than other orientations.
Export Tariffs: With current Smart Export Guarantee rates around 4-7p/kWh, maximising self-consumption becomes more important for north-facing systems due to their lower generation.
DNO Applications: No additional complications for Distribution Network Operator applications - standard G98/G99 rules apply regardless of roof orientation.
When This Isn't Right For You
North-facing solar isn't suitable if:
- You have usable south, east, or west-facing roof space available
- Your roof can only accommodate a small system (typically under 8-10 panels)
- Installation costs are high relative to system size (e.g., complex scaffolding required)
- Your electricity usage is very low
- You're looking for maximum financial returns rather than any renewable energy generation
- Your budget is tight and you need the fastest payback period possible
Before You Spend Money
Before committing to north-facing solar:
1. Get generation estimates from installers using professional software for your specific roof angle and shading
2. Calculate your usage patterns - higher daytime usage improves the economics
3. Compare system sizes - get quotes for the largest system your roof can accommodate
4. Consider all costs including scaffolding, electrical work, and any roof modifications
5. Explore alternatives like battery-only systems or waiting to move to a property with better roof orientation
6. Get multiple quotes as some installers may be reluctant to install north-facing systems
Frequently Asked Questions
Q: How much less electricity will north-facing panels generate?
A: Approximately 50% compared to identical south-facing panels, though this varies with roof pitch, shading, and local weather patterns.
Q: Will my system still qualify for export payments?
A: Yes, north-facing systems are eligible for Smart Export Guarantee tariffs, though you'll export less electricity overall.
Q: Are there special panels for north-facing roofs?
A: No special panels are needed, though modern panels generally handle low-light conditions better than older technology.
Q: What's the alternative to north-facing solar?
A: Battery storage systems that charge overnight on cheap tariffs and discharge during expensive daytime rates, or waiting until you have access to better roof orientations.
Summary
North-facing solar panels can work financially, but only as a last resort when no other roof orientations are available. The key is having enough roof space for a large enough system to overcome the 50% generation penalty. For smaller roofs or tight budgets, battery-only systems may provide better value. Always get detailed generation estimates and compare the economics carefully before proceeding.