Introduction to field mismatch

No two solar panels are identical. Even after going through same manufacturing process, panels made for a specific ratings does not have same specific outputs. There is generally tolerance range of 5%. For example a two panel made for 100W specification can have have two separate ratings of 95W and 105W.

Series mismatch degrades solar cell performance.

Generally while installing a plant this factor is ignored and panels having extreme ends of specification might get connected in series which further leads to degradation. Plant which intended to give a desired output does not perform on its full potential.

Steps for Revival

1) Take initial readings(STC) for the plant. 2) Take Readings(STC) for individual Solar panels from solar analyzers. 3) Extract the data from analyzers and sort the solar panels on the basis of there short circuit current. 4) According to available infrastructure Re-rack solar panels on the basis of their efficiency within previously sorted panels on the basis of similar short circuit currents. 5) Now make Series parallel connections and convert it Total cross tied connection or any suitable configuration. 6) Take new readings(STC) of the plant. Mark the improvements.

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