Installation Manual

MNPVHV Disco Instructions (continued)
7 | P a g e 1 0 - 065- 1 R E V : F
Reconfiguring MNPVHV Combiners:
MNPVHV Combiners come complete with all the busbars and additional labels required to reconfigure to any of
the three possible configurations, Non-Isolated, 2 Inverter and Parallel. All combiners are shipped from the
factory setup as parallel.
You will need:
#2 Phillips screwdriver Slotted screwdriver
5/16, 3/8 and 7/16 wrenches Crimper for MNSPD ring lugs (If needed)
First, the definition of the configurations.
1. Parallel: In this mode the Negative input busbars are joined into a single unit and the Positive
outputs are joined at the disconnect providing an 8 (MNPV8HV) or 16 (MNPVHV16) string
combiner. This is the default configuration.
2. 2 Inverters: In this mode the Negative input busbars are separate as are the Positive outputs
providing 2 separate 4 (MNPV8HV) or 8 (MNPVHV16) string combiners with a single 2 pole
disconnect.
3. Non-Isolated: In this mode the negative input busbars are not used, rather the Negative inputs go
directly to the fuseholders on the left and the Positive inputs go to the fuseholders on the right. This
provides a 4 (MNPV8HV) or 8 (MNPVHV16) string combiner fused on the Negative as well as on
the positive with a single 2 pole disconnect as required for a Non-Isolated installation.
MNPV16HV:
Output busbars.
These remain for all
configurations
MNPV16HV Parallel configuration (default).
16 string Disconnecting Combiner
PV Negative input
busbar jumper. Used
for Parallel only
PV Positive output,
2 used for 2 Inverter
configuration
Shown installed
PV Positive label.
Changes to PV
Negative label on Non-
Isolated configuration
only