Calculating Your Roof's Solar Potential
One of the biggest constraints for urban homeowners in India is roof space. Understanding how many panels can fit on your terrace is the first step in system design. This calculator helps you convert your electrical requirement (bill or kW) into physical panel count and area.
The Evolution of Panel Size & Efficiency
Solar technology has moved fast. Just 5 years ago, the standard panel was a 330W Polycrystalline module. Today, the standard is 550W Mono PERC, and the premium option is 580W+ TopCon Bifacial technology.
Why High-Wattage Panels are Better:
- Less Space: A 3kW system needs ~9 Poly panels but only ~6 Mono PERC panels.
- Lower BOS Cost: Fewer panels mean fewer clamps, rails, and civil work for the structure.
- Better Aesthetics: Modern black panels look sleeker on your home.
Rule of Thumb: Space Calculation
While expert installers do a detailed Shadow Analysis using software like SketchUp or Helioscope, you can use a simple rule of thumb for estimation:
1 Kilowatt (kW) = 100 Sq. Ft. (approx)