MNPV10 and 12 Manual

ManualsBrandsMidNite Solar ManualsBalance of System (BOS) - Electrical ComponentsMNPV10 1000V Combiner Box

MNPV10, MNPV12 Combiner

Instructions

SAVE THESE INSTRUCTIONS

Applications:

 PV combiner up to 12 strings using MNPV breakers

 1000 VDC Combiner using MNTS touch safe fuse holders and fuses rated for 1000VDC

 DC load center using MNPV breakers

Features:

 All aluminum powder coated housing. Won’t rust or degrade due to sun exposure

 Can be used with transformerless inverters

 Flip up cover that can stay in the open position during installation

 PV Negative bus bar with openings for #14-6 and #1/0-14

 Chassis ground bus bar with #14-6 and #1/0-14 wire openings

 Standard din rail for mounting breakers or fuse holders

 Tin plated copper bus bars to combine breaker and fuse holder outputs

 Dead front cover snaps into place after wiring is complete for safety

 Knock outs for PV in and PV out on bottom and sides

 PV IN knockouts are ½” & 7/8” concentric to allow for bulkhead mount MC connectors or

strain reliefs

 Top surface is available to bring conduit in from directly above the enclosure

Summary of content (10 pages)

PAGE 1
MNPV10, MNPV12 Combiner Instructions SAVE THESE INSTRUCTIONS Applications:    PV combiner up to 12 strings using MNPV breakers 1000 VDC Combiner using MNTS touch safe fuse holders and fuses rated for 1000VDC DC load center using MNPV breakers Features:            All aluminum powder coated housing.
PAGE 2
MNPV10, MNPV12 Combiner Instructions (continued) IMPORTANT SAFETY INSTRUCTIONS Save these instructions – This manual contains important instructions for Models MNPV10, MNPV12, MNPV12-250, If you do not fully understand any of the concepts, terminology, or hazards outlined in these instructions, please refer installation to a qualified dealer, electrician or installer. These instructions are not meant to be a complete explanation of a renewable energy system.
PAGE 3
MNPV10, MNPV12 Combiner Instructions (continued) Configurations: The MNPV12 combiners are listed for outdoor use. These PV combiners are designed for combing PV strings up to 150 & 300VDC using MNEPVXX circuit breakers, and up to 1000VDC using MNTS touch safe fuse holders. The MNPV12 comes with a 200 amp plus busbar that works with up to ten fuse holders or twelve 150VDC circuit breakers.
PAGE 4
MNPV10, MNPV12 Combiner Instructions (continued) Installation: The installation of a PV combiner is fairly straight forward. Select the location to install your combiner first. Some systems have the PV modules located close to the inverters and or battery system. If this is the case, you can elect to mount the MNPV inside and run each PV string down to the MNPV inside the building. This is convenient for trouble shooting and upgrading.
PAGE 5
MNPV10, MNPV12 Combiner Instructions (continued) The following dimensioned drawings show the enclosure size and location of knockouts available on the MNPV12. Surge Suppressors may require a locknut on the outside in order to clear the lid. MNPV12 bottom dimensions Two 7/8” knockouts (1/2” conduit openings) are located on the sides of the MNPV12. These are primarily intended for surge suppressors. One 1 ¼” conduit knockout is located on the back mounting surface.
PAGE 6
MNPV10, MNPV12 Combiner Instructions (continued) Wiring diagram for MNPV12-250 (joined & separated) The MNPV12 has 2/0 box lugs for the plus busbars and 1/0 openings on the PV minus and ground. Note: the MNPV12-250 has special busbars that are made exclusively for the MidNite 300 volt breakers. These breakers take up the space of two regular 13mm wide breakers. The 300 volt breakers are used for high voltage off-grid PV arrays that will employ the MidNite Classic 250 MPPT controller.
PAGE 7
MNPV10, MNPV12 Combiner Instructions (continued) 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.
PAGE 8
MNPV10, MNPV12 Combiner Instructions (continued) The regular MNPV12 comes with a 1/8” thick reversible copper busbar. This busbar may be used with fuse holders above or with 150VDC breakers shown below. The busbars are rated for up to 200 amps. MNPV12 with breakers combined MNPV12 breaker wiring diagram-combined busbars Some PV Panels now require a 20 amp series fuse (breaker). The MNPV12 can support ten high voltage 20 amp fuses or breakers.
PAGE 9
MNPV10, MNPV12 Combiner Instructions (continued) Important notes for busbars on 1000 Volt units Extra care must be taken with higher voltage units to ensure that safe spacing is maintained around all connections. !Caution! Never work on a live system. Lethal voltages are present when energized. Lockout and tagout do not take chances with your life. MNPV12 busbar as shipped Important: Install the box lug in the position closer to the fuses. This is required to maintain safe spacing for high voltage units.
PAGE 10
MNPV10, MNPV12 Combiner Instructions (continued) Use the hardware supplied to connect the terminal box lug to the busbars. One 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. Box lug and screw placement for circuit breaker configuration Box lug and screw placement for fuse holder configuration Photos of the first MNPV12 installation in Minnesota.