Wiring The Inverter - Solectria Renewables PVI 3000 Installation And Operation Manual

PVI 3000/4000/5000/5300
For some installations, code compliance may include indoor, NEMA 1 rated disconnects which are less expensive. For
whichever disconnect is selected, you will also need the proper listed ground bar kit. (No neutral kit is needed, as no neutral
line should enter the disconnect.)
Connecting the AC Inverter Wiring:
WARNING: The wiring of the PV inverter's AC and DC connections must only be done with the building
AC circuit breaker off and the PV array disconnected or covered with an opaque material (or other method to
assure the PV wiring is not live). Both AC and DC should be disconnected or turned off.
The PVI 3000-5300 inverters are not capable of back-feeding currents into the PV array from the AC source including into
short circuit(s) or fault(s) in the PV array or string(s).
PV String Configurations:
There is a huge number of PV module string combinations that will work well with the PVI 3000-5300 inverters given the
very large DC voltage range in which the inverter can operate. See string sizing in Appendix B for some examples. This
appendix also refers to a complete string sizing resource online.
Connecting the DC (PV) Inverter Wiring:
WARNING: Follow PV module manufacturer's directions.
exposed to light and could create a hazardous condition. (One method used to assure safety from shock is to
completely cover the surface of all PV-arrays with opaque / dark material before wiring them.) Alternatively,
keep all PV module connectors disconnected (but don't leave PV module connectors open in rainy weather or
when leaving the jobsite.)
WARNING: Before connecting the connectors of the PV-panel to the DC inverter terminals, check the correct
polarity and admissible PV-panel voltage between the (+) and the (-) cable connectors of the PV panel. (Note
that the mating connectors used to connect to your array junction box may have reversed polarity markings.)
The PV-panel open circuit voltage must be below 600V DC (V
690-7 using multiplier for cold weather OCV, or using PV module manufacturer's specifications. Please read
the Technical Info section and see PV string sizing table in Appendix B.
WARNING: Even when in the off position, the fused PV combiner and the DC disconnect terminals will
remain live on the PV side when the PV modules are in daylight.

Wiring the inverter

The cover of the wiring box needs to be removed before wiring the inverter. First the DC/AC disconnect switch shall be
turned to the OFF position as shown in the Figure 2.3.1. and then remove the 4 screws; remove the cover of the wiring box
shown in the figure 2.3.2 and 2.3.3 below.
PV-arrays produce electrical energy when
< 600V DC) under all conditions as per NEC
pv
18
Installation and Operation Manual