MNPV10 and 12 Manual

MNPV10, MNPV12 Combiner Instructions (continued)
7 | P a g e 10- 2 5 9 - 1 R E V : D
Install box lug in the square hole closest to the fuses
See page 9.
Non-Isolated / Transformerless
configuration.
In this configuration the combiner is
separated into two halves.
One side combines and fuses the
negative and the other side fuses and
combines the positive.
Overcurrent protection is required by
the NEC on both the positive and the
negative wires in from the solar panels.
The MNPV12 can accomplish this for up
to five strings.
MNPV12 Wiring for use with transformerless inverters
MNPV12 Wiring for use with two charge controllers with separate negatives
Wiring for two charge controllers.
In this configuration the combiner
acts as two combiners.
Two separate busbars are provided
for combining the negatives and the
positives are fuse protected then fed
into two separate busbars. The
ground is common.
Each half can have up to five touch
safe fuseholders or six 150 Volt fuses
or three 300 Volt circuit breakers
Note:
The NEC requires that the ungrounded
conductor(s) in from the solar panels must be
overcurrent protected. Transformerless systems
do not ground either the positive or the negative.
That is why protection is required for both sides of
the input.
Install box lug in the square hole closest to the fuses
See page 9.