9
3.3 Installation plan – power and communication circuits
The following example outlines the conduit plan for power and communication circuits for the battery system. In
this example, the PV inverter is coupled to a backup power sub-panel. The sub-panel may also be an isolated power
bus within the main electrical panel.
NOTES:
1-
The battery system is rated 5 kVA maximum. Solar self consumption prevents battery power export,
however, the grid power circuit must electrically accommodate the total of both battery and PV generation
when PV is connected to the backup circuit.
2-
The example above is shown with the energy meter relocated from the PCS to the main electrical panel.
For installations where the energy meter is located within the PCS, the CT (current) and voltage sense
wiring must be routed from the utility side of the electrical panel to the energy meter inputs. Refer to
sections 7 and Appendix C for more details.
Signal
Definition
Rating
P1
Grid power
-1
10 kVA max (5 kVA b 5 kVA PV), 230 Vac, 1Ø
P2
Backup power
5 kVA max, 230 Vac, 1Ø only
P3
PV power (AC), coupled to backup
5 kVA max, AC, 1Ø only
P4
Home load circuits, backup power
16 A / 230 Vac, 1Ø only
S1
Energy meter (RS-485)
-2
CAT-5, STP
S2
DRED device, Ethernet
CAT-5, UTP
S3
Home router, Ethernet
CAT-5, UTP
Figure 5: Installation plan.
