SolaX Power X3-ULTRA Series - Parallel Connection

58
Electrical Connection
7.6.2 Parallel Connection
The inverter provides the parallel connection function. One inverter will be set as the “Master
inverter” to control the other "Slave inverters" in the system. The maximum number of
parallel-connected inverters is as follows:
Table 7-4 Maximum number of inverter parallelled
Application
X3-ULT-
15K
X3-ULT-
19.9K
X3-ULT-
20K
X3-ULT-
25K
X3-ULT-
30K
With X3-PBOX-
150kW-G2
10 7 7 6 5
Without X3-PBOX-
150kW-G2
3
Requirements for parallel connection
• All inverters should be of the same software version.
Parallel connection diagram
+
-
+
-
Meter/CT
Parallel 1 Parallel 1Parallel 2 Parallel 1Parallel 2
COM
Inverter
Master
Inverter
Slave
PV+ PV- Battery
PV+ PV- Battery
PE PE PE
PE
Meter
X3-PBOX-
150kW-G2
R RS T N S T N
R S T N
R S T N
Grid EPS
Grid EPS
R
S
T
N
Three-phase
Normal Load
Three-phase
Normal Load
Single-phase
Normal Load
Single-phase
Normal Load
Single-phase
Normal Load
R
S
T
N
R
S
T
N
NLR S T N
NL
NL RSTN
Grid
R S T N
EPS
Grid
Figure 7-31 System diagram with SolaX X3-PBOX-150kW-G2