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Pylontech US3000 charging to over 100%

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It was mentioned long time ago somewhere in the forums of someone else having the same situation, but can't get that post. So now my US3000A's are displaying 106% when fully charge. They are nearly 4 years old. What is strange is that it is all 4 of mine and both at my in-laws system. They are still balancing at the 89% and that point has not shifted. As I don't have comms between inverter and batteries, I run it at a charge voltage of 52.5V. I have no issues and they are still performing good Also never had a fault led come on. Anyone else experiencing the same?

Also I see the SOH is 94%. Maybe it has something to do with that?

Edited by JacquesVDM

I have the same problem. I have 5 batteries bought at different dates with each showing its own value above 100%.

1x US3000C @ 100% / 74AH charge (bought 2 weeks ago)
1x US2000B @ 104% / 52AH (bought a year ago)
1x US2000B @ 105% / 52.5AH (bought a year and a half ago)
2x  US2000B @ 109% / 54.5AH (bought 3 and a half years ago)

I do have my float and bulk charge set to 53.2 but I've never gotten an over voltage warning that I am aware of. My older batteries balance at 89% on most days with my US3000C gradually increasing until full. It does seem to get "worse" with age. I wonder if they don't add extra capacity and release it with age or something to counter the normal "wear and tear" of the battery. With ours just performing better than expected and thus the released capacity adding AH to our system. It would be nice to find out if this is indeed the case or if we are somehow messing up our batteries.

Edit: I do limit my max DoD to 20-25% (remaining) on my batteries to make them last longer. I want those 6000 cycles instead of the normal 4500. :) 

Screenshot 2023-02-26 142830.png

Edited by ianjvr
Added DOD statement

On 2023/02/22 at 5:51 PM, JacquesVDM said:

It was mentioned long time ago somewhere in the forums of someone else having the same situation, but can't get that post. So now my US3000A's are displaying 106% when fully charge. They are nearly 4 years old. What is strange is that it is all 4 of mine and both at my in-laws system. They are still balancing at the 89% and that point has not shifted. As I don't have comms between inverter and batteries, I run it at a charge voltage of 52.5V. I have no issues and they are still performing good Also never had a fault led come on. Anyone else experiencing the same?

Also I see the SOH is 94%. Maybe it has something to do with that?

Sticking at 89% for some time is quite normal, they should eventually go up to 100% though. (Edit- this is over 5 days charging is at a constant current).

soc.png

Edited by Tinbum

  • 7 months later...

would you please give me a link to download this BatteryView 3.0.29 SW version, I have the previous 3.0.28 one that I could not make work correctly on my 5 x US5000 battery's 

  • 2 weeks later...

I emailed pylontech support about this. They sent me the latest firmware for my u2000 batteries. After the update they are reporting correctly and no longer show a SOC or remaining AH of higher than 100% or 50AH respectively.  So it appears to be a software only issue.

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