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Tinbum

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  1. I'd put it back to what it was when it showed the error so you can see the error in the new position otherwise they will say the position was the problem!
  2. Version 1.0.0

    9 downloads

    2.9 Firmware for the older chip US3000C. DO NOT USE UNLESS YOU KNOW WHAT YOU ARE DOING. INCORRECT USE WILL BRICK YOUR BATTERY.
  3. See you have now posted new photos. I agree that the cells are badly matched and i do think pylotech should seriously look into it.
  4. Sorry I missed the photo showing 53v but I can't see any at 52.5v with the cells at 3.62v. Your comment "Bellow 3.45V the cells are also balanced with that delta of 0.02V or less. Something happens above certain voltage."
  5. You really need to go back and understand how Li cells work. Re 52.5 or 53.2v no one said anything about the module not raising its voltage. The cells will look balanced below 3.45v. No don't run them at 51.75v or less. Low level heating sounds fine and sensible. As I and other have mentioned it looks like the ambient temp sensor is near the balance circuit, that's why the temp goes up when balancing. I agree regarding the cells not being balanced well when manufactured. I'll ask again what is your charge voltage when the cells go to 3.62v?
  6. (No one has said to charge only from solar). If your batteries are balanced, within 20mv is balanced, then that is not a problem and doing it for more than the time you have been doing it for is not required. But if cells are going up to 3.62 volts before balancing then that does seems high. What was your charge voltage setting at that time?
  7. No I didn't say the same thing. You will see when the BMS is limiting as the inverter will be charging at the actual current that the BMS is requesting. ie If your BMS is saying a limit of 5A then the battery will be charging at 5A. If the battery is only charging at 2A then it is the battery chemistry that is doing the limiting not the BMS. 54v is too high. Yes pylontech are asking you to do the equivalent of an equalization. Do it at something like 52.5v and do it for hours or days until the cells are no longer balancing.
  8. They replaced his battery though so it did look to be hardware related.
  9. This seems wrong. Have Pylontech also changed things in the factory that they don't put balanced cells in their 'new chip' batteries. Do they eventually balance?
  10. Agree, but a new battery shouldn't require days to balance it should come balanced.
  11. No it doesn't work like that. The current is reducing just because the batteries are getting full. As they fill their resistance goes up so the current goes down. The inverter charge current should be controlled by what the BMS is requesting- if not their is something wrong. In practice though,other than when the batteries are very empty, the current is limited by the battery chemistry not the BMS. I've never seen my current reduced because of a BMS setting- but it does depend on how big a battery bank you have. If you only had one of your batteries and not 3 you may see it. When the battery is at 100% SOC then the BMS will request a charge current of 0A so the Victron will respect that. It may be an idea to set that up without communication to do a long charge as Pylontech recommend. I still think your battery should not require cell balancing like this. It's new it should come balanced. Mine all have been fine from new.
  12. I would go back to Pylontech. You've done as they said and it's not resolved. Keeping it floating at a high voltage for hours should have resolved it. None of mine require hours of balancing and as you say the ambient temp rise shows when they are actually balancing. (Bad design but useful)!! Their is something wrong with that battery.
  13. Goes to the inverter. See attached for instructions. Standard LAN cable between banks. I think their is a way without the hub but cant find the instructions. edit-Page 25-27 of UP5000 manual LV hub US3000C.pdf UP5000-V1.0-Product-Manual.pdf
  14. 37A x 2 (DC) is what you will get. No problem adding another battery. Installer messed up.
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