Hubble Batteries

TedLasso said:
Not sure why my hubbles are not balanced in 'charging/discharging'. The newer one always takes the hit

Sandton has a area outage and so it meant we were running on batteries (not even fully charged) since 4PM yesterday. The system finally failed at 6:50AM ..

But look at this now that it is back up.

View attachment 1682041


1st Original Battery
View attachment 1682043
2nd battery - installed a year later
View attachment 1682045

So when the system shutdown finally at 15%, Battery 2 was at 4% but Battery 1 was at 27%. Battery 2 cycles faster than Battery 1

View attachment 1682051

The cables are fine and equal length and go in the loop from inverter to battery 1 to battery 2 to inverter. Voltages are matching each other.

Do I just accept this as normal or do we need it to be checked?
Click to expand...
What happens when you charge to 100%?
 
xrapidx said:
That's a huge differences - I have four, they frequently get out of sync as they get lower, but - max is usually about 12.5% difference.

I actually made a sensor to track it MAX acrosss all batteries less MIN across all batteries.
View attachment 1682187

3 of my batteries arr 131-132aH - and one is 122ah - its usually this one that causes the fluctation - but - not always.
Click to expand...
That is cool. I should try to build one. I do ensure both batteries get to 100% at least every few days for cell balancing to occur.
 
TedLasso said:
All perfect and balanced, etc. It's just that the Hubble 2 is used more.

FWIW, Hubble 1 capacity is 110Ah and the new one is 100Ah
Click to expand...
Ah, ok, then ignore it, it's normal if not the exact same battery, probably slightly different resistance.

What happens when you take it to 0%?
 
TedLasso said:
That is cool. I should try to build one. I do ensure both batteries get to 100% at least every few days for cell balancing to occur.
Click to expand...

Its fairly simple, can probably be done by the UI

Code: 
sensor:
- platform: min_max
  name: Individual Battery Max SOC
  unique_id: individual_battery_max_soc
  type: max 
  entity_ids:
    - sensor.state_of_charge
    - sensor.state_of_charge_2
    - sensor.state_of_charge_3
    - sensor.state_of_charge_4

- platform: min_max
  name: Individual Battery Min SOC
  unique_id: individual_battery_min_soc
  type: min 
  entity_ids:
    - sensor.state_of_charge
    - sensor.state_of_charge_2
    - sensor.state_of_charge_3
    - sensor.state_of_charge_4
 
TedLasso said:
Not sure why my hubbles are not balanced in 'charging/discharging'. The newer one always takes the hit

Sandton has a area outage and so it meant we were running on batteries (not even fully charged) since 4PM yesterday. The system finally failed at 6:50AM ..

But look at this now that it is back up.

View attachment 1682041


1st Original Battery
View attachment 1682043
2nd battery - installed a year later
View attachment 1682045

So when the system shutdown finally at 15%, Battery 2 was at 4% but Battery 1 was at 27%. Battery 2 cycles faster than Battery 1

View attachment 1682051

The cables are fine and equal length and go in the loop from inverter to battery 1 to battery 2 to inverter. Voltages are matching each other.

Do I just accept this as normal or do we need it to be checked?
Click to expand...
Looks more like SOC creep if the voltages are matching. Hows the cell voltages at full resting?
 
wingnut771 said:
Ah, ok, then ignore it, it's normal if not the exact same battery, probably slightly different resistance.

What happens when you take it to 0%?
Click to expand...
Have not tried. Inverter shuts down at 15% .. but happy to try the next time Eskom has an extended outage :)

Its fairly simple, can probably be done by the UI
xrapidx said:
Code: 
sensor:
- platform: min_max
  name: Individual Battery Max SOC
  unique_id: individual_battery_max_soc
  type: max
  entity_ids:
    - sensor.state_of_charge
    - sensor.state_of_charge_2
    - sensor.state_of_charge_3
    - sensor.state_of_charge_4

- platform: min_max
  name: Individual Battery Min SOC
  unique_id: individual_battery_min_soc
  type: min
  entity_ids:
    - sensor.state_of_charge
    - sensor.state_of_charge_2
    - sensor.state_of_charge_3
    - sensor.state_of_charge_4
Click to expand...
Cheers! I setup the helpers via UI and now thrown onto a plotly graph. Let's see what it looks like in the next few days

Here's one from Apex Charts for the last 10 days (with voltage)
1711549413803.png
PsyWulf said:
Looks more like SOC creep if the voltages are matching. Hows the cell voltages at full resting?
Click to expand...
Cell voltages are around 53.8v-54v when batteries are full and floating. Just realised we didn't get to 100% for about 6 days now. Will be manually charging from Grid tonight now that eskom power is back.
 
TedLasso said:
[COLOR=var(--text-light)]Just realised we didn't get to 100% for about 6 days now. Will be manually charging from Grid tonight now that eskom power is back.[/COLOR]
Click to expand...
That's probably a big contributor,I run voltage mode rather than BMS because of the habitual SoC creep
 
Maybe I should try this for a week? Can you share what to do on the inverter?

I was going to try to find the settings to show you what they are currently, and now also saw this

Pic 1
Don't know when this happened, but now both batteries are being reported as 100Ah ... Hubble AM2 s have never had a firmware update since purchase.

1711592580166.png

Pic2

1711592622607.png
Charging stats - while I know I can charge and discharge these batteries at 200Amp I choose to err on the side of caution hence i reduced it about 1 year ago.


We have never had an inverter issue or load issue as we don't drive high loads normally
 
TedLasso said:
Maybe I should try this for a week? Can you share what to do on the inverter?

I was going to try to find the settings to show you what they are currently, and now also saw this

Pic 1
Don't know when this happened, but now both batteries are being reported as 100Ah ... Hubble AM2 s have never had a firmware update since purchase.

View attachment 1682573

Pic2

View attachment 1682575
Charging stats - while I know I can charge and discharge these batteries at 200Amp I choose to err on the side of caution hence i reduced it about 1 year ago.


We have never had an inverter issue or load issue as we don't drive high loads normally
Click to expand...
Oh Also noticed now your Voltages are set to 53.6 - Hubble recommends 53.8 currently
 
The 53.6 was sét by the installer who was very highly recommended on powerforum. Have now set to 53.8v

Ironically, since my last post, today we have been without grid power since 1am. Batteries charged to 100% and discharging since solar stopped .

The graph of battery SoC difference is crazy. Never managed to flatten battery , but it may happen tonight. Set shutdown to 2%.



Screenshot_20240515_225411_Home%20Assistant.jpg
 
PsyWulf said:
Oh Also noticed now your Voltages are set to 53.6 - Hubble recommends 53.8 currently
Click to expand...

Mine is set as follows by the installer :/

Battery float charge voltage
55.2 V
Battery absorption charge voltage
57.6 V
Battery equalization charge voltage
57.6 V
 
TedLasso said:
The 53.6 was sét by the installer who was very highly recommended on powerforum. Have now set to 53.8v

Ironically, since my last post, today we have been without grid power since 1am. Batteries charged to 100% and discharging since solar stopped .

The graph of battery SoC difference is crazy. Never managed to flatten battery , but it may happen tonight. Set shutdown to 2%.



View attachment 1709861
Click to expand...
Meh,SOC estimates can be...iffy

1715841216077.png
 
TedLasso said:
The 53.6 was sét by the installer who was very highly recommended on powerforum. Have now set to 53.8v

Ironically, since my last post, today we have been without grid power since 1am. Batteries charged to 100% and discharging since solar stopped .

The graph of battery SoC difference is crazy. Never managed to flatten battery , but it may happen tonight. Set shutdown to 2%.



View attachment 1709861
Click to expand...
Still keen to see what happens at 0%.
 
xrapidx said:
Yip - x4 - are the values actually used though? Doesn't the battery BMS take care of it?
Click to expand...
55-58v? That's AM5 voltages chief

  • Model: Hubble AM-5
  • Rated Capacity (5HR): 100 Ah.
  • Nominal Voltage: 51.2 V
  • Discharge Cutoff Voltage: 5.12 KWH
  • Equalized Charge Voltage: 55.2 V
 
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