System Configuration
2–18 976-0043-01-02
See “Installing the Battery Temperature Sensor (BTS)” on page3–18 for
instructions on installing the Battery Temperature Sensor.
Wiring Considerations
Conduit boxes For maximum safety and, in some cases, for code-compliance , run the AC
and DC cables in conduit(s). Pre-plan the wire and conduit runs carefully
before installing any components.
Main AC
distribution panel
(utility fed)
The AC1 input to the inverter requires a 60-amp breaker maximum be
installed into the main AC distribution panel (double-poled if stacked) to
protect the wiring in accordance with NEC. This breaker supplies utility
grid power to the inverter. AC1 is no t used in off-grid applications.
Generator
disconnect switch Installing a disconnect switch with an appropriately sized circuit breaker
(60 amp maximum) between the generator and inverter provides over-
current protection for the wiring between the generator and the inverter’s
AC2 terminal. This is also a good safety practice as it also provides a
means to prevent the inverter wi ring from becoming energized in the
event that an electric-start generator starts unex pectedly while the inverter
is being serviced.
Subpanel/Inverter
Panel In on-grid applications, loads backed up by the inverter will need to be
rerouted from the main AC distribution panel to a subpanel. In off-grid
application, the inverter panel functions as the main electrical panel.
Always use properly rated circuit breakers.
Fuses and/or DC
disconnects Install a DC disconnect breaker or fuse in the positive, ungrounded,
battery line. This breaker protects the DC wiring in the event of an
accidental shor t. Size the break e r in accordance wi th t he battery cables .
Switch this breaker OFF (or rem ove the fuse) whenever servic ing the
batteries or inverter(s).
Important:
Be sure to consul t the local and nat ional electrical c odes to confirm
grounding and bonding requirements specific to the intended system. All wiring
and installation methods should conform to applicable electrical codes and
building codes.
WARNING: Fire Hazard
Check existing structure wiring for “multi-branch wiring”. For new constructi on,
do not use “multi-branch wiring”.
For both cases refer to Appendix F, “Multi-wire Branch Circuit Wiring” for
additional informa tion.