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Polarity Reversal
of Solar Module
Strings
Connecting all solar module strings with reverse polarity will not cause any damage to the
inverter.
All solar module strings connected with reverse polari-
ty - no damage to the inverter
Overview
'Connecting solar module strings to the inverter (DC)' includes the following sections:
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CAUTION! Risk of damage and fire to inverter due to reverse polarity of single
solar module strings.
Reverse polarity of even one single solar module string can cause an unaccept-
able thermal load, which can lead to an inverter fire.
Confirm string polarity and voltage before connecting DC wires to the inverter!
DC+ DC-
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Connecting solar module strings
Criteria for the proper selection of string fuses
Connecting combined solar module strings using connecting distributors
Solar module ground at positive pole: Connecting solar module strings
Criteria for the proper selection of string fuses
Solar module ground at positive pole: Connecting combined solar module strings us-
ing connecting distributors
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One single solar module string connected with reverse
polarity - risk of damage, risk of fire !
DC+ DC-
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