Operation and installation manual
Page 16 of 96
(PVI-STRINGCOMB (-S, -MC, -S-MC) - Rev:1.0)
The fuse rating must be chosen by taking into consideration the maximum
current that can flow through the fuse (also based on the number of
strings connected to the channel in the parallel string panel) and the
maximum inverted current that each string can take. The technical data
sheets of the photovoltaic modules generally show the "Max Fuse
Rating", i.e. the maximum fuse rating that can be adopted to protect the
panel string. Usually the "Max Fuse Rating" is double of the module's
short circuit current. This allow two strings to be connected directly in
parallel without running the risk of damage to the panels. Nevertheless
these are considerations of a general nature which must be verified by a
careful check on the characteristics of the modules that make up the
photovoltaic generator.
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Figure 3-1: Effect of a panel breakdown with short-circuit
