Hubble Batteries

paulbloggs said:
After reading this complete thread I am still undecided!
I have to replace my 13 year old lead acids.
I decided on Hubble based on supplier recommendations and also after a few emails between Hubble technical support and myself.

But I am undecided on whether to go for an AM-5 or an AM-2?
The AM-2 is cheaper and has slightly more capacity. The AM-5 has a better chemistry and unlimited cycles.

And is the cloudlink worth the money?
Click to expand...
Cloudlink - No, rather invest in Solar Assistant.
 
3rd for Am5 :thumbsup:
Just over 18 months and my AM5 has been flawless. Everytime i think it has an issue, its not the battery or inverter.
 
paulbloggs said:
After reading this complete thread I am still undecided!
I have to replace my 13 year old lead acids.
I decided on Hubble based on supplier recommendations and also after a few emails between Hubble technical support and myself.

But I am undecided on whether to go for an AM-5 or an AM-2?
The AM-2 is cheaper and has slightly more capacity. The AM-5 has a better chemistry and unlimited cycles.

And is the cloudlink worth the money?
Click to expand...
What are you connecting it to & for what purpose ?
 
my 4 x am2 are over a 1000 days had one swopped out but would go for new ones now if I had a choice

also had that one swopped out within a 1-2 weeks story is above ZERO issues 100% happy chappy!
 
Last edited:
e9c76d9af8cddc2cb68d2efdd76c74e8.jpg
 
Lukcydog said:
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.
Click to expand...

So my AM5 has lost SOC from 30ish% to 0% 3 times so far.
Once when the City's supply to the Inverter died.
The other 2 times were when I did not allow the battery to charge to 100% within 3 days.
End of June/Beginning of July, we had horrid weather over a week, and I let the battery slowly charge from about 23% via solar over 2 days. It hit max 74% so I thought thats fine, I will let it discharge that evening to the set 23% SOD, then cut off.
It discharged from 74% to 23% over 4.5hours (no major draw). the next morning though, it just dropped from 23% to 0% SOC.

This happened again Tuesday and yesterday.
Tuesday the Battery charged to 61% and I let it discharge from about midnight. By 4am it reached 27%, then suddenly dropped to 0%.
I charged it back up yesterday using some solar and some Grid power, but it only went to 90%. Discharged last night back to 23% and charged this morning to 94%. Im guessing it will eventually hit 100% SOC by tomorrow or Saturday.

Although Hubble recommends that these batteries be charged to 100% at least once a week to enable Balancing, it seems that if they are not charged fully before being discharged again, their voltage drops below the threshold and they cut off.
So going forward, I will rather wait till there's enough solar to fully charge it, or, if more than 3 days and not fully charged, I will charge it from grid.
 
Bunta said:
So my AM5 has lost SOC from 30ish% to 0% 3 times so far.
Once when the City's supply to the Inverter died.
The other 2 times were when I did not allow the battery to charge to 100% within 3 days.
End of June/Beginning of July, we had horrid weather over a week, and I let the battery slowly charge from about 23% via solar over 2 days. It hit max 74% so I thought thats fine, I will let it discharge that evening to the set 23% SOD, then cut off.
It discharged from 74% to 23% over 4.5hours (no major draw). the next morning though, it just dropped from 23% to 0% SOC.

This happened again Tuesday and yesterday.
Tuesday the Battery charged to 61% and I let it discharge from about midnight. By 4am it reached 27%, then suddenly dropped to 0%.
I charged it back up yesterday using some solar and some Grid power, but it only went to 90%. Discharged last night back to 23% and charged this morning to 94%. Im guessing it will eventually hit 100% SOC by tomorrow or Saturday.

Although Hubble recommends that these batteries be charged to 100% at least once a week to enable Balancing, it seems that if they are not charged fully before being discharged again, their voltage drops below the threshold and they cut off.
So going forward, I will rather wait till there's enough solar to fully charge it, or, if more than 3 days and not fully charged, I will charge it from grid.
Click to expand...
I think the SOC is a guess-o-meter with LFP, and needs to be recalibrated with a 100% charge. Try draining past 23% after its had a full charge to 100. If it still jumps to 0% suddenly then there might be a bad cell or something imho and you're not getting full capacity and need to do the warranty thing.
 
Bunta said:
So my AM5 has lost SOC from 30ish% to 0% 3 times so far.
Once when the City's supply to the Inverter died.
The other 2 times were when I did not allow the battery to charge to 100% within 3 days.
End of June/Beginning of July, we had horrid weather over a week, and I let the battery slowly charge from about 23% via solar over 2 days. It hit max 74% so I thought thats fine, I will let it discharge that evening to the set 23% SOD, then cut off.
It discharged from 74% to 23% over 4.5hours (no major draw). the next morning though, it just dropped from 23% to 0% SOC.

This happened again Tuesday and yesterday.
Tuesday the Battery charged to 61% and I let it discharge from about midnight. By 4am it reached 27%, then suddenly dropped to 0%.
I charged it back up yesterday using some solar and some Grid power, but it only went to 90%. Discharged last night back to 23% and charged this morning to 94%. Im guessing it will eventually hit 100% SOC by tomorrow or Saturday.

Although Hubble recommends that these batteries be charged to 100% at least once a week to enable Balancing, it seems that if they are not charged fully before being discharged again, their voltage drops below the threshold and they cut off.
So going forward, I will rather wait till there's enough solar to fully charge it, or, if more than 3 days and not fully charged, I will charge it from grid.
Click to expand...

My inverter is set to discharge to 40% before switching the house to Eskom , if it’s below 40 at night, then it will charge the batteries from grid, that said, it seldom does that
 
wingnut771 said:
I think the SOC is a guess-o-meter with LFP, and needs to be recalibrated with a 100% charge. Try draining past 23% after its had a full charge to 100. If it still jumps to 0% suddenly then there might be a bad cell or something imho and you're not getting full capacity and need to do the warranty thing.
Click to expand...
Will give this a try after getting to 100% (hopefully by Saturday or Sunday).
It's charged to 95% and 55Vdc now, not going above that.
Will let it discharged tonight to 23% again then recharge tomorrow, i'm hopeful / sure it will get to 100% again
BouncyNinja said:
My inverter is set to discharge to 40% before switching the house to Eskom , if it’s below 40 at night, then it will charge the batteries from grid, that said, it seldom does that
Click to expand...
Do you have it at 40% to keep some capacity in case there's load shedding?
 
Bunta said:
Will give this a try after getting to 100% (hopefully by Saturday or Sunday).


Do you have it at 40% to keep some capacity in case there's load shedding?
Click to expand...

I honestly can’t tell you why 🤣 , it has the installer set it up, haven’t had a days crap with it

Only thing I changed was the night time charging
 
Bunta said:
Will give this a try after getting to 100% (hopefully by Saturday or Sunday).
It's charged to 95% and 55Vdc now, not going above that.
Will let it discharged tonight to 23% again then recharge tomorrow, i'm hopeful / sure it will get to 100% again

Do you have it at 40% to keep some capacity in case there's load shedding?
Click to expand...
What is it set to? 57.6V?
 
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