Hubble Batteries

TedLasso said:
Since I can't seem to find any resource or reference, what is considered best practice when it comes to having cycling battery.

How often (per week/month) should the battery reach 100% for cell balancing or whatever to occur?

Likewise, how often should the battery be taken to say 20% (or lower). Does it actually need to get fully discharged? Currently, my SoC is 40% , and the batteries have probably gone down to maybe 35% once in the last three weeks.

How long should the battery be at 100% for the cell balancing to actually take place? FWIW, I have noticed both my batteries reporting 100% SoC and yet energy goes into them from the Grid or solar until something happens that makes them stop accepting any more energy. Is it during this period, when batteries are at 100% but still accepting energy that the cells are balancing?

Al
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I have two friends that have designed bms's and built batteries and i asked them these same questions last year:
1. Batteries should be fully charged at least every 3 days to ensure the voltage difference between the lowest cell and highest cell is as small as possible
2. Yes, you'll see the batteries still absorbing watts at 100% when they are balancing, when it's complete they stop absorbing.

I have 3x AM2's, touch wood haven't had any issues since i bought them Feb 2022, 450 cycles later.
 
Thanks you all. When I get back, will build an automation to charge batteries to 100% every few days , they don't get there unfortunately during winter due to small PV array and workload they support.

Still super worried ,why battery 2 is working so hard. Thanks @xrapidx for the battery thing you shared in the HA or other thread. I also added to my battery card now.

The bottom one tells me when each battery hits 30% , and I can see once again, battery 2 has gone lower than the set overall SoC (40%) - eishScreenshot_20230617_094210_Home%20Assistant.jpg
 
semaphore said:
So it appears the battery that was 47% health upgraded to 98% health after doing a firmware update, its dropped by around 100 mah after 600+ cycles.
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So this naaier battery had to go in for repairs, firmware update was a faux fix. After 6 days it started dropping in health again to 47%.

So in the jungle I must wait until the dice reads five or eight.
 
semaphore said:
So this naaier battery had to go in for repairs, firmware update was a faux fix. After 6 days it started dropping in health again to 47%.

So in the jungle I must wait until the dice reads five or eight.
Click to expand...

Hope they refund you fees if an electrician is paid to remove and add back..
 
Anyone with multiple batteries able to see the difference SOC/V between them? Curious as to how much they fluctuate.
 
xrapidx said:
Anyone with multiple batteries able to see the difference SOC/V between them? Curious as to how much they fluctuate.
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mines right now, but it's from SA. I can't get the granular data via the Sunsynk logger

1689323529520.png


This is from HA graphing them over time (at least the voltage)

1689323630259.png
 
TedLasso said:
mines right now, but it's from SA. I can't get the granular data via the Sunsynk logger

View attachment 1556915


This is from HA graphing them over time (at least the voltage)

View attachment 1556917
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Damn - I thougt mine was bad... (EDIT: I see yours differ in age quite a bit - mine were all bought the same time) I've set up a sensor that tracks the variance. Mine seem to max out at about 10% betweent he four. So this is between the battery with the min SOC - and the battery with the max SOC. (it actually stabilized yesterday after sitting at 100% for a few hours - so will see how it goes - it looks like my one battery was out of sync)

BatteryVariance.PNG

The reason for going down this path is I noticed the inverters SOC reporting was all over the place (even though SA was stable) , jumping by 10% up and down ... which could cause the system to shutdown if it reached 30% and drops to 10% instandtly.

Inverter Varoamnce.PNG

From monitoring for a day or two - it seems like the inverter reported SOC randomly jumps between the maximum and minumum values of the individual batteries - so its most likely either an issue in the inverter software, or how the Hubble BMS reports the values to the inverter (no idea).
 
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TedLasso said:
Absolutely atrocious quality from Hubble. The minimum they should give is 100

I think the max is saw was 130.

How can there be so much variance in a single model
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I probably got everyon'es Ah.

Batteries.PNG


My Nr4 had a consistant 10% less than the others earlier this week (I initially suspected number 3) - but - after letting them sit at 100% for ages it sorted itself out.
 
I just noticed that the cloudlink now gives you the amount of cycles.
My batteries seem fine after the one had a cell replacement and both got a FW update.
1689499498484.png
 
semaphore said:
So this naaier battery had to go in for repairs, firmware update was a faux fix. After 6 days it started dropping in health again to 47%.

So in the jungle I must wait until the dice reads five or eight.
Click to expand...
Sorry to hear. Mine did the same.
Fsckin had to get my installer to take it off the wall, took it in myself.
He didn't charge me though.
 
W@P said:
Sorry to hear. Mine did the same.
Fsckin had to get my installer to take it off the wall, took it in myself.
He didn't charge me though.
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Yeah got it back already surprised it was only with them for a week and a bit.
 
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