User Manual
6 Electrical Connection
29
requirement).
Therefore, PV string should be designed to meet the open-circuit voltage
requirement even under the lowest ambient temperature condition.
PV Configuration Mode-Parallel Mode
For parallel mode, the PV inputs can be configured in parallel inside the
connection cabinet.
All PV strings connected to the inverter have a homogenous
structure, including the same type, the same number, identical tilt
and identical orientation.
As shown in the following diagram, the inverter may choose parallel mode due
to no difference between the two PV inputs.
Prior to connecting the inverter to PV inputs, the following electrical
specifications must be met simultaneously:
Total DC Power Limit
Open-circuit Voltage
Limit for Each Input
Short-circuit Current
Limit for Total Input
40500W
1000V
80A
You should also take the negative open-circuit voltage temperature coefficient
into consideration when designing the PV string.
Configuration of PV Connection Mode
PV configuration mode of the inverter can be performed by a switch on the
configuration circuit board.
Independence mode: turn the switch ON.
Parallel mode: turn the switch OFF. Connect DC1+ to DC2+ and DC1- to
DC2- on the DC connection circuit board by inserting jumper cables of
cross-section not less than 6mm
2
(10 AWG).
6.3.2 PV Connection Procedures
DC cables from PV strings should be equipped with DC connectors.
Sungrow provides corresponding plug connectors in the scope of delivery for
quick connection of PV inputs. Pairs of MC4 DC connectors are supplied in the
scope of delivery. (
Plug-in Connection Version
)
