aPbox Installation and Operations Manual
9
PV on the load side of the FHP
Installation of an aPbox is required to meter the production of and cutoff the connection
to an individual PV system installed on the load side of the FHP system due to:
•
Existing constraints, such as the location of the PV system and the aGate X, preventing
the PV system connection to the aGate X internal PV interface.
•
Multiple PV systems on-site prevent a distinct PV system from being connected to the
aGate X.
•
The total PV system output power exceeding the power rating of the aGate X internal
PV interface.
•
The total amount of the PV production exceeding the aPower energy capacity.
In this scenario, one aGate X supports up to two aPbox connections. The FHP system
controls the PV system connection according to whether the photovoltaic over-generation
in the off-grid mode.
The example site layout is shown in the following figure.
PV Breaker
Non-Backup Port
1# PV
~
=
Backup Panel
Generator
aPower Breaker
aGate X
Power Cable
Signal Cable
2# PV
~
=
3# PV
~
=
Essential
Loads
DC
CO
NO
DO
DC
485A
485B
1# aPbox
2# aPbox
M
M
CT
CT
485A
485B
M
Meter
Utility Grid
Smart Circuit
Module
(Optional)
Smart
Load 1
Smart
Load 2
Smart
Load 3
aPower X
Backup Port
