Shenzhen Growatt New Energy Technology CO,.LTD
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Parameter configuration under parallel connection
Communication between PACKs
PACK voltage difference limit
5
If the voltage difference is measured more than 1V, the difference shall be adjusted to be
less than 1V either by charging the PACK with lower voltage or discharging the PACK
with higher voltage before conducting the parallel connected installation.
Step 1: Install PACKs
Power on two PACKs in
condition of no load,
measure the voltages with a
multi-meter and confirm
voltage difference less than
1V. After that, power off two
PACKs and install PACKs
according to the procedures
specified in Section 2.2 or
2.3. For either wall-mounted
or floor standing installation,
the distance between two
PACKs should range
between 30cm≤W≤50cm.
Step 2: Insert main power
lines
Connect power lines of both
PACKs based on the second
step of Section 3. Plug one
ends of positive and negative
terminals into direct current
breaker according to
electrical diagram of parallel
connection as above.
Measure the positive and
negative cathodes of both
PACKs with a multi-meter,
and ensure the voltage output
under off mode is 0V. Plug
the other ends of power lines
into terminals on two PACKs
(orange positive terminal and
black negative terminal).
Step 3: Insert communication
line
Connect RS485 and CAN
wires based on the third step of
Section 3. Connect two PACKs
with the RS485 wire, and
connect PACK and PCS with
the CAN wire according to
electrical diagram of parallel
connection as above.
Specifically, Plug two
terminals of RS485 wire into
two communication ports of
PACKs, plug one end of CAN
wire into the left port of any
PACK, and plug the other end
into PCS communication port.
