PVI 3000/4000/5000/5300
Installation and Operation Manual
52
Connection of the DC wiring for Positive Grounded Systems
The PVI 3000-5300 inverter also supports positive ground for some applications. This option should be ordered from the
factory if positive grounding is desired. If ordered as positively grounded with the “P” suffix on the part number, it will
come with a label on the front stating that it is a Positive Grounded unit and the PV+ and PV- will be labeled for positively
grounded, etc. The connections to the array follow the same instructions as above for hook up.
If any inverter is ordered as negatively grounded, it can be “converted” to positively grounded following these
instructions:
1.)
Open the wiring box (lower unit with AC/DC disconnect in the center) and remove the inverter cover (upper unit)
2.)
As shown in the figure D4, below, the JP14 and JP15 jumpers need to be placed at the higher positions to set to
positive grounding.
3.) The
red
DC wire (that connects the inverter board to the wiring box below) needs to be connected to Grounded,
DCIN- (labeled “Ungrounded (+)“) terminal on the wiring box PCB and the
black
DC wire (that connects the
inverter board to the wiring box below) needs to be connected to Ungrounded, DCIN+ terminal on the wiring box
PCB.
4.) Add permanent weatherproof labels over the Ungrounded (+) and Grounded (-) labels below the green terminal
blocks. The left terminal block must be labeled “Ungrounded (-)“ and the right terminal block must be labeled
“Grounded (+)”. Optional: add “Warning, Positively Grounded Unit” label to outside of unit at bottom right corner
of wiring box. (a label kit is available from Solectria if requested).
In this case the installer shall connect the positive polarity of the DC input from the PV string(s) to the original Grounded
(-) terminal(s) which are now labeled “Ungrounded (-)”and the negative polarity of the DC input from the PV string(s) shall
be connected to original Ungrounded (+) terminal(s) now labeled Grounded (-) as shown in the figure D5.
1
Ne
ga
tiv
e
gr
o
u
n
d
Po
s
itv
ie
gro
und
1
JP14
JP1
4
JP15
JP1
5
P
o
s
itv
ie
gr
o
und
N
e
ga
tiv
e
g
ro
und
11
Black wire connected to
DCIN+
Red wire connected to
DCIN-
Fig D4
Positive Ground Setting and Vdc wires connections
Black wire connected to
Ungrounded, DCIN+
Red wire connected to
Grounded, DCIN-
