Quick Answer
System size depends on your electricity consumption and available roof space. A general rule is 1kW of solar per 1,000 kWh annual consumption, though this varies by usage patterns.
Detailed Answer
Proper system sizing ensures maximum return on investment. Too small and you miss savings potential; too large and you export excess power at lower rates.
Sizing Guidelines
- Small office: 10-30 kW (40-120 panels)
- Medium warehouse: 50-100 kW (150-400 panels)
- Large factory: 100-500 kW (400-2000 panels)
- Industrial complex: 500+ kW
Key Considerations
We analyze your electricity bills to understand consumption patterns and design a system that maximizes self-consumption. Roof space, orientation, and shading are also factored in.
Key Takeaways
- System size depends on your electricity consumption and available roof space.
- A general rule is 1kW of solar per 1,000 kWh annual consumption, though this varies by usage patterns.
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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