Solar Panels for Warehouses: Maximising Your Roof Space [2026 Guide]
Warehouses are ideal for solar with large roof spaces and high daytime energy use. Learn how to maximize returns from your warehouse solar installation.
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Why Warehouses Are Perfect for Solar
Warehouses represent the best opportunity for commercial solar in the UK. Large, flat roofs combined with high daytime electricity consumption create ideal conditions for exceptional returns. Yet only 5% of UK warehouses currently have solar installed.
The Warehouse Solar Advantage
- Vast Roof Space: Typical warehouses have 5,000-50,000m² of roof space, enabling large installations
- Flat Roofs: Easier installation with optimal panel positioning
- Minimal Shading: Industrial locations typically free from surrounding obstructions
- High Daytime Use: Operations during daylight hours maximize self-consumption
- Strong Roof Structures: Built to handle loading, easily supporting panels
Typical Warehouse Solar Systems
| Warehouse Size | System Size | Cost | Annual Savings | Payback |
|---|---|---|---|---|
| 5,000m² | 150kW | £110,000 | £28,000 | 3.9 years |
| 10,000m² | 300kW | £210,000 | £54,000 | 3.9 years |
| 20,000m² | 600kW | £400,000 | £105,000 | 3.8 years |
ROI Calculation Example
For a 20,000m² distribution centre:
- Available roof space: 15,000m² (accounting for skylights, plant)
- Potential system: 600kW
- Annual generation: 510,000 kWh
- Self-consumption (80%): 408,000 kWh
- Grid savings (24p/kWh): £97,920
- Export income (5p/kWh): £5,100
- Total annual savings: £103,020
- System cost: £400,000
- Payback: 3.9 years
Installation Considerations
Roof Assessment: We evaluate roof condition, structural capacity, and access requirements.
Operational Continuity: Installation can proceed while operations continue below.
DNO Connection: Large warehouse systems require G99 applications, which we handle.
The 5% Opportunity
With only 5% of UK warehouses having solar, early adopters gain competitive advantage through lower operating costs. As energy prices remain volatile, solar provides cost certainty for 25+ years.