A Forum run by Enthusiasts of MidNite Solar

Other MidNite Electronics => WBjr => Topic started by: Riverwind on September 19, 2014, 08:36:09 PM

Title: WBjr in Magnum MiniPanel
Post by: Riverwind on September 19, 2014, 08:36:09 PM
Had to install a WBjr in a Magnum minipanel and there is no easy way to do this using the existing shunt. I had to remove the WBjr plastic cover in order to fit the unit against the installed shunt. Only other solution I saw would be to install another shunt at an additional cost or attaching some wires and leaving it dangling. I realize this isn't ideal - leaving the cover off - but are there any problems I haven't foreseen other than a stray screwdriver frying the circuit board :(
Title: Re: WBjr in Magnum MiniPanel
Post by: Riverwind on September 19, 2014, 09:13:47 PM
Ok I backtracked and removed the metal ground bar on the shunt and was able to get the plastic cover back on. A bit brutal though.  :-X
Title: Re: WBjr in Magnum MiniPanel
Post by: vtmaps on September 20, 2014, 04:09:45 AM
You are not the first down that path:
http://midniteforum.com/index.php?topic=1983.0
http://midniteforum.com/index.php?topic=1536.0

--vtMaps
Title: Re: WBjr in Magnum MiniPanel
Post by: Halfcrazy on September 20, 2014, 08:04:58 AM
Realize that little bus bar to chassis defeats the Ground Fault protection that NEC requires...
Title: Re: WBjr in Magnum MiniPanel
Post by: zoneblue on September 21, 2014, 03:46:52 PM
Im curious too, as to why its on the bat neg side of the shunt, when the shared point of ground bond would be on the system side.
Title: Re: WBjr in Magnum MiniPanel
Post by: vtmaps on September 21, 2014, 09:46:07 PM
Quote from: zoneblue on September 21, 2014, 03:46:52 PM
Im curious too, as to why its on the bat neg side of the shunt, when the shared point of ground bond would be on the system side.

Makes sense to me... current can't get into or out of the battery without going through the shunt.  As for the bond to ground... it shouldn't normally be carrying any current, so it shouldn't matter which side it's on.  In the event (fault) that it does carry current, its current would be counted by having the bond on the system side of the shunt.

--vtMaps