International Electrotechnical Commission

ENshadow cover rate 
(Symbol: sA) (Unit: dimensionless, usually expressed as a percentage, %)

ratio of the equivalent area of the shaded portion of a PV array surface (As) to the overall PV array area (A)

It is calculated by:

sA = As / A


sA is the shadow cover rate;

As is the equivalent area of the part covered by shadow (m2);

A is the overall PV array area (m2)

NOTE The stated "equivalent area" is the assumed shadow area estimated including the influence of the shadow on the illuminated area through PV modules connected in series or in parallel

TC/SC:82Terms     Info     Publications
Published in:IEC 61836, ed. 2.0 (2007-12) Terms     Info
Reference number:3.4.78

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