5 Electrical Connection
User Manual
20
Item
Name
Remarks
A
PV array
-S series:
one input area with one pair of terminals.
-D series:
two input areas with two pairs of terminals.
B
Communication
module
Take the SolarInfo Wi-Fi module as an example.
C
AC circuit breaker
Used as a protective device during electrical
connection. User equips this device according to the
maximum output voltage and current.
The PE wire of the AC terminal must be directly
connected to the grounding bar. Do not connect it to
protection devices such as circuit breaker.
D
Utility grid
Nominal line-to-neutral voltage of the utility grid is
220 Vac/230 Vac.
If there are several inverters connected to the grid in parallel, each phase of
the transformer can connect 10 inverters at most. Please contact SUNGROW
for a technical evaluation if more than 10 inverters are connected.
5.3
Grounding the Inverter
All non-current carrying exposed metal parts of the equipment and other
enclosures in the PV power system should be grounded, e.g. PV array frame and
inverter enclosure.
A second Protective Earth (PE) terminal is equipped at the bottom of the inverter. Be
sure to connect this PE terminal for reliable grounding.
In no case shall the second PE connection substitute for the PE connection in
the AC terminal block. Be sure to connect both PE terminals for reliable
grounding. The loss of any or all rights may follow if otherwise.
Because of the transform-less design of the inverter, neither the DC positive
pole nor the DC negative pole are permitted to be grounded. A permanent
destroy to the inverter may follows if otherwise.
