dusball
New Member
Thanks for looking.
I really have avoided coming here but I'm out of options- Internet has been no help; Seplos has been no help.
Small bit of background:
Off Grid for 14 years, from a previous Solar on-grid system for 12 years before that. This is not my first rodeo- I dont know everything but I not a complete NooB either.
I recently ordered a DIY Mason System from China- with a Seplos BMS 16S when it was time to change out the electrolyte on my Nickel Iron batteries. {Getting a little old to toss around 85lbs blocks while being very careful not to break the fragile plastic shell./by myself}
Assembled and Installed in my system - ran great for about 3 months. No issues whatsoever.
However, the SOC was never quite right- so I decided to run it up to a full state of charge and recalibrate it to 100%, but it never got fully there before the OVP kicked in on one of the cells(#4). Stopped that activity since now it seems they need to be balanced and the onboard active balancer didnt seem to be working well enough to stop that. ( I ordered a battery tester and it just arrived)
------After that, is where the problem started. -----
The Battery system will charge- i see the MOSFETs(charge discharge) come on from the BMS-Studio.
However----->The instant the system sees a discharge - it shuts down- completely shuts down screen dark, BMS-Studio offline.
The only way to wake it back up is put a charge on it. Then it miraculously comes back to life.
What I have done so far:
1. I've reset all the parameters to default;
2. upgraded the firmware to 1.3 from 1.1
3. Called- emailed-what'sapp -messaged - Web messaged -multiple times over a two week period to Seplos; and after the 2 weeks they finally got back to me-several emails to me with questions and sent them my history logs- and then they stopped responding at all. No help at all. Crickets..
4. Stared at the BMS-studio screen while its charging trying to tease something out of it that will help me identify the problem.
finally notice something that I think might be part of the problem.
For some reason the Total Discharge capacity is 0.
Here are the logs of when I start to discharge. You see it shuts off instantly. Standby meaning sleep mode.
Could it be it thinks there is no capacity to use, so it shuts down??
You might say discharge it to charge it 100% and this discharge it to 0%-in order to reset it - but it the BMS wont let me discharge any percent. nothing/nada
The only way for me to pull any current out of the bank is to bypass the BMS. Which is far from ideal.
There doesnt seem to be anyway that I can think of to reset the "total discharge capacity" to see if that's the issue.
Meanwhile based on my experience with Seplos I ordered a JK BMS. which is taking forever to get here.
I'm not saying this BMS is toast or that they make bad gear but so far experience with tech support has not been that great- and I rarely if ever call anybody for help for anything- but in its current state I cant use it. Tech support has never been a reason for me not to buy something.
Being off grid- having full use batteries to keep the home happy is absolutely necessary.
The old nickel irons worked great but they wont hold a charge now- and well...its a long story..
I am open to ideas to try- more questions to make me think- at this point anything is better than me poking it with a sharp stick.
Thanks in advance
I really have avoided coming here but I'm out of options- Internet has been no help; Seplos has been no help.
Small bit of background:
Off Grid for 14 years, from a previous Solar on-grid system for 12 years before that. This is not my first rodeo- I dont know everything but I not a complete NooB either.
I recently ordered a DIY Mason System from China- with a Seplos BMS 16S when it was time to change out the electrolyte on my Nickel Iron batteries. {Getting a little old to toss around 85lbs blocks while being very careful not to break the fragile plastic shell./by myself}
Assembled and Installed in my system - ran great for about 3 months. No issues whatsoever.
However, the SOC was never quite right- so I decided to run it up to a full state of charge and recalibrate it to 100%, but it never got fully there before the OVP kicked in on one of the cells(#4). Stopped that activity since now it seems they need to be balanced and the onboard active balancer didnt seem to be working well enough to stop that. ( I ordered a battery tester and it just arrived)
------After that, is where the problem started. -----
The Battery system will charge- i see the MOSFETs(charge discharge) come on from the BMS-Studio.
However----->The instant the system sees a discharge - it shuts down- completely shuts down screen dark, BMS-Studio offline.
The only way to wake it back up is put a charge on it. Then it miraculously comes back to life.
What I have done so far:
1. I've reset all the parameters to default;
2. upgraded the firmware to 1.3 from 1.1
3. Called- emailed-what'sapp -messaged - Web messaged -multiple times over a two week period to Seplos; and after the 2 weeks they finally got back to me-several emails to me with questions and sent them my history logs- and then they stopped responding at all. No help at all. Crickets..
4. Stared at the BMS-studio screen while its charging trying to tease something out of it that will help me identify the problem.
finally notice something that I think might be part of the problem.
For some reason the Total Discharge capacity is 0.
Here are the logs of when I start to discharge. You see it shuts off instantly. Standby meaning sleep mode.
Could it be it thinks there is no capacity to use, so it shuts down??
You might say discharge it to charge it 100% and this discharge it to 0%-in order to reset it - but it the BMS wont let me discharge any percent. nothing/nada
The only way for me to pull any current out of the bank is to bypass the BMS. Which is far from ideal.
There doesnt seem to be anyway that I can think of to reset the "total discharge capacity" to see if that's the issue.
Meanwhile based on my experience with Seplos I ordered a JK BMS. which is taking forever to get here.
I'm not saying this BMS is toast or that they make bad gear but so far experience with tech support has not been that great- and I rarely if ever call anybody for help for anything- but in its current state I cant use it. Tech support has never been a reason for me not to buy something.
Being off grid- having full use batteries to keep the home happy is absolutely necessary.
The old nickel irons worked great but they wont hold a charge now- and well...its a long story..
I am open to ideas to try- more questions to make me think- at this point anything is better than me poking it with a sharp stick.
Thanks in advance
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