Installation and Operation Manual (Rev B)
PVI 10KW, 13KW, 15KW
10
DOCR-060011
For the
DC wiring without an integrated fused PV combiner
, two conductors are required (one
for the grounded conductor and one for the ungrounded conductor) plus additional conductors
for grounds (see section 4.1). 90°C copper conductors must be used. The disconnect switch
terminals are listed for 75
o
C wire; see NEC 310.10 or Canadian Electrical Code regarding
temperature ratings of wire and terminals. Temperature derating factors, voltage drop and
other considerations may dictate that larger than minimum wire sizes be used. Verify that wire
size choices meet local codes.
Inverter
Model
Maximum
DC Input
Current
Number of
DC
Conductors
Minimum DC Wire
Size
(at Max. DC Input
Current)
Maximum DC Wire
Size
Torque
PVI 10KW
52A
1
10 AWG, 90°C Cu
1/0 AWG, 90°C Cu
45 in-lb
PVI 13KW
69A
1
10 AWG, 90°C Cu
1/0 AWG, 90°C Cu
45 in-lb
PVI 15KW
77A
1
10 AWG, 90°C Cu
1/0 AWG, 90°C Cu
45 in-lb
Table 4.2 – Wire Sizes Associated with DC Disconnect Switch
For the
DC wiring with the optional integrated fused PV combiner
, up to 16 total conductors
are required (one for the grounded conductor and one for the ungrounded conductor of each
string) plus additional conductors for grounds (see section 4.1). 90°C copper conductors must
be used. The combiner terminals are listed for 75
o
C wire; see NEC 310.10 or Canadian Electrical
Code regarding temperature ratings of wire and terminals. Ungrounded conductors (typically
the positive DC conductors) are landed in the touch-safe fuse holders. Grounded conductors
(typically the negative DC conductors) are landed in the terminal block. Temperature derating
factors, voltage drop and other considerations may dictate that larger than minimum wire sizes
be used. Verify that any wire size choices meet local codes.
String Fuse
Size
Minimum DC
Wire Size
Maximum DC
Wire Size
Torque
(Ungrounded
Conductors)
Torque
(Grounded
Conductor)
6A
10 AWG, 90°C Cu
4 AWG, 90°C Cu
30 in-lb
35 in-lb
8A
10 AWG, 90°C Cu
4 AWG, 90°C Cu
30 in-lb
35 in-lb
10A
10 AWG, 90°C Cu
4 AWG, 90°C Cu
30 in-lb
35 in-lb
12A
10 AWG, 90°C Cu
4 AWG, 90°C Cu
30 in-lb
35 in-lb
15A
10 AWG, 90°C Cu
4 AWG, 90°C Cu
30 in-lb
35 in-lb
20A
10 AWG, 90°C Cu
4 AWG, 90°C Cu
30 in-lb
35 in-lb
Table 4.3 – Wire Sizes Associated with Optional Integrated Fused PV Combiner
The grounded DC connections are bonded to the ground system within the inverter through the
ground fault detection and interrupt circuit (GFDI). The PV grounded connections should not be
bonded to the ground system at any other point. The PV ungrounded connections must never
be bonded to the ground system at any time.
