Installation Guide

MNPV12 & 16 Combiner Instructions (continued)
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The MidNite MNPV12 can utilize touch safe fuse holders and fuses rated for up to 600 volts DC for high
voltage strings. The MNPV12 comes with a special busbar that has reversible legs to accommodate ten of
these USM1 type fuse holders made by Ferraz Shawmut. Fuses are available from 1 to 30 amps.
Tighten fuse/circuit breaker connections to the torque indicated in the table below.
Important! Re-torque after one hour. Do not skip this step. You may be surprised by how much the
connections may loosen after the initial tightening.
Use the hardware supplied to connect the terminal box lug to the busbars. 1 10-32 x 3/8” screw, one star
washer and one box lug. Connect the top side of one busbar to the other using one 10-32 x 3/8” screw and
one kepnut.
Photos of the first MNPV12 installation in Minnesota. Photos compliments of Daryl Thayer
MidNite Solar 17722 67
th
Ave NE Arlington, Wa 98223 360.403.7207 www.midnitesolar.com
Box lug and screw placement for circuit
breaker configuration
Box lug and screw placement for fuse
holder configuration
Torque –Fuseholder / Circuit Breaker
QY Circuit breakers 20 in-lbs (2.3Nm)
USM1 Fuseholders 15 in-lbs (1.7Nm)