Installation Guide RN5000US
41
CAUTION!
Verify the polarity and the open-circuit voltage from the PV strings before you
connect the DC wires to the Digiwatts unit.
Applying an open-circuit DC-input
voltage that exceeds the maximum DC-input-voltage range will cause
irreversible damage to the Digiwatts unit and void the warranty!
Always
configure the DC-input-voltage range correctly before connecting the DC-input
wires from the PV array to the Digiwatts unit.
Figure 5-4 PV Modules Connection to Digiwatts unit
The PV modules connected to either the left or right two DC connectors should be:
---Same type
---Same number
---Identical alignment
---Identical tilt
The maximum length of DC connecting cables should not exceed 30m
as required
by the EMC Directive.
When connecting just two identical strings, it is more efficient to connect these to
the left or right two DC connectors.
(Exception: shaded strings or if the total input
current is more than 13A.).
The connecting cables of the PV modules must be fitted with plug connectors.
