Quick Answer
As a rough guide, you need approximately 6-8 square metres per kW of solar capacity. A 50kW system requires around 300-400 sqm of unshaded roof space.
Detailed Answer
Roof space requirements depend on panel efficiency and mounting system. Heres a guide for planning:
Space Requirements by System Size
- 10kW: 60-80 sqm
- 30kW: 180-240 sqm
- 50kW: 300-400 sqm
- 100kW: 600-800 sqm
- 250kW: 1,500-2,000 sqm
Factors Affecting Space
Flat roofs need additional space for tilt frames. Obstructions like skylights and vents reduce usable area. Our survey identifies the optimal layout for your specific roof.
Key Takeaways
- As a rough guide, you need approximately 6-8 square metres per kW of solar capacity.
- A 50kW system requires around 300-400 sqm of unshaded roof space.
Related Questions
What size solar system does my business need?
System size depends on roof space, electricity consumption, and budget. A rule of thumb: 1kWp requires 6-7m² of roof space and generates 850-900 kWh annually. A 100kW system needs 650-700m² and generates 85,000-90,000 kWh/year. We provide free site surveys to determine optimal sizing.
How long do commercial solar panels last?
Commercial solar panels last 25-30+ years with minimal degradation. Most panels come with 25-year performance warranties guaranteeing 80-85% output after 25 years. Inverters typically last 10-15 years and may need replacement. We provide comprehensive warranties and ongoing maintenance.
Do solar panels work on cloudy days?
Yes, solar panels generate electricity in cloudy conditions, though at reduced capacity. UK solar systems generate approximately 70% of potential on overcast days. Annual generation accounts for UK weather patterns, providing reliable year-round performance. Even Scotland's 1,200 sunshine hours delivers excellent ROI.
What maintenance do commercial solar panels require?
Solar panels require minimal maintenance. We recommend annual inspections and cleaning every 1-2 years to maintain optimal performance. Most systems include remote monitoring to detect issues immediately. Our maintenance packages ensure maximum generation and lifespan.
What is the difference between G98 and G99 applications?
G98 applies to systems up to 3.68kW per phase (11.04kW total for 3-phase). G99 covers larger systems and requires DNO approval before connection. Most commercial installations are G99. We handle all DNO applications, which typically take 6-8 weeks for approval.
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