Before installing solar panels, your roof needs to meet certain requirements. Here are 7 critical factors SolarWale checks during every site audit.
1. Structural strength:
Solar panels with mounting structures weigh about 15-20 kg per square meter. Your roof must handle this load. Most RCC roofs in India easily can, but older structures or tin/asbestos roofs need careful evaluation.
2. Available area:
You need approximately 10 square meters per kW of solar capacity. A 5 kW system needs about 50 sq meters of shadow-free roof area. Water tanks, antennas, and staircases reduce usable space.
3. Shadow analysis:
Even partial shading can dramatically reduce output. We check shadows from nearby buildings, trees, parapets, and structures at different times of day and across seasons.
4. Roof age and condition:
Solar panels last 25+ years, so your roof should too. If your roof needs repair or waterproofing, do it before installation. Removing and reinstalling panels later is expensive.
5. Orientation:
South-facing roofs are ideal in India. East-west orientations still work well. North-facing roofs are generally not suitable.
6. Electrical infrastructure:
Your existing electrical panel, wiring, and meter should be in good condition. The DISCOM connection should support net metering.
7. Access for maintenance:
Panels need periodic cleaning and inspection. Ensure there's safe access to the installation area.
SolarWale's free roof audit covers all 7 factors with a detailed written report, so you know exactly what to expect before making any commitment.