Fronius IG Plus A 3.0-1 UNI User Manual

42
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
One single solar module string connected with reverse
polarity - risk of damage, risk of fire !
Overview ‘Connecting solar module strings to the inverter (DC)’ includes the following sections:
- 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
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-
+
-
-
-
+
+
DC+ DC-
+
-
-
-
+
+

Fronius IG Plus A 3.0-1 UNI Specifications

General

AC nominal output	3000 W
Max. apparent AC power	3000 VA
Max. output current	13 A
AC grid frequency	50 / 60 Hz
THD	<3%
Max. DC voltage	500 V
Number of MPP trackers	1
AC voltage range	183 V - 264 V
DC input voltage range	150 - 450 V
Cooling	Convection