Another BATRIUM shart

[slimf]

This morning I woke up to this..

I went to bed with a battery near 80%.. and I'm 99% sure the sun wasn't shining overnight - This morning I have a battery at around 67% SOC - But the monitors are falsely reading high voltages - NONE of my cells are unbalanced and NONE are at 4.11 volts.

The batrium has just gone into some sort of spaz attack and is reporting bullshit readings. Im going to reboot it now and I will post up a screenshot post reboot!

Here it is!

All back to normal. Its really concerning that this can happen - Its rare (my system has been alive for over a year and this is the second or third time this has happened). Concerning to say the least.

 

[slimf]

The screwed up thing about this is that it was bleeding off cells it thought were high - but were not, causing, not FIXING an imbalance.

 

[Korishan]

Might be something worth mentioning to Batrium directly. Altho posting here the issues/results is good too.

What's the version of the Batrium main unit, the longmons, etc as well as the firmware revision on them? Might prove useful

Have you been keeping up with firmware updates?

 

[OffGridInTheCity]

If I can pile on....

I haven't had this happen but I do have a shunt that goes haywire on a regular basis - every couple of months. And when it goes to 0% it throws an alarm and all shunt readings cease until I manually reset it.

Here's a typical sequence showing the date, 6am voltage/SoC %.

Notice it's bouncing around 11-14% Feb 22 - 25... and it will do this for months sometimes, but on Feb 27, 28th it dropped from 14% to 5% and now it headed to 0%.

The recalibrate options don't make sense to me and don't seem to do anything - no matter what I set them to. I don't ever do "Bypass" because I don't balance / never reach top most of the year.

 

[slimf]

I have a WM5 - and the latest (2.17.15.0) and the firmware version matches.

 

[jtvt]

I have 2 shunts and 3 pieces of equipment, not including shuntmon/batrium, that calculate SOC. Shuntmon seems to do ok when batteries are cycled to full regularly. If SOC bounces back and forth say from 40% to 80% never reaching full, the shuntmon/batrium can become 10% off compared to the other meters.

 

[slimf]

I have 2 shunts and 3 pieces of equipment, not including shuntmon/batrium, that calculate SOC. Shuntmon seems to do ok when batteries are cycled to full regularly. If SOC bounces back and forth say from 40% to 80% never reaching full, the shuntmon/batrium can become 10% off compared to the other meters.

I only have the one shunt, (Batrium) but I’ve also noticed if SOC doesn’t get to near 100% for a week or so that it is off by some margin.

 

[DG98]

I use a Batrium WM5. Several times it has done sort of the opposite of what yours exhibited. It reports correct voltages, but it suddenly decides to report a totally bogus SOC. I only charge to 4.05v, and when I'm there I show 100% SOC. Every several months, Batrium will show the cells to be in the 3.8v range, but for no apparent reason it will show the SOC to be 90-100%.

In short, I don't trust my Batrium system at all and regret the choice and expense I have put into it. Combined with their discontinuation of the WM5, I am pretty sure I would never use another one of their systems. I am currently working on an expansion for my existing battery pack, so I'll be looking for alternatives now that the MM8 is no longer available from the Batrium website. (They won't admit that it is discontinued, but you have to order two of them at $350+ apiece, then wait 3+ months to get them...so, they may as well not exist.)

Cheers, John

 

[OffGridInTheCity]

I use a Batrium WM5. Several times it has done sort of the opposite of what yours exhibited. It reports correct voltages, but it suddenly decides to report a totally bogus SOC. I only charge to 4.05v, and when I'm there I show 100% SOC. Every several months, Batrium will show the cells to be in the 3.8v range, but for no apparent reason it will show the SOC to be 90-100%.

In short, I don't trust my Batrium system at all and regret the choice and expense I have put into it. Combined with their discontinuation of the WM5, I am pretty sure I would never use another one of their systems. I am currently working on an expansion for my existing battery pack, so I'll be looking for alternatives now that the MM8 is no longer available from the Batrium website. (They won't admit that it is discontinued, but you have to order two of them at $350+ apiece, then wait 3+ months to get them...so, they may as well not exist.)

Cheers, John

I have WM4 + longmons but have the Shut SOC % issue as well.

Here's an example of a 6am snapshot I do each day showing the battery voltage / Soc%. Notice Apr 10 it was 18% but jumped to 0 Apr 11. Also notice that the wild swings in Soc % out of proportion to the battery voltage over the last 8 days after I reset it.

However, I stick with Batrium because it let's me expand my battery bank without having multiple BMSs and the features/reporting are quite detailed. It's easy to reset the Shunt % but it's annoying.