
6 Electrical Connection
SMA Solar Technology AG
Installation Manual
SBxx-1SP-US-40-IA-xx-15
47
Requirements for the PV modules per input:
☐ All PV modules should be of the same type.
☐ All PV modules should be aligned and tilted identically.
☐ If inputs A and B are connected in parallel, the PV modules of inputs A and B should be
identically aligned and the same number of PV modules connected in series must be
connected to all strings of inputs A and B.
☐ The maximum inverter system voltages permitted may not be exceeded (see Section 10
☐ The maximum short-circuit current may not be exceeded (see Section 10 "Technical Data",
Additionally required material (not included in the scope of delivery):
☐ Conduits (trade size: 21 mm (0.75 in) or smaller with suitable reducer bush)
☐ UL-listed raintight or liquidtight conduit fittings (trade size: 21 mm (0.75 in) or smaller with
suitable reducer bush)
Requirements on the DC conductors:
☐ The conductors with regards to its ampacity, rated temperatures, operating conditions and its
power loss must be made in accordance with the local standards and the
National Electrical
Code
®
ANSI/NFPA 70 or the
Canadian Electrical Code
®
CSA C22.1.
☐ The DC terminal block temperature rating is +90°C (+194°F).
☐ Conductor type: copper wire
☐ Maximum permissible temperature: 75°C (+167°F) or 90°C (194°F)
☐ The conductors must be made of solid wire, stranded wire or fine stranded wire. When using
fine stranded wire, bootlace ferrules must be used.
☐ Conductor cross-section: 2.5 mm² to 10 mm² (14 AWG to 8 AWG)
6.6.2
Connecting the PV Array
NOTICE
Damage to the inverter due to ground fault on DC side during operation
Due to the transformerless topology of the product, the occurance 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.
ENGLISH
Содержание SB3.0-1SP-US-40
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