It is generally impractical to simulate a complete solar array. Hence a smaller sample, or coupon is generally used. An example of a coupon used for testing of a solar array is shown in Figure E-1.
The spacing between the cells is an important parameter but it is not constant as the assembly is done manually. It has been measured on the sample at various locations and is generally between 800 µm and 900 µm. The minimum used on the real solar array tested in the coupon.
Figure E-1: Photograph of solar cells sample – Front face & Rear face (Stentor Sample. Picture from Denis Payan - CNES®).