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MNPV12 & 16 Combiner Instructions

SAVE THESE INSTRUCTIONS

Applications:

 PV combiner up to 16 strings using MNPV breakers rated for 150VDC. 120 amps total output

 PV combiner up to 12 strings using 600VDC fuses and MNTS touch safe fuse holders rated for 600VDC

 DC load center using MNPV breakers

Features:

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

 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 (8 pages)

PAGE 1
MNPV12 & 16 Combiner Instructions SAVE THESE INSTRUCTIONS Applications:    PV combiner up to 16 strings using MNPV breakers rated for 150VDC. 120 amps total output PV combiner up to 12 strings using 600VDC fuses and MNTS touch safe fuse holders rated for 600VDC DC load center using MNPV breakers Features:           All aluminum powder coated housing.
PAGE 2
MNPV12 & 16 Combiner Instructions (continued) IMPORTANT SAFETY INSTRUCTIONS Save these instructions – This manual contains important instructions for Models MNPV12, MNPV12-250, MNPV16, MNPV16-250 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
MNPV12 & 16 Combiner Instructions (continued) Configurations: The MNPV12 and MNPV16 combiners are listed for outdoor use. These PV combiners are designed for combing PV strings up to 150 & 300 VDC using MNEPVXX circuit breakers, and up to 600VDC 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
MNPV12 & 16 Combiner Instructions (continued) 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
MNPV12 & 16 Combiner Instructions (continued) The following dimensioned drawings show the enclosure size and location of knockouts available on the MNPV12&16. Lightning arrestors 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 lightning arrestors. One 1 ¼” conduit knockout is located on the back mounting surface.
PAGE 6
MNPV12 & 16 Combiner Instructions (continued) MNPV16 bottom dimensions PV input knockouts for these combiners are a dual concentric knockout that can accept bulkhead mount MC cable connectors. Configuring these enclosures with the bulkhead mount connectors in advance can save time in the field. Several brands will fit the ½” diameter knockouts.
PAGE 7
MNPV12 & 16 Combiner Instructions (continued) MNPV12 with MNTS fuse holders MNPV12 wiring diagram with MNTS fuse holders 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).
PAGE 8
MNPV12 & 16 Combiner Instructions (continued) 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.