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#91
Hawke's Bay / Re: Float time
Last post by ClassicCrazy - March 29, 2026, 10:25:28 AMI had done the factory reset so I should be good in that respect.
My battery voltage last night only got down to 53.1v so the 52.5v Rebulk was not low enough to trigger the Bulk this morning. I had my heat pump running all night too. Since it is still fairly cold out I don't have my refrigeration loads running ( they are in unheated shed). So more loads coming soon as it warms up outside again.
I set Rebulk now to 53.2v and will see tomorrow how it goes. I also set Float Time to 0.1 .
I guess it is good that I have so much battery that some loads never take the voltage down too much !
Larry
My battery voltage last night only got down to 53.1v so the 52.5v Rebulk was not low enough to trigger the Bulk this morning. I had my heat pump running all night too. Since it is still fairly cold out I don't have my refrigeration loads running ( they are in unheated shed). So more loads coming soon as it warms up outside again.
I set Rebulk now to 53.2v and will see tomorrow how it goes. I also set Float Time to 0.1 .
I guess it is good that I have so much battery that some loads never take the voltage down too much !
Larry
#92
The Rosie / Pros and Cons of Closed/Open L...
Last post by bigbillsd - March 29, 2026, 09:33:02 AMHi, I have installed Solar Assistant (SA) after watching Ryan's webinar and its working great. Now I am looking into getting the Batteries in there (4 ECO-LFP480002). That led me to wonder if I should do closed Loop (CL) or not (assuming CL would give me a view into all the batteries in SA) add another CAN to USB for the SA raspberry.
Those Eco's are PYLON so it might work..
Currently the comm's are not fully understood.
What I have read is if I can do closed loop, that will take care of all the battery settings for the Rosie, which sounds pretty good to me. And as a potential added bonus it might populate SA for me.
What are the Con's to using the Rosie in a Closed Loop?
-Bill
Those Eco's are PYLON so it might work..
Currently the comm's are not fully understood.
What I have read is if I can do closed loop, that will take care of all the battery settings for the Rosie, which sounds pretty good to me. And as a potential added bonus it might populate SA for me.
What are the Con's to using the Rosie in a Closed Loop?
-Bill
#93
The Rosie / Re: Parallel Rosies not sharin...
Last post by Wizbandit - March 29, 2026, 06:11:14 AMQuote from: Wirenut on March 11, 2026, 09:27:10 PMI have an off grid system installed with 2 Rosie inverters in parallel. The AC input is a 14 kW generator. When generator charging the Rosies don't share equally. Also, sometimes, not long after a generator auto start charge cycle is completed there is a fault code for AC overload on L1.
I've attached 3 pictures. One shows the FW in each component. Left and Right are two different MNGP2 displays. Master is the master Rosie. Rosie is the slave Rosie.
The others pictures are summary's of the inverters activity on the same day when a generator auto start occurred to charge the batteries. As you can see, one Rosie took in over 7,000 watts for long enough to take in over 49 kWh. The other Rosie shows all zeros for the same day.
I thought maybe the parallel threshold was set to high at 40% but I didn't think that affected charging, just inverting. I changed the parallel threshold down to 25%. At the time the generator wasn't running and total load on the inverters was about 1 kW. When I lowered it to 25% the slave inverter came on which seemed strange with such a low load.
Any ideas are appreciated. I don't know if this is multiple problems or if they are related.
Thanks for your help.
"Stacked" Rosie inverters do not share loads ( and apparently charging) equally when there is AC IN I'm told. Things like AC IN wire lengths may cause voltage drops between inverters and the balance issues. To properly balance AC IN operations (and SELL MODE, which is not yet available) will take "Closed Loop" communications between all inverters which does not happen with the present firmwares...
We can hope the engineers will find time to add this feature in the future but it does not seem to be effecting very many installations right now so it's low priority.
#94
Hawke's Bay / Re: Float time
Last post by Wizbandit - March 29, 2026, 06:00:53 AMFYI - We have discovered with certain firmware updates if you don't do a "Set Device to Defaults" or even better "Set SYSTEM to Defaults" you may get erratic operations. ALL MNCANBUS connected devices MUST be turned ON for the system reset to be effective.
#95
The "Classic" charge controller / Re: Getting a classic to commu...
Last post by jjjj - March 29, 2026, 05:14:19 AMSo I finally was able to get a router set up for my Home Assistant configuration and plugged in the Cerbo and Midnite Classic 150. I did include the code above and it works very nicely! Thank you again. I did make one update and included scan_interval: 5 for each of the elements to encourage an update every 5 seconds and it works nicely.
Again, thank you very much!
Again, thank you very much!
#96
Hawke's Bay / Re: Float time
Last post by ClassicCrazy - March 29, 2026, 01:48:26 AMI asked Gemini AI about the reason float doesn't change. Here is what it said .
Gemini said......
"It definitely sounds like a significant logic shift in the new firmware. In previous versions, Midnite controllers often used a "New Day" trigger simply based on the PV input dropping to zero (Resting) and then seeing voltage again the next morning.
In the new linked firmware, they seem to have shifted to a "Voltage-Driven" reset. This is common in newer lithium-focused profiles to prevent the system from forced-charging the batteries to Absorb levels every single morning if they only discharged 1% or 2% overnight.
Here is why your specific setup was affected by this change:
Massive Bank Capacity: Because you have a 1,608Ah bank, your overnight voltage drop is incredibly shallow.
Minimal Sag: Your history shows the batteries stayed at or above 53.0V all night.
The Lockout: With the Rebulk set at 48.0V, the controller "wakes up," sees 53.0V, and assumes no significant work was done yesterday, so it stays in Float to protect the cells.
By raising that Rebulk to 52.0V or 52.5V, you are telling the firmware: "If the battery is anywhere below full charge voltage, I want a fresh Bulk cycle."
Quick Tip for Tomorrow Morning: Once you change that setting, the Hawkes Bay should catch it immediately when the sun comes up. If you want to be extra sure, you can check the "Status" screen on the MNGP2 early tomorrow. It should show Bulk MPPT instead of starting in Float."
I just changed the Rebulk to 52.5v so will see how that works out in the morning . I just never paid attention to Rebulk in the past but I guess it matters now
Larry
Gemini said......
"It definitely sounds like a significant logic shift in the new firmware. In previous versions, Midnite controllers often used a "New Day" trigger simply based on the PV input dropping to zero (Resting) and then seeing voltage again the next morning.
In the new linked firmware, they seem to have shifted to a "Voltage-Driven" reset. This is common in newer lithium-focused profiles to prevent the system from forced-charging the batteries to Absorb levels every single morning if they only discharged 1% or 2% overnight.
Here is why your specific setup was affected by this change:
Massive Bank Capacity: Because you have a 1,608Ah bank, your overnight voltage drop is incredibly shallow.
Minimal Sag: Your history shows the batteries stayed at or above 53.0V all night.
The Lockout: With the Rebulk set at 48.0V, the controller "wakes up," sees 53.0V, and assumes no significant work was done yesterday, so it stays in Float to protect the cells.
By raising that Rebulk to 52.0V or 52.5V, you are telling the firmware: "If the battery is anywhere below full charge voltage, I want a fresh Bulk cycle."
Quick Tip for Tomorrow Morning: Once you change that setting, the Hawkes Bay should catch it immediately when the sun comes up. If you want to be extra sure, you can check the "Status" screen on the MNGP2 early tomorrow. It should show Bulk MPPT instead of starting in Float."
I just changed the Rebulk to 52.5v so will see how that works out in the morning . I just never paid attention to Rebulk in the past but I guess it matters now
Larry
#97
Hawke's Bay / Re: Float time
Last post by aaapilot - March 28, 2026, 12:41:00 PMQuote from: ClassicCrazy on March 28, 2026, 11:36:08 AMA new day and my Hawkes Bay did not start the day out in Bulk and instead is in Float again.The Bulk Stage yesterday was when I forced it into Bulk .
Larry
Hey Larry, YES, my system has done the same since I updated both the HB and MNGP2 to latest Production firmware. Don't know which contains the bug. HB is on 26.1.14 and MNGP2 on 26.1.5. System stays in FLOAT mode since my full manual charge on Monday, 6 days and counting. I run Open loop, float set at 54.2v for 2 hours. System is at 53.2v now.
#98
Hawke's Bay / Re: Float time
Last post by ClassicCrazy - March 28, 2026, 11:36:08 AMA new day and my Hawkes Bay did not start the day out in Bulk and instead is in Float again.The Bulk Stage yesterday was when I forced it into Bulk .
here is video of settings https://youtu.be/h3qeo5IqNJ4
this is video of forcing HB to Bulk - ignore the SOC since that isn't accurate
https://youtu.be/cF21yvK4P7U
Larry
here is video of settings https://youtu.be/h3qeo5IqNJ4
this is video of forcing HB to Bulk - ignore the SOC since that isn't accurate
https://youtu.be/cF21yvK4P7U
Larry
#99
Online Training sessions / Re: NABCEP CREDIT Design and A...
Last post by Sunshine - March 27, 2026, 12:26:35 PMIf you missed the webinar you can rewatch the recorded version here
https://attendee.gotowebinar.com/recording/7582209549683993346
https://attendee.gotowebinar.com/recording/7582209549683993346
#100
Hawke's Bay / Float time
Last post by ClassicCrazy - March 27, 2026, 11:17:59 AMI have Hawkes Bay and Little Rosie .
Before I linked them together I would see two different battery charge setpoint screens on the MNGP2. One of them was under Setup / Battery . The other was in Inverter / Little Rosie menu.
When I linked them together - meaning I pressed the MNGP buttons to link them, the battery setup screen for Little Rosie went away and I just have the Setup / Battery screen.
My understanding was that before linking -the Hawkes Bay charge setpoints were from Setup/ Battery settings and the Little Rosie charge setpoints were from Inverter / Little Rosie charge setpoints.
Now I have the Little Rosie and the Hawkes Bay linked together and I only have one Setup / Battery menu to change the battery charge setpoints and those settings are now I believe common to both the Hawkes Bay and Little Rosie.
But since the last firmware update I did , my Hawkes Bay is not coming out of Float in the morning. There is a Float Time setting in the Battery menu and it defaulted to 24 hours. I just ignored that because I don't ever charge batteries using the Little Rose on AC input. I only charge using PV from Hawkes Bay.
This morning my Hawkes Bay was in float - it never went to Bulk at all after the night.
The other day when the Hawkes Bay did not start bulk I suspected maybe that Float Time was holding it back. I changed the Float Time from 24 hours to 7 hours. On many days my Hawkes Bay might be in Float that long now that we have longer daylight.
This morning my Hawkes Bay was in Float . Below is a graph of the status . Yesterday started out with some sun, then clouded up. The Hawkes Bay started in Float mppt , then went to float, then back to Float mppt, then back to Float then eventually as night came it went to Resting and this morning started out in Float Mppt , then Float .
The battery voltage was low enough that this morning the Hawkes Bay should have started out in Bulk like any controller usually does first thing in the morning. I had to force it to Bulk in the MNGP2 menu.
If I add up all the Float times in the history graph from yesterday they don't add up to 7 hours. Total of Float mppt times were longer than Float but don't seem to be counted in to the Float Total.
Will setting Float timer to Zero change the Hawkes Bay to ignore Float Time and go back to running on a regular cycle such as Bulk to start day, Absorb according to setpoints and Absorb Time, then go to Float( and or Float Mppt ) the rest of the day and start a brand new Bulk cycle the next morning ?
I know this probably sounds hard to follow . I wouldn't have known what was happening if I didn't have the graph of charge stage history. The purple at the very end of the graph is where I just forced HB to Bulk.
Larry
Before I linked them together I would see two different battery charge setpoint screens on the MNGP2. One of them was under Setup / Battery . The other was in Inverter / Little Rosie menu.
When I linked them together - meaning I pressed the MNGP buttons to link them, the battery setup screen for Little Rosie went away and I just have the Setup / Battery screen.
My understanding was that before linking -the Hawkes Bay charge setpoints were from Setup/ Battery settings and the Little Rosie charge setpoints were from Inverter / Little Rosie charge setpoints.
Now I have the Little Rosie and the Hawkes Bay linked together and I only have one Setup / Battery menu to change the battery charge setpoints and those settings are now I believe common to both the Hawkes Bay and Little Rosie.
But since the last firmware update I did , my Hawkes Bay is not coming out of Float in the morning. There is a Float Time setting in the Battery menu and it defaulted to 24 hours. I just ignored that because I don't ever charge batteries using the Little Rose on AC input. I only charge using PV from Hawkes Bay.
This morning my Hawkes Bay was in float - it never went to Bulk at all after the night.
The other day when the Hawkes Bay did not start bulk I suspected maybe that Float Time was holding it back. I changed the Float Time from 24 hours to 7 hours. On many days my Hawkes Bay might be in Float that long now that we have longer daylight.
This morning my Hawkes Bay was in Float . Below is a graph of the status . Yesterday started out with some sun, then clouded up. The Hawkes Bay started in Float mppt , then went to float, then back to Float mppt, then back to Float then eventually as night came it went to Resting and this morning started out in Float Mppt , then Float .
The battery voltage was low enough that this morning the Hawkes Bay should have started out in Bulk like any controller usually does first thing in the morning. I had to force it to Bulk in the MNGP2 menu.
If I add up all the Float times in the history graph from yesterday they don't add up to 7 hours. Total of Float mppt times were longer than Float but don't seem to be counted in to the Float Total.
Will setting Float timer to Zero change the Hawkes Bay to ignore Float Time and go back to running on a regular cycle such as Bulk to start day, Absorb according to setpoints and Absorb Time, then go to Float( and or Float Mppt ) the rest of the day and start a brand new Bulk cycle the next morning ?
I know this probably sounds hard to follow . I wouldn't have known what was happening if I didn't have the graph of charge stage history. The purple at the very end of the graph is where I just forced HB to Bulk.
Larry