Why Shadow Analysis is Critical Before Installing Solar

The Silent Killer of Solar Generation

Solar panels are connected in series (called strings). If one panel in a string is covered by a shadow from an overhanging tree, a chimney, or a water tank, the output of the ENTIRE string drops to match the lowest performing panel. This is known as the 'Christmas tree light' effect.

How to Perform Shadow Analysis

A professional vendor will use specialized software (like SketchUp or PVsyst) alongside drone footage to simulate the sun's path throughout the year (Azimuth and Elevation). This ensures the panels are mounted in areas that remain 100% shadow-free between the peak generation hours of 9 AM and 3 PM.

Micro-Inverters and Optimizers

If your roof is complex and shadows are unavoidable, you cannot use a standard string inverter. You must invest in Half-Cut panels coupled with Micro-inverters (like Enphase) or DC Optimizers (like SolarEdge). These technologies ensure that a shadow on one panel does not affect the neighboring panels.