Recent posts

#1

The Rosie / Re: eco-worthy communication?

Last post by mahendra - November 13, 2025, 12:30:01 PM

Midnite did say it will speak to anything pylon.

#2

MNPowerFlo5 / Re: DoA PF5?

Last post by mahendra - November 13, 2025, 12:25:35 PM

what are you trying to connect again ?
This document says to use regular cat5 cables . The only exception is if you only use two wires for the battery . It is documented here - but maybe that is what you already talked about  ?
file attached

Yes, Ryan did warn about this. I made my cable; two wires only, pins 5 and 6 if I recall correctly.
Two wires as per the pinout in the document above, but note that if you are using Solar Assistant, there are some errors in the documentation. Check with Midnite to be sure.

#3

MNPowerFlo5 / Re: DoA PF5?

Last post by BlackwaterPark - November 13, 2025, 10:56:00 AM

what are you trying to connect again ?
This document says to use regular cat5 cables . The only exception is if you only use two wires for the battery . It is documented here - but maybe that is what you already talked about  ?
file attached

I'm trying to connect Rosie to a bank of powerflo5s. I did get the proper pinout from midnite power for those batteries, at least for the battery end, and they told me to ask someone at midnite solar for the proper pinout on the inverter end, which i'm waiting to hear back on. I'll likely not have to worry about the grounding part of it, as i've decided to keep this system with a floating neutral, as I've been running for 13 years with my other system here. The thing that gets me in the doc you linked is that they explicitly term you to use the cable that comes with the battery, and when you talk to the guys who make the battery, they are telling me to most definitely NOT use that cable. It's like these guys don't talk to each other at all.

The Rosie end should be the same - pins 4 and pins 5 . I don't have a Rosie but doesn't that have a MNGP2 or does it have it's own canbus jack ? I was looking in the manuals for pinout for the MNGP2 but didn't find it. But I do have the Midnite canbus document and it has all the pins labeled.
Here is what it says

"Basic CANBUS Information
Physical Pinout
The MNCANBUS interface on MidNite devices is accessible via an RJ45 jack. There are two of these
jacks, but they are tied together so the nets are the same regardless of which one is used. The important
pins are CAN HI (Pin 4), CAN LO (Pin 5), and GND (Pin . All other pins are used for other
communications on MidNite devices and should be left floating. Connecting these other nets to
anything could produce system communication errors. "

I think I have seen past post where Ryan said just to try using pins 4 and 5 and skip the ground. I think that is what was also showed for using it with Solar Assistant.
Larry

Yes, I got an email from Ryan saying exactly that, to just open up the supplied cable and cut and isolate the orange, brown, and green pair, so i'm going to try that tonight. It sounds like that's also what will work with the solar assistant then? I've got three more cables i can do that to, and was planning on getting the SAv anyway.

#4

System Design and Layout / Is anyone using a Rosie to pow...

Last post by bigbillsd - November 12, 2025, 11:12:32 PM

I had been looking at a big Rosie to upgrade my motorhome to 48v and run both sides of my circuit panel so I can run anything in the coach from my batteries while boondocking. 

I am having a hard time finding anyone doing this, or even using a Big Rosie in a motorhome.

I put this in the design & layout forum thinking someone has done this successfully..

-Bill

[before]

#5

MN15-12KW-AIO / AIO Installer feedback

Last post by openplanet - November 12, 2025, 12:17:45 PM

Is there an easy way to tell whether an AIO was manufactured before or after they incorporated the installer feedback mentioned in a couple of the Webinars?

#6

MNPowerFlo5 / Re: DoA PF5?

Last post by ClassicCrazy - November 12, 2025, 11:20:21 AM

what are you trying to connect again ?
This document says to use regular cat5 cables . The only exception is if you only use two wires for the battery . It is documented here - but maybe that is what you already talked about  ?
file attached

I'm trying to connect Rosie to a bank of powerflo5s. I did get the proper pinout from midnite power for those batteries, at least for the battery end, and they told me to ask someone at midnite solar for the proper pinout on the inverter end, which i'm waiting to hear back on. I'll likely not have to worry about the grounding part of it, as i've decided to keep this system with a floating neutral, as I've been running for 13 years with my other system here. The thing that gets me in the doc you linked is that they explicitly term you to use the cable that comes with the battery, and when you talk to the guys who make the battery, they are telling me to most definitely NOT use that cable. It's like these guys don't talk to each other at all.

The Rosie end should be the same - pins 4 and pins 5 . I don't have a Rosie but doesn't that have a MNGP2 or does it have it's own canbus jack ? I was looking in the manuals for pinout for the MNGP2 but didn't find it. But I do have the Midnite canbus document and it has all the pins labeled.
Here is what it says

"Basic CANBUS Information
Physical Pinout
The MNCANBUS interface on MidNite devices is accessible via an RJ45 jack. There are two of these
jacks, but they are tied together so the nets are the same regardless of which one is used. The important
pins are CAN HI (Pin 4), CAN LO (Pin 5), and GND (Pin . All other pins are used for other
communications on MidNite devices and should be left floating. Connecting these other nets to
anything could produce system communication errors. "

I think I have seen past post where Ryan said just to try using pins 4 and 5 and skip the ground. I think that is what was also showed for using it with Solar Assistant.
Larry

#7

MNPowerFlo5 / Re: DoA PF5?

Last post by BlackwaterPark - November 11, 2025, 09:14:07 PM

what are you trying to connect again ?
This document says to use regular cat5 cables . The only exception is if you only use two wires for the battery . It is documented here - but maybe that is what you already talked about  ?
file attached

I'm trying to connect Rosie to a bank of powerflo5s. I did get the proper pinout from midnite power for those batteries, at least for the battery end, and they told me to ask someone at midnite solar for the proper pinout on the inverter end, which i'm waiting to hear back on. I'll likely not have to worry about the grounding part of it, as i've decided to keep this system with a floating neutral, as I've been running for 13 years with my other system here. The thing that gets me in the doc you linked is that they explicitly term you to use the cable that comes with the battery, and when you talk to the guys who make the battery, they are telling me to most definitely NOT use that cable. It's like these guys don't talk to each other at all.

#8

MNPowerFlo5 / Re: DoA PF5?

Last post by ClassicCrazy - November 11, 2025, 05:53:22 PM

The Midnite battery canbus jack uses pin 4 Can high and pin 5 can low

#9

MNPowerFlo5 / Re: DoA PF5?

Last post by ClassicCrazy - November 11, 2025, 05:43:04 PM

what are you trying to connect again ?
This document says to use regular cat5 cables . The only exception is if you only use two wires for the battery . It is documented here - but maybe that is what you already talked about  ?
file attached

#10

MNPowerFlo5 / Re: DoA PF5?

Last post by ClassicCrazy - November 11, 2025, 05:19:40 PM

Do you have the pinouts of the batteries and of the Rosie ?
Should be easy to make your own cable .
Larry

I don't as of yet. I guess i'll go buy a crimping tool this week and figure out how to do it, and hopefully not do it incorrectly and short some piece of gear out. I've never done that kind of thing before with cat cables.  I just can't fathom why MS doesn't offer one.

Depending on what you are going to make , you probably don't even need a crimping tool. If the one end is going to an adapter that you just hook up a couple wires, you can cut the end off of a regular piece of cat 5 cable and just connect the wires you need. Seems like most all of these bms , batteries, controllers , seem to use pins 4 and 5 these days. You have to connect up the right two pins for Can High and Can Low. I don't think you even need to hook up a ground but that would be one more wire if you need that.
I forget what you are hooking up , but even if you need and an RJ45 on each end - you can cut into the cable and just cut any wires you don't need or cut and splice any that you need to switch around.
Larry