Generac Power Systems PV Link, Installation Manual

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14 Installation Manual for PV Link and SnapRS
Connecting to Inverter
See
Figure 5-3
. Connect each PV Link output
to the REbus DC nanogrid and inverter.
Figure 5-3. Connecting PV Link Optimizer
When connecting optimizers to the inverter:
• Do not reverse the input and output or
cross-wire polarity. To avoid confusion,
complete the wiring of the PV Link output
before installing PV modules.
• Do not connect PV Link optimizers in
series.
• Connect multiple PV Link outputs in paral -
lel. To connect PV Links in parallel:
– Connect all negative (RE-) PV Link
outputs on a home run together.
– Connect all positive RE (+) outputs
on a home run together.
• Current adds when connecting optimizers
in parallel. The maximum output current of
each PV Link is 8 A. When wiring PV Link
outputs to the inverter, observe tempera -
ture ratings and current-carrying capacity of
the wire used, including appropriate NEC
derating factors.
NOTE: Multiple home-runs will be necessary
in larger systems.
• Connect field wiring to the PV Link with
Staubli MC4 PV connectors only.
• Mark positive REbus field wiring leads with
red insulation or flagging.
• Mark negative REbus field wiring leads with
blue insulation or flagging.
• Connect multiple optimizers in parallel,
using MC4 branch connectors or a com -
biner box.
Connecting PV Modules
NOTE: Warranty does not cover water ingress
through wiring from external connections due
to poor wiring practices.
2014 NEC and Earlier Editions
For NEC 2014 compliant systems, connect
the substring PV modules in series.
To install PV modules in series to PV Link:
1. Connect the negative lead of the first mod -
ule in the string to the PV Link at the loca -
tion marked PV Substring Input (-). See
Component Locations for PV Input loca -
tion.
2. Connect the first module’s positive lead to
the second module’s negative lead.
3. Continue connecting the substring module
leads in series until the last module is
reached.
4. Connect the positive lead of the last mod -
ule in the substring to the PV Link at the
location marked PV Substring Input (+).
See Component Locations for PV input
location.
5. Make a string map using the serial number
stickers and record in
Table 1: PV Link and
SnapRS Important Information the follow -
ing information:
– Each PV Link serial number
– Each PV Link RCP number
– Number of parallel strings
(000659)
Equipment damage. Connect the PV Link output to a REbus-
compatible device (± 190 VDC nominal regulated DC bus)
only. Connecting to conventional PV inverters or any other
device could cause equipment damage.
CAUTION
010027
(000657)
Equipment damage. Never leave the PV Link MC4
connectors open and exposed to the atmosphere overnight
or during rain. Doing so could cause equipment failure.
CAUTION
(000661)
Equipment damage. Never connect PV Link to any other
power source. The optimizer is designed to work with series
connected PV modules only. Connecting the optimizer to any
other power source could cause equipment damage.
CAUTION