4. INSTALLATION
WARNING:
BE AWARE THAT INSTALLATION OF THIS EQUIPMENT INCLUDES RISK OF
ELECTRIC SHOCK. NORMALLY GROUNDED CONDUCTORS MAY BE UNGROUNDED AND
ENERGIZED WHEN A GROUND FAULT IS INDICATED.
Parts Included
In addi
�
on to the micro inverters, PV modules, racking, and associated hardware,
you’ll need the BDM-250 installa
�
on kit. This kit includes the following items:
●
Protec
�v
e end cap
●
Moun
�
ng Bracket (adapter plate)
●
AC interconnect cable and protec
�v
e end CAP
Other Parts and T
oo
ls Required
In addi
�
on to your PV array and its associated hardware, you will need the
following parts:
●
Junc
�
on box
●
Con
�
nuous grounding conductor, grounding washers
●
Number 2 Phillips screwdriver
●
Sockets, wrenches for moun
�
ng hardware
●
Torque wrench
●
Moun
�
ng hardware suitable for module racking
Lightning Surge Suppressi
o
n
Lightning does not actually need to strike the equipment or building where PV
system is installed to cause damage. O
�
en, a strike nearby will induce voltage
spikes in the electrical grid that can damage equipment. BDM-250 has integrated
surge protec
�
on, greater than most string inverters. However, if the surge has
su
ffi
cient energy, the protec
�
on built into the BDM-250 can be exceeded, and
the equipment can be damaged.
Since the NEP Limited Warranty does not cover “acts of God” such as lightning
strikes, and since lightning strikes can occur anywhere, it is best prac
�
ce to install
surge protec
�
on as part of any solar installa
�
on. Installa
�
on of surge protec
�
on
devices should follow vendor instruc
�
ons.
Installa
�o
n Pr
o
cedure
WARNING:
DO NOT CONNECT BDM-250 TO THE UTILITY GRID OR ENERGIZE THE AC
CIRCUIT(S) UNTIL YOU HAVE COMPLETED ALL OF THE INSTALLATION PROCEDURES AS
DESCRIBED IN THE FOLLOWING SECTIONS.
Installing the BDM-250 Micro inverter System involves several key steps:
1. Measuring service and installing the AC branch circuit junc
�
on box.
WARNING:
ONLY USE ELECTRICAL SYSTEM COMPONENTS APPROVED FOR WET
LOCATIONS.
2. A
�
aching the BDM-250 Micro inverter to the racking.
3. Connec
�
ng the BDM-250 Micro inverter wiring harnesses.
4. Grounding the system.
5. Comple
�
ng the BDM-250 Micro inverter installa
�
on map and connec
�
ng the
PV modules.
The
fi
nished system should be similar as in the diagram. Detailed installa
�
on
steps are listed in the following sec
�
on.
Step 1 - Install the AC Branch Circuit Junc
�o
n B
o
x
1. Measure service entrance conductors to con
fi
rm AC service at the site.
Acceptable ranges are shown in the table below:
●
BDM-250-240A & BDM-250-208A (North America)
240 Volt AC Single Phase
208 Volt AC Single Phase
L1(red) to L2(black)
211 to 264 Vac L1(red) toL2(black) 183 to 229 Vac
L1(red), L2(black) to
neutral(blue)
106 to 132 Vac L1(red), L2(black)
to neutral(blue)
106 to 132 Vac
05
04
