background image

14000 Burn Rd

Arlington, WA   98223

USA

Ph (425)374-9060

www.midnitesolar.com

             

MNDC Instructions

 

 

Rev: New  Page 1  of  7 

 
 

Model: MNDC125, MNDC175, MNDC250 

 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

          Shown with 250 amp sized breaker 

 

 

 

   MNDC closed 

 
The Mini-DC was designed to take into account many different types of renewable energy 
installations. These installation instructions will describe and show some of the more common 
possibilities.  
 

Features: 

 

Aluminum chassis. (no rust in the tropics or around salt water) 

 

Hinged door for easy access to electrical circuits 

 

Inverter breaker included (125, 175 or 250 amp) 

 

Din rail for DC circuits such as PV in, Chg Cntrl out, DC-GFP, DC loads, PV combiner 

 

Ground bus bar with 14 poles 

 

Six mounting spots for 500 amp, 50mV shunt 

 

Mounting spot for insulated bus bar (for PV negative connection point) 

 

Knock outs for inverter and battery cables, charge control mounting, DC & PV in & out 

 

5/16” diameter stud for battery negative tie point 

Summary of Contents for MNDC125

Page 1: ...of the more common possibilities Features Aluminum chassis no rust in the tropics or around salt water Hinged door for easy access to electrical circuits Inverter breaker included 125 175 or 250 amp Din rail for DC circuits such as PV in Chg Cntrl out DC GFP DC loads PV combiner Ground bus bar with 14 poles Six mounting spots for 500 amp 50mV shunt Mounting spot for insulated bus bar for PV negati...

Page 2: ...ire Top view showing three 1 knockouts The left two knockouts fit charge controllers such as the Classic MX60 C 40 and Tristar controllers The left side of the MNDC chassis has three 2 knockouts and two knockouts The 2 knockouts are intended for inverter DC cables If installing to a Trace or Xantrex SW inverter use a 2 offset nipple to attach to the SWCB conduit box If routing cables directly thro...

Page 3: ...m DC ground The ground bus bar is also where DC lightning arrestors get grounded It is advisable to use one of the conduit knockouts to mount a DC lightning arrestor to the MNDC box It is also common to have a DC lightning arrestor out at the PV Panels that are grounded through their own ground rod In dry climates it is advisable to also run a ground wire from the PV panels to the MNDC ground The ...

Page 4: ...he 500 amp 50mV shunt The MNDC does not come with this shunt so you will need to order the shunt Shunt mounted horizontal on bottom dimples Shunt mounted vertical on bottom dimples 5 16 stud for battery negative tie point Battery Positive connections DC positive from the battery bank connects to the lower section of the large DC inverter breaker The lower inverter breaker stud is also the common p...

Page 5: ...ate a wide range of inverter options Cables may also exit the bottom in order to reach an inverter not mounted to the left of the MNDC enclosure Note the 6AWG wire connected to the lower section of the inverter battery breaker This comes from the output breaker from a charge controller The inverter negative shunt connection has the corresponding negative circuit from the charge controller and nega...

Page 6: ...nstall din rail mount breakers Insure the yellow tab snaps into place to secure the breakers Strip wires 3 8 and bend at from end This section is very tight so pay close attention to wire routing Use cable ties to secure wires in a neatly routed bundle Lat the cover plate on a flat scrap wood surface and using a flat screw driver blade and hammer cut the tabs ...

Page 7: ...MNDC Installation Instructions Rev New Page 7 of 7 MNDC fully wired ...

Reviews: