Recent posts

#81

The Rosie / Re: ungrounded Rosie?

Last post by BlackwaterPark - October 23, 2025, 10:49:00 AM

yeah a bit confusing - from manual at various places
I don't have a Rosie but was looking at this to try and figure out if I have my system grounding properly
It seems like it says you only need one 6 gauge ground wire from grounding busbar  to a grounding rod ? As long as all the other interconnecting grounds are properly sized.
The pictorial is a bit confusing since there is a line that is showing the earth ( like in dirt )  but it almost looks like a conductor.
The green dotted line is not a conductor but just drawing a box around all the grounding points.   So if you look at label #8 it shows the actual conductor going to ground rod . Some of the grounds in system pictorial  are in black and some are in green . I didn't study it long enough to determine if that signifies internal grounds and external grounds in system .
Larry

MNROSIE7048 MANUAL

• The Rosie has two separate electrical systems – AC and DC; therefore, each electrical
system is required to be connected to a permanent, common, ground or earth reference

The easiest way to wire your ground system, and one that the NEC allows the smallest size
of GEC, is shown in Figure 10 below.
o Notice the single GEC-DC conductor (#8) – one connection in this entire system to
the ground rod

#8 – #6 AWG. Grounding Electrode Conductor (GEC-DC). Because the grounding system
has a common ground busbar (in the DC panel) and all EGCs, SBJs, and GECs are connected
to that ground busbar, and the system has only one GEC (the GEC-DC) to the ground rod,
the NEC allows for #6 AWG wire

I have been getting the strong sense that no one really knows, lol. I turned to AI to get an additional grasp of things, and chatgpt and google AI turn out to be at odds on several points too...but considering both protocols are drawn from the same pool of human knowledge, I suppose it only makes sense that this would be the case.

In particular, I asked chatgpt if I could use a single ground bus bar to ground ALL grounds, both ac and dc, which then run in a single lead to my two newly driven and bonded together earth rods. It said yes, and that was a good and efficient way of doing it.
When I asked google AI the same exact question, it told me most definitely not to do it that way, insisting that the dc and ac should always be on their own ground busses, but in the step by step instructions it then tells me to bond the dc ground bus TO the ac bring bus which then goes out to the rod. So I have to ask... of they are bonded directly anyway, why the hell can't they just share the same bus bar??

so very confusing.

#82

The Rosie / Re: ungrounded Rosie?

Last post by ClassicCrazy - October 21, 2025, 11:51:47 AM

yeah a bit confusing - from manual at various places
I don't have a Rosie but was looking at this to try and figure out if I have my system grounding properly
It seems like it says you only need one 6 gauge ground wire from grounding busbar  to a grounding rod ? As long as all the other interconnecting grounds are properly sized.
The pictorial is a bit confusing since there is a line that is showing the earth ( like in dirt )  but it almost looks like a conductor.
The green dotted line is not a conductor but just drawing a box around all the grounding points.   So if you look at label #8 it shows the actual conductor going to ground rod . Some of the grounds in system pictorial  are in black and some are in green . I didn't study it long enough to determine if that signifies internal grounds and external grounds in system .
Larry

MNROSIE7048 MANUAL

• The Rosie has two separate electrical systems – AC and DC; therefore, each electrical
system is required to be connected to a permanent, common, ground or earth reference

The easiest way to wire your ground system, and one that the NEC allows the smallest size
of GEC, is shown in Figure 10 below.
o Notice the single GEC-DC conductor (#8) – one connection in this entire system to
the ground rod

#8 – #6 AWG. Grounding Electrode Conductor (GEC-DC). Because the grounding system
has a common ground busbar (in the DC panel) and all EGCs, SBJs, and GECs are connected
to that ground busbar, and the system has only one GEC (the GEC-DC) to the ground rod,
the NEC allows for #6 AWG wire

#83

The Rosie / Re: ungrounded Rosie?

Last post by BlackwaterPark - October 19, 2025, 01:25:42 PM

Anything metal in your system should be grounded. You are totally off-grid if I remember right.  When you installed the main CB panel for the house, that panel has, or should have, a ground lug.  I would either start there, or your main power source if it's not co-located, I.e. your inverter, start with the ground lug on that. Whichever is easiest to get to an outside ground bar.  From that point, you simply run a ground wire to any metal box connected to the system.  Ensure the size of the grounding wire is appropriate for the largest size of the wire you are using in your system.

yes, completely off grid, not near any poles at all actually. Question...if your objective is to connect every piece of metal to a ground bar, why can't you locate the ground bar indoors near your gear and then run a single lead to the rod?  Wouldn't this save on copper and time? Also, the thickest wire in my system is OO for the battery leads (oversized for sure).... surely I wouldn't need a grounding lead of that heft...?

I would suggest reading the Rosie manual it goes into great detail on system grounding and equipment grounding, starting on page 22:

https://www.midnitesolar.com/pdfs/10-432-1_Rev_C_(MNROSIE7048_Manual)_22MAR2024.pdf

So, part of this manual ended up causing even more confusion for me. They state in Fig 8, page 25, that the easiest way and what they appear to recommend involves a "DC dedicated grounding electrode", which i'm taking to mean a ground rod to which ONLY the DC side connects to. Is this correct? Because literally everything what i've read, from  chatgpt to google results and various other sources say that nec code requires both the AC AND DC to connect to the same grounding system so that they share the same voltage reference point. What am i missing here?

#84

The Rosie / Re: Rosie Remote trip breakers...

Last post by holdmode - October 18, 2025, 02:28:49 PM

If ail you are trying to do is shut down a Rosie Inverter it's really simple.  Rosie has a remote shutdown connection you just need to wire to the Bird House's aux relay.  A tripped Birdhouse will engage the relay and shut down Rosie removing AC power from the house.

Omg. I saw it before the two "pin", it never crossed my mind. I will use cat 5. 55 feet away between, and you say the " Bird House's aux relay" Okay. I'll try it in December when I see Rosie again. Thank you.

#85

The Rosie / Re: Rosie Remote trip breakers...

Last post by Wizbandit - October 17, 2025, 05:10:27 PM

If ail you are trying to do is shut down a Rosie Inverter it's really simple.  Rosie has a remote shutdown connection you just need to wire to the Bird House's aux relay.  A tripped Birdhouse will engage the relay and shut down Rosie removing AC power from the house.

#86

The Rosie / Re: Rosie Remote trip breakers...

Last post by Brucey - October 17, 2025, 04:15:14 PM

May need this not sure?

https://www.solar-electric.com/midnite-solar-mnfx-cable.html

#87

The Rosie / Re: Rosie Remote trip breakers...

Last post by holdmode - October 17, 2025, 03:25:37 PM

I did my search, what I need is (3) MN125rts and (3) MNBDM-48v. But the MNBDM, still working? Before starting buying I need confirmation this setting will be available to work.
Thank you for the suggestion and inputs.

From what I can tell, one or more birdhouses initiate the signal over cat 5 to one or more mnbdms, to which the shunt trip breakers are connected. What's not clear to me is if/how many you can parallel multiple shunt trip breakers to a single mnbdm board. I would call or email Midnite to see.

Yes I have the MNBirdhouse connected to MNPV8HV-DLTL. But Rosie still alive. The picture from MidNite showing it is possible. I will wait For more inf. Thank you the input.

Does it work on the mnedc125rts? I guess get those working first before you add the mnedc250rt for the rosie?

Thanks for the information. I will buy it and try it. The test will be in December.. I have both items long time ago and work perfect. Thank Bruces & Wizbandit for the inputs.

#88

The Rosie / Re: Rosie Remote trip breakers...

Last post by Brucey - October 16, 2025, 04:56:03 PM

I did my search, what I need is (3) MN125rts and (3) MNBDM-48v. But the MNBDM, still working? Before starting buying I need confirmation this setting will be available to work.
Thank you for the suggestion and inputs.

From what I can tell, one or more birdhouses initiate the signal over cat 5 to one or more mnbdms, to which the shunt trip breakers are connected. What's not clear to me is if/how many you can parallel multiple shunt trip breakers to a single mnbdm board. I would call or email Midnite to see.

Yes I have the MNBirdhouse connected to MNPV8HV-DLTL. But Rosie still alive. The picture from MidNite showing it is possible. I will wait For more inf. Thank you the input.

Does it work on the mnedc125rts? I guess get those working first before you add the mnedc250rt for the rosie?

#89

The Rosie / Re: Rosie Remote trip breakers...

Last post by Brucey - October 16, 2025, 04:50:11 PM

I did my search, what I need is (3) MN125rts and (3) MNBDM-48v. But the MNBDM, still working? Before starting buying I need confirmation this setting will be available to work.
Thank you for the suggestion and inputs.

From what I can tell, one or more birdhouses initiate the signal over cat 5 to one or more mnbdms, to which the shunt trip breakers are connected. What's not clear to me is if/how many you can parallel multiple shunt trip breakers to a single mnbdm board. I would call or email Midnite to see.

Yes I have the MNBirdhouse connected to MNPV8HV-DLTL. But Rosie still alive. The picture from MidNite showing it is possible. I will wait For more inf. Thank you the input.

The BIRD HOUSE system was discontinued and last I checked all spare parts are used up.  No plans on more...
Very little support available on any existing NOS you find. Only one person (me) left with any trouble-shooting knowledge...
CAUTION - The Remote Trip breakers can not be used with a switch of any kind, they use an electronic device to apply a 1/10th second pulse, much longer Will burn out the trip coil....   
JAMES

Thanks for the info James. Is it possible to connect multiple midnite shunt trip breakers to the output of the MNBDM-48v? Say four of them? Any limits?

#90

The Rosie / Re: Rosie Remote trip breakers...

Last post by Wizbandit - October 16, 2025, 04:16:20 AM

I did my search, what I need is (3) MN125rts and (3) MNBDM-48v. But the MNBDM, still working? Before starting buying I need confirmation this setting will be available to work.
Thank you for the suggestion and inputs.

From what I can tell, one or more birdhouses initiate the signal over cat 5 to one or more mnbdms, to which the shunt trip breakers are connected. What's not clear to me is if/how many you can parallel multiple shunt trip breakers to a single mnbdm board. I would call or email Midnite to see.

Yes I have the MNBirdhouse connected to MNPV8HV-DLTL. But Rosie still alive. The picture from MidNite showing it is possible. I will wait For more inf. Thank you the input.

The BIRD HOUSE system was discontinued and last I checked all spare parts are used up.  No plans on more...
Very little support available on any existing NOS you find. Only one person (me) left with any trouble-shooting knowledge...
CAUTION - The Remote Trip breakers can not be used with a switch of any kind, they use an electronic device to apply a 1/10th second pulse, much longer Will burn out the trip coil....   
JAMES