MNPV, Midnite Solar, combiner, MNPV3, MNPV6

Midnite Solar MNPV Combiner Box

The MNPV3 &MNPV6 combiner is rated for outdoor use.

The use of touch safe din rail mount fuse holders and fuses allow operation up to 600 Volts. The
MNPV6 combiner comes with two copper bus bars. One for circuit breakers and one for fuses. The MNPV3
busbar is designed for circuit breakers only.

Applications:

PV combiner up to six strings using MNPV breakers rated for 150VDC. 120 amps total output
PV combining up to four strings using MNATM6, 10 or 15 touch safe fuse holders rated for 600VDC
DC load center using MNPV breakers

Features:

• All aluminum powder coated housing that won’t rust
• Flip up cover that can stay in the open position during installation
• PV Negative bus bar with 14 useable openings (10 #14-6 and 4#1/0-14)
• Chassis ground bus bar with 14 useable openings (10 #14-6 and 4#1/0-14)
• Standard din rail to mount up to 6 breakers or 4 fuse holders
• Tin plated copper bus bar to combine breaker outputs (MNPV6 busbar may be split in two)
• Dead front cover snaps into place after wiring is complete for safety
• Knock outs for PV in and PV out on bottom and sides
• Top surface is available to bring conduit in from directly above the enclosure
Note: The plastic dead front fits very tight. You must first remove the lid in order to remove the dead front.

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 house. This is convenient for trouble shooting and upgrading. For longer runs the combiner will be mounted outdoors on the pole for pole mounted PV arrays or similar mounting for rack mounted arrays. The combiner can be mounted in the vertical position or slanted backwards to accommodate up to a 3/12 roof pitch. All unused holes should be blocked using RTV sealant or some similar goop in order to keep rain and bugs out of the enclosure.

Note the warning label on each side of the enclosure. Care must be taken to insure that no water will get on terminal busbars when mounted less than vertical. Removal of the labels are allowed if conditions are met. It is very common for critters to enter through an unused mounting hole and take up roost. They will eventually degrade the performance of your system to say nothing of the yuk factor upon discovery of their nest.

Click here for more MNPV installation information in PDF format.

The picture on the right shows an MNPV6 with a MidNite Solar DC-GFP installed inside along with two combiner breakers. This is a novel use of the DC-GFP in the combiner enclosure.