Combiners & Disconnects

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Combiners and Disconnecting Safety Equipment.

PV Disconnecting Combiners

ironridgeDisconnecting combiners are a weather resistant box that takes the AWG wires from the solar panels or separate arrays and combines all the wires into a main breaker or fuse box with a disconnect blade handle to quickly shut down the system. Each piece of equipment in a PV system, such as inverters, batteries, and charge controllers, must be able to be disconnected from all sources of power (NEC 2011, Article 690.15). Breakers and fuses are sold separately and are not included.

roof rack

combiner boxCombiners and Disconnecting are similar to plain combiners except they have a visible blade to disconnect the entire array and can be locked out for servicing the array. Like combiners disconnecting combiners can be placed anywhere but the safest and most cost efficient location is near the array. Typically on a ground mount rack the combiner / disconnect would be placed on the back of the rack shaded by the panels.

MidNite Solar MNPV Combiners with Disconnect Switch Guide
The MidNite Disco line of solar combiners with disconnects incorporates NEC 2011 requirements. The disconnect handle is bright red for visibility and can be locked in the off position. Several models can be configured for bi-polar or non-isolated inverters where both the positive and negative legs of the array need circuit protection (maximum output current is split also). Models are available for 150 VDC, 300 VDC, or 600 VDC arrays. All of the combiners are made from powder-coated aluminum for long life in harsh conditions. A clear see-through dead front is supplied with all Disco combiners. Models are available with either NEMA 3R or NEMA 4X ratings. Many of these come with a shunt trip disconnect that enables the MNDiscoPSB to trip the disconnect remotely. An MNSPD-600 is included standard with many of these combiners. See the table below for options that are available or included. Breaker versions do not include breakers. HV versions come with fuse holders except for the MNPV4HV Disco 3R Basic.
  PV Source Circuit Options Output Circuits        
Model Max # 150 VDC Breakers Max # 300 VDC Breakers Max # 600 VDC Breakers Max # 600 VDC Fuses Max # Output Circuits Max Current Output Max Output Wire Size MNPV Combiner Dimensions
(L"x W"x H")
Weight Birdhouse Trip Option / MNSPD Part Number
MNPV6 Disco 6 -- 1 -- 2 120 A 1/0 AWG 12.7 x 7.9 x 7.5 6 lbs No 053-03000
MNPV6-250 Disco -- 3 -- -- 1 120 A 1/0 AWG 12.7 x 7.9 x 7.5 6 lbs No 053-03001
MNPV6 Disco AC Micro -- 3 AC -- -- 1 120 A 1/0 AWG 12.7 x 7.9 x 7.5 6 lbs No 053-02984
MNPV4HV Disco 3R Basic -- -- -- 4 1 80 A 1/0 AWG 15.4 x 18.4 x 5 8 lbs No 053-02990
MNPV4HV Disco 3R Dlx -- -- -- 4 1 80 A 1/0 AWG 15.4 x 18.4 x 5 10 lbs Opt/Yes 053-02991
MNPV6HV Disco 4X -- -- -- 6 1 125 A 2/0 AWG 20.8 x 17.3 x 5.8 14 lbs Opt/Yes 053-02992
MNPV8HV Disco 3R -- -- -- 8 2 160 A 2/0 AWG 23.4 x 19.3 x 5.4 16 lbs Opt/Yes 053-02993
MNPV8HV Disco 4X -- -- -- 8 2 160 A 2/0 AWG 23.4 x 19.3 x 5.4 18 lbs Opt/Yes 053-02994
MNPV16HV Disco 4X -- -- -- 16 2 230 A 350 mcm 23.5 x 26 x 5.8 27 lbs Opt/Yes 053-02995

breaker*Only with Breakers, and One Negative Busbar    **120 A for 150 VDC Breakers and 80 A with 600 VDC Fuses

MidNite Solar MNPV Combiners with Disconnect Switch
Part Number   Product Data Install Price Add to Cart
5100147 xrs Midnite Solar, Combiner box with disconnect handle and 6 breaker busbar, Add 150VDC, 120VAC or 600VDC DIN mount breakers, MNPV6 DISCO solar mounts solar mounts
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5100182 xrs Midnite Solar, Combiner box with disconnect handle and 3 breaker busbar, Add up to 3 300VDC, or 6 120VAC, or 6 150VDC, or 3 240VAC, or 1 600VDC DIN mount breakers, MNPV6-250 DISCO solar mounts solar mounts
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5100181 xrs Midnite Solar, Disconnect Combiner, 4x15A Fused inputs, 80A, 600VDC, NEMA 3R, with SPD600, Birdhouse Compatible, MNPV4HV Disco 3R-Deluxe solar mounts solar mounts
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5100183 xrs Midnite Solar, Disconnect Combiner, 6x15A Fused inputs, 100A, 600VDC, NEMA 4X, with SPD600, Birdhouse Compatible, MNPV6HV Disco 4X solar mounts solar mounts
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5100184 xrs Midnite Solar, Disconnect Combiner, Dual 4x15A Fused inputs, Dual 80A busbars field config, 600VDC, NEMA 3R, with SPD600, Birdhouse Compatible, MNPV8HV Disco 3R solar mounts solar mounts
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5100186 xrs Midnite Solar, Disconnect Combiner, Dual 8x15A Fused inputs, Dual 100A busbars field config, 600VDC NEMA 4X, with SPD600, Birdhouse Compatible, MNPV16HV Disco 4X solar mounts solar mounts
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5100244 xrs MNPVHV8-DLTL-3R - Midnite Solar, Disconnect Combiner, two Dual 2x15A Fused inputs (with 8 fuses), two Dual switched Pos/Neg disconnect, 600VDC, NEMA 3R, Birdhouse Compatible (SHOWN WITH OPTIONAL MNDISCOPSB (POWER SUPPLY BOARD)

SMA requested MidNite Solar to design and build these DLTL combiners. There are 4 strings entering the combiner with 2 separate strings out. Specifically designed for the new dual channel MPPT on the transformer-less inverters.
  solar mounts
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midniteMidNite and OutBack Combiners & Disconnects Ship in 3 - 5 Business Days After Funds Clear subject to seasonal increases and available inventory.

MidNite Solar Combiners / Disconnecting - AC Micro Inverter
Part Number   Product Data Install Price Add to Cart
5100202 xrs Midnite Solar, MNPV6 Disco AC Micro Combiner, 3 Pole, 240VAC, NEMA 3R, MNPV6 Disco AC Micro Combiner solar mounts solar mounts
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MidNite Solar Stop Switch for DC Wind Turbines
MidNite Solar's Stop Switch allows you to stop an AIR wind generator and disconnect it from the battery, all in one motion. The MN-Stop Switch comes with a neutral bus bar and ground box terminal. Rated for wind turbines up to 63 amps at up to 150 VDC. Enclosure size: 9"H x 5"W x 4"D. Weight 3 lbs. ETL Listed for the U.S.A. and Canada.
Part Number   Product   Install Price Add to Cart
05300121 xrs Midnite Solar, MNSTOPSWITCH, Stop Switch for Wind Turbines, 63 AMP 150 VDC   solar mounts
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Combiners and Disconnecting Safety Equipment.
electrical distribution parts

Combiners and other Disconnecting solar safety equipment are different from junction boxes or the commonly used term “J-box). Combiners and disconnects not only allow for the combination of multiple strings down to one or two outputs, but also provide a fast means of shutting down the array at the panels. Sections 690-4(c), 690-14(b), and 690-18 of the National Electric Code talks to this application and make the combining disconnect an essential component of a code-compliant system.

Combiners and Disconnecting Weatherproof Box

Combiners located outside at a minimum must be NEMA 3R rated and UL listed. The MidNite Disco line of solar combiners with disconnects incorporates NEC code standards. Additionally, conduit and strain reliefs use at the knockouts will keep the inside of the box dry and protect the jacket of the PV wire.