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#41

The Rosie / Re: AC Output Voltage

Last post by bigbillsd - April 27, 2026, 11:19:12 AM

My question is how is this supposed to work with the Rosie.  I am not worried about voltage drop.   

#42

The Rosie / Re: AC Output Voltage

Last post by ClassicCrazy - April 27, 2026, 11:07:28 AM

Here is a voltage drop calculator.
You didn't say how long your cord is or how many amps it is carrying.
Use this calculator to figure out what size wire you would need to use.
https://www.southwire.com/calculator-vdrop

I don't really understand what you are trying to do ? Charge batteries from grid power ?

Larry

#43

The Rosie / AC Output Voltage

Last post by bigbillsd - April 27, 2026, 10:57:39 AM

I have a fairly long extension cord feeding my motorhome while its in front of the S&B. It starts out at 119v at the plug inside and apparently its 112v after the long 14 gauge cord.

My assumption would be that Rosie would step up that voltage to 120v, but according to SA its sending 112v into the motorhome.  Is this due to using a Y cable to connect the power to the Rosie on L1 & L2? Or is this just how it works. 
I have made a special cable that does not share the power to L2, would that change the results? I am not using that cable as that requires I remove my Power Watchdog from the shore power circuit.  it would see power on just one leg and turn everything off due to that being a Fault. 

#44

The "Classic" charge controller / Re: Classic data on Home Assis...

Last post by ClassicCrazy - April 26, 2026, 09:44:09 AM

Good morning! I'll certainly look into that project.

In the mean time, and for your info, I just released v1.2.0 that adds a button to write registers content to EEPROM so changes resist a controller reboot or total shutdown. I also added a switch to turn the controller On/Off the same way MNGP does it through MODE ➔ On/Off.

Regards,

Daniel.

I did the updates - nice to have it on Home Assistant since it makes all those so easy to do.
Larry

#45

General info / Re: Midnite Classic data to Ho...

Last post by qcda1 - April 24, 2026, 09:46:54 AM

Again a new v1.2.0 release that adds a button to write registers content to EEPROM so changes resist a controller reboot or total shutdown. I also added a switch to turn the controller On/Off the same way MNGP does it through MODE ➔ On/Off.

https://github.com/qcda1/ha_midnite_classic

#46

The "Classic" charge controller / Re: Classic data on Home Assis...

Last post by qcda1 - April 24, 2026, 09:45:17 AM

Good morning! I'll certainly look into that project.

In the mean time, and for your info, I just released v1.2.0 that adds a button to write registers content to EEPROM so changes resist a controller reboot or total shutdown. I also added a switch to turn the controller On/Off the same way MNGP does it through MODE ➔ On/Off.

Regards,

Daniel.

#47

The Rosie / Re: Rosie 7048M installed and ...

Last post by bigbillsd - April 21, 2026, 10:48:58 AM

I am Very happy that the Rosie is putting out very little heat!  I never really knew our inverters output went down considerably till I started researching my replacement options late last year.   

I mounted a temperature probe right above the Rosie so the Cerbo can log the temps and alert if they get too high for me. 

BTW, did the new firmware help with your genny issues?  My old (2006) QD7500 worked flawlessly when I tested it for a few hours charging them.   

#48

The Rosie / Re: Rosie 7048M with Grid Supp...

Last post by bigbillsd - April 21, 2026, 10:43:33 AM

My suggestion is if you are going to plug into 120 you use a dogbone adapter from 50Amps to 30Amps and another to 20A this will apply 120V to L1 and L2 then it will behave more like you anticipate

That was how I was testing it.   Using a standard Dogbone as a Y adapter feeding both L1 & L2.   I have made a special adapter that will only feed 120v to L1.  No L2 so the Rosie can still make 240v when needed. I probably wouldn't need that adapter till I can afford that Wolf Induction Cooktop of my wifes dreams... 

#49

The Rosie / Re: Rosie 7048M with Grid Supp...

Last post by FNG - April 21, 2026, 07:00:08 AM

Essentially the "Only" thing you should need to fiddle with is the AC BREAKER SIZE in the AC Input menu as you change where you are plugged in. As Jim pointed out the Rosie will limit that to about 75% but you stated 120V in so that adds a level of information to it. Remember Rosie is split phase and each phase does its thing so if you had breaker size set to 10A and L1 is drawing 7A AC it should be teetering on the edge of using some battery. But keep in mind if L1 and L2 are doing 5A AC that is really 10A AC o L1 if you have 120 only coming in. My suggestion is if you are going to plug into 120 you use a dogbone adapter from 50Amps to 30Amps and another to 20A this will apply 120V to L1 and L2 then it will behave more like you anticipate

#50

The Rosie / Re: Rosie 7048M with Grid Supp...

Last post by bigbillsd - April 19, 2026, 10:41:25 AM

Its another $207 but potentially could add a second mngp2 to have upstairs so you dont have to dive in to the basement all the time. Or just move your current mngp2 upstairs. 

I just purchased a second one, even then, having to fiddle with it often seems a bit odd.  And getting the wire up to the cabinet I want to put it to replace the Magnum Remote will not be fun.