diy solar

diy solar

OverkillSolar app - some new user questions

beo

all be good
Joined
May 16, 2024
Messages
37
Location
Poland
Hello all!
In another topic I probably made some mistakes while writing, so here I will try to correct myself. My bms in the 50Ah battery I bought not long ago is the model The application overkiller solar seems, very well working, however, I do not quite know if all the data contained in the BMS, are properly implemented by the manufacturer, so I am posting screenshots from the application. In addition, why is it that certain functions in this application, are marked as active, and in others like AoLithium, XiaoXiang, are marked as disabled? Thanks in advance for any answer or direction. Best regards!
 

Attachments

  • 1.jpg
    1.jpg
    85.5 KB · Views: 13
  • 2.jpg
    2.jpg
    81.4 KB · Views: 13
Last edited:
Now wanting to change the balancing setting only during charging, the battery according to the application from 50% of the available capacity, has 30% What happened? Maybe the seller sold batteries with an already smaller capacity, but tried to camouflage it. Would it be possible ?
 
Last edited:
Hi beo. Welcome to the forum! I have read your posts in both threads and would like to help you if I can.

Below is what I understand about your battery, BMS, and app. Please confirm the information, or provide corrections if I have it wrong.

1) You have a 12V 50Ah LFP battery from MavericEnergy
2) The BMS in the battery is a JBD BMS with bluetooth
3) You are now connecting to the BMS with the Overkill Solar app (this is a good app to use)
4) The battery is working, but you are concerned about BMS settings

If this is all correct, my first question to you is what made you have concerns about the BMS settings (meaning is the battery not performing to specification, or are you curious and just want to understand the settings)?

[I hope this translates well for you. If any sentence is confusing, let me know and I will try to reword it.]

*I am going to ask a moderator to move this thread to the BMS subforum.
 
Last edited:
  • Quick react
Reactions: beo
Hello! Thank you very much for your interest. The battery is working and everything seems to be fine, and it is just a matter of understanding the settings. Although I am slowly starting to learn by gathering information from your forum. What I am most interested in is, could the vendor have misled me with the proper adjustments in the BMS? Yesterday's sudden drop in SOC after adjusting the balancer option, surprised me a lot. However, I charged the battery to 14.2V and after I finished charging, I saw the balancer tripping green after a few minutes. The SOC looks to be 100%, so it's possible that nothing bad happened by my actions.
 
Hello! Thank you very much for your interest. The battery is working and everything seems to be fine, and it is just a matter of understanding the settings. Although I am slowly starting to learn by gathering information from your forum. What I am most interested in is, could the vendor have misled me with the proper adjustments in the BMS? Yesterday's sudden drop in SOC after adjusting the balancer option, surprised me a lot. However, I charged the battery to 14.2V and after I finished charging, I saw the balancer tripping green after a few minutes. The SOC looks to be 100%, so it's possible that nothing bad happened by my actions.
It’s common for the state of charge reading to change abruptly after making a settings change. It needs to see a discharge followed by a complete charge to reset. Once you have your system working without making any more changes, it will act as expected.
 
  • Quick react
Reactions: beo
You are certainly right, and I am not needlessly looking for trouble by force. I will do one more battery cycle and give it a rest, for it is to serve when it is really needed. Once again, thank you very much for your interest.

@Bob142 The answer to all of your points is yes. It's hard for me to find now, but somewhere I saw inf that under Windows with bluetooth, you can get more precise information. Can he give me the name of the application? I generally work on Linux, but I would like to have continuous monitoring of the battery, and through the phone it is not quite possible. Xiaomi crashes apps pretty quickly.
Okay I find the BMS Tools in GIT source, so I check it.
 
Last edited:
When you change parameters and write them to the BMS it does a reset and uses the cell voltage to guess at % SOC. As you have found out, when you get it charged up, it restarts the tracking %.
 
And it is possible that the application misinterpreted the indications? I received a recording of one discharge under over-temperature conditions, which is simply not possible, since the ambient temperature is 19 degrees and the discharge current is 4.5A - 5A
 
"Xiaomi crashes apps pretty quickly". I would drop that app and get the Overkill Solar app, it works better for me.
 
  • Quick react
Reactions: beo
I was talking about the phone, from Xiaomi. The manufacturer is very strict about running applications in the background, so app like Overkill, is quickly closed. The use of padlocks, permits, changes nothing in Andorid. @TacomaJoe And could you gentlemen take a look at the screenshots above of the settings in the OverkillSolar app? Does everything match up there, and should it stay that way? The app shows me 95% loaded capacity, with a total voltage of 13.49V, and 3.372V for a single cell.

Ok as for the voltages and SOC reference, everything seems to be ok, just as someone could still take a peek at my app settings screenshots to see if they are ok
 
Last edited:
I'm travelling but will be home tomorrow. I can check my settings and post some screenshots. I'm not sure about the over temperature event, best guess would be a wire connector made poor contact for a moment.
 
  • Quick react
Reactions: beo
Back
Top