5 5 Electrical ConnectionsElectrical Connections
DANGER DANGER
Dangerous electrical voltage at the DC connectionsDangerous electrical voltage at the DC connections
EvenwhenswitchedotouchingtheDCconnectionoftheinverterwillcauseEvenwhenswitchedotouchingtheDCconnectionoftheinverterwillcause
a lethal electric shock.a lethal electric shock.
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Reason is that the electrical charge remains in the capacitor after the DC switch
hasbeenswitchedo.Therefore,atleast5minutesmustlapsebeforethecapaci-
tor has been electrically discharged.
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PV modules generate electrical energy when exposed to sunlight, and this may
present an electrical shock hazard. DC voltages on the PV array can reach up to
1100 V.
NOTICE NOTICE
Open circuit voltage outside of permissible rangeOpen circuit voltage outside of permissible range
Open circuit voltage outside of permissible range can destroy the inverter.Open circuit voltage outside of permissible range can destroy the inverter.
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Open circuit voltage of the PV strings should not exceed 1100 V
(see Technical Data on page 69).
ModelModel Max. PV / Panel ISCMax. PV / Panel ISC
Max. AC output current atMax. AC output current at
Nominal Grid VoltageNominal Grid Voltage
380 VAC380 VAC 400 VAC400 VAC 415 VAC415 VAC
SOFAR 100KTLX-G4
25A per String /
50 A per MPPT
152.0 A 145.0 A 139.2 A
SOFAR 110KTLX-G4 167.2 A 159.5 A 153.1 A
SOFAR 125KTLX-G4/G4A 190.0 A 181.2 A 174.0 A
Connection sequenceConnection sequence
✔ The connected PV modules must be compliant with IEC 61730 class A.
Electrical installation is performed as follows:
1. 1. Connect PE cable
2. 2. Connect DC input cable
3. 3. Connect AC output power cable
4. 4. Connect communication cable (optional)
28/78 SOFAR 100...125KTLX-G4
Electrical Connections