MNPV2 and MNPV4 Prewired Instruction Manual

Prewired MNPV2 & 4 Installation Instructions (continued)
Rev: - Page 4 of 6
The diagram to the right shows typical connections for the
MNPV4 combiner. The MNPV2 is the same except that it
combines fewer strings. Note that items inside the dashed
lines are external to the combiner.
The solar panel connectors are all factory pre-wired leaving
only the combined plus and minus as well as the ground
connections to be completed at installation.
Solar panels and wire size: The MNPV2 & 4 are rated for up
to 600 VDC. The busbars and output box lug are UL and
CSA listed for 90 degree Centigrade.
Recommended torque values. These values apply to both bus
bars and Plus output box lug.
The fuse holders are factory wired, but use the values above should retightening
Be required for any reason. Re-torque fuse holders after one hour.
The MidNite MNPV2 & MNPV4 combiners utilize touch safe fuse holders
and fuses rated for up to 600 volts DC. The MNPV2 can accommodate two
and the MNPV4 can accommodate four USM1 type fuse holders made by
Ferraz Shawmut or other compatible fuse holders.
Fuses are available from 1 to, 30 amps. (80 amps total for MNPV4 & 60 amps
total MNPV2)
The combiners come with 15 amp fuses installed.
Do not open the fuseholders under load.
You WILL have a fire on your hands!
Left: Combiner installed on
A pole mount array.
Torque –Fuseholder
USM1 Fuse holders 15 in-lbs
(
1.7Nm
)
Torque – Terminal Bus Bar
10AWG 20 in-lbs (2.3Nm)
8AWG 25 in-lbs (2.8Nm)
6AWG 35 in-lbs (4.0Nm)
4AWG 45 in-lbs (5.1Nm)
2AWG – 1/0 50 in-lbs (5.6Nm)
Right:
Ferraz Shawmut
USM1 Touch Safe fuseholder
Midnite Solar part number - MNTS