Pv Connection; External Pv Array Junction Boxes - SMA SUNNY HIGHPOWER PEAK1 Instructions D'installation

2 Installation

2.9 PV Connection

2.9.1 External PV Array Junction
Boxes
PV strings must be connected to the DC input via an external
PV array junction box. The PV array junction box connects
the PV strings of the PV array and protects the individual
strings against overcurrent with appropriate fuse protection.
INFORMATION
The same number and type of modules must be
connected to all PV strings connected to the PV array
junction box. In addition, all connected modules must
have the same orientation.
INFORMATION
Observe correct fuse rating. Consult the module
manufacturer's manuals for information on correct
string fuse rating.
INFORMATION
Use a suitable voltage detector that can measure up
to 1000 V DC. Verify the polarity and maximum
voltage of the PV arrays by measuring the PV
open-circuit voltage.
The inverter is protected against short-term reverse
polarity. Not correcting reverse polarity results in
irreparable defects of the inverter and will void the
warranty.
• Make sure that the cables are properly connected to
the inverter so that the inverter can feed in DC input
voltage.
The combined power from the PV array junction box must
be connected to the DC input of the inverter.
PV array is floating, with both the (+) and (-) conductors
connected to the PV inputs of the inverter. Neither
conductor is connected to ground.
The DC power can be disconnected with the
inverter-integrated DC load-break switch.
28 SHP75-10-STP60-10-IA-xx-18
Do NOT connect PV to ground!
Danger due to ground fault on DC side during
operation
Due to the transform erless topology of the product, the
occurrence of ground faults on DC side during operation
can lead to irreparable damage. Damages to the product
due to a faulty or damaged DC installation are not
covered by warranty. The product is equipped with a
protective device that checks whether a ground fault is
present during the starting sequence. The product is not
protected during operation.
• Ensure that the DC installation is carried out correctly
and no ground fault occurs during operation.
Danger to life due to fire or explosion
In rare cases, an explosive gas mixture can be generated
inside the product in the event of an error. In this state,
switching operations can cause a fire or explosion. Death
or lethal injuries due to fire or flying debris can result.
• In case of error, only carry out corrective measures
specified by SMA Solar Technology AG (for
corrective measures see Section 4.1, page 34).
If no corrective measures are specified, do not
perform any actions on the product. Contact the
service.
• Disconnect the PV array from the product via an
external disconnection device. Do not operate the
DC load-break switch on the product
• Ensure that unauthorized persons have no access to
the product.
• Disconnect AC circuit breaker and secure against
reconnection.
SMA Solar Technology AG
Installation Guide