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Jay-Dee

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  1. Like
    Jay-Dee got a reaction from LionKing in Narada Li-Iron Float Voltage?   
    https://portal.segensolar.co.za/reseller/docs/Application note for upgrading UP5000 to 0.9C battery (1).pdf
     
    How to and links included
  2. Like
    Jay-Dee got a reaction from LionKing in Narada Li-Iron Float Voltage?   
    So, I got my comms working between the Sunsynk and the Narada batteries (I have / had 2) but the issue came in with when I put my setup in "load shedding mode" i.e. only used the batteries in load shedding, the SOC being reported by the BMS was very wonky. The batteries would remote 100% SOC at 49v and obviously then deplete quickly.  This was caused when the batteries were floated for a week or more without any load shedding.     This issue does not happen when running an Axpert Inverter with ICM or Solar Assistant controlling the system via the BMS, so I know it is a combined Sunsynk and Narada issue.

    I then moved my batteries to AGM mode on the Sunsynk, controlled the batteries via voltage and completely ignored the SOC of the BMS... This worked perfectly. I then connected the BMS to ICM and compared the SOC readings in there to the voltages to fine tweak the settings on the Sunsynk.  I did not have a problem at all with this setup and ran perfectly for about a year.

    I am not upgrading my setup and did not want invest more into Naradas when it was a make do / work around... Having had Hubbles at another site working almost perfectly, I know how much easier things are when you able to communicate properly and considering the Naradas are not cheaper... I moved things around and am enjoying my Pylontechs.   The other big advantage of the Pylontechs is being able to mix and match battery sizes as this has allowed me to purchase lightly used units at great prices.

    As mentioned originally... If you are purchasing and not re-purposing... I would go Pylontech as the Naradas are not cheaper / much cheaper
  3. Like
    Jay-Dee reacted to PowerUser in 3x 5KW or 2x 8KW inverters   
    If you do a search around there is a thread which explains AUX operation in detail.
  4. Like
    Jay-Dee reacted to PowerUser in 3x 5KW or 2x 8KW inverters   
    Incorrect. AUX is part of the essential load and it is works during load shedding. 
  5. Like
    Jay-Dee got a reaction from hoohloc in Pylontech balancing - Best Practice?   
    Did not think of that option... Thank you
  6. Like
    Jay-Dee got a reaction from zsde in Hubble Blade - How is it 10kw?   
    I realised this after Jason's comment above...   Their marketing has always been sneaky / on the boarder of dishonest but this just pushes it to the next level in my mind

    While discharge rate is important and needs to be taking into account, I can assure you that most people will at first glance of the PDF think it is a 10kWh battery and then only realise afterwards.

    Dont get me wrong, I am still going to purchase AM2s and I still like their products (and have a number already) but I think they are a little too sneaky on their marketing with this one
  7. Like
    Jay-Dee got a reaction from DeonBez in Implications of Lithium Battery via voltage instead of BMS   
    I have been following your thread on the BMS replacement... I am presuming you did this as your BMS was wonky like mine has become.

    I have been running this on voltage control with the Sunsynk... For the first 2 days, I ran it on AGM V and have now been running on AGM % for the last week and a bit. I am very comfortable with the voltage specs used as specified in the Narada spec sheet at 54.5v float and 54.0 charge... This seems to be working perfectly for me and I am getting perfect performance with dropping my batteries down to a daily 25% SOC based on the Sunsynks shunt measuring as this is keeping the voltage in the 48's and only dropping down under very large load at low SOC... At 25%, I am getting the expected 150Ah from my 2 batteries.

    For me, this is where I am going to leave it, so long as I dont have any issues down the line. I am using ICM to monitor the cells and keep an eye out for any other issues but so far so good 
  8. Like
    Jay-Dee reacted to zivva in Deye + Narada BMS comms   
    Update ...
    Don't waste your time with proper com between Deye / SunSynk and Narada : the Shinwa BMS seems to be kind of totally unreliable when reporting battery SOC.
    You can still monitor battery health with the BMS software but using voltage is much more reliable than using a broken SOC ...
     
  9. Like
    Jay-Dee got a reaction from system32 in Data Loggers - Wifi-Plug-Pro-5   
    https://powerforum-store.co.za/products/sunsynk-wifi-data-logger
    Available on its own from a few places
  10. Thanks
    Jay-Dee got a reaction from Nelian55 in Data Loggers - Wifi-Plug-Pro-5   
    https://powerforum-store.co.za/products/sunsynk-wifi-data-logger
    Available on its own from a few places
  11. Like
    Jay-Dee reacted to WannabeSolarSparky in Implications of Lithium Battery via voltage instead of BMS   
    Yes with the older battery the BMS was a total bust/malfunctioning, it just was not doing what it's supposed to do I think it was from an old batch with the bad bms series.
    The new battery works great for almost a year now and stays nicely balanced.
     
    As for the JK BMS, I do not understand why the battery builders are not using the same SMART tech in their BMS's
    I am so impressed with this JK BMS that I am considering voiding the warranty on the second good battery as well and putting in a JKBMS there too
    I will NEVER buy a pre-built battery again unless/until they start using decent smart BMS's that I have full access to.

    Last night was the 1st NORMAL cycle since replacing the faulty cell and running the JK BMS

  12. Like
    Jay-Dee got a reaction from Antonio de Sa in Implications of Lithium Battery via voltage instead of BMS   
    I have been following your thread on the BMS replacement... I am presuming you did this as your BMS was wonky like mine has become.

    I have been running this on voltage control with the Sunsynk... For the first 2 days, I ran it on AGM V and have now been running on AGM % for the last week and a bit. I am very comfortable with the voltage specs used as specified in the Narada spec sheet at 54.5v float and 54.0 charge... This seems to be working perfectly for me and I am getting perfect performance with dropping my batteries down to a daily 25% SOC based on the Sunsynks shunt measuring as this is keeping the voltage in the 48's and only dropping down under very large load at low SOC... At 25%, I am getting the expected 150Ah from my 2 batteries.

    For me, this is where I am going to leave it, so long as I dont have any issues down the line. I am using ICM to monitor the cells and keep an eye out for any other issues but so far so good 
  13. Like
    Jay-Dee got a reaction from WannabeSolarSparky in Implications of Lithium Battery via voltage instead of BMS   
    Any insight to what the negative effect of controlling my lithium batteries via voltage instead of BMS comms?

    I have a Sunsynk inverter and 2x Narada 48NPFC100 batteries. The batteries keep on falling out of sync with the SOC reported by the BMS.  If I have a few days of bad PV generation where the batteries are not charged to 100%, the batteries report 100% SOC when they are far from it (especially when comparing to the actual voltage).  This also happens when the batteries are kept at 100% SOC for a few days.

    I am thinking it may be beneficial to let the inverter control the batteries via voltage instead for letting it communicate with the BMS but I was wondering what the negative effects would be (short or long term).
    I will still be able to read the BMS reported SOC in my monitoring software, allowing me to be able to keep an extra eye on it

    Thanks in advance
  14. Like
    Jay-Dee got a reaction from WannabeSolarSparky in Implications of Lithium Battery via voltage instead of BMS   
    Nope, constant 1C on the 48NPC100 model... The smaller ones are less but this was one of the specific reasons I chose this battery initially.  Not that it is an issue any more as I cap it at 135A over the 2 batteries as more is not needed with a 5KW system 
  15. Like
    Jay-Dee got a reaction from WannabeSolarSparky in Implications of Lithium Battery via voltage instead of BMS   
    100% and totally on the same page... 

    My batteries are 4 years old already... The first 3.5 years were controlled via voltage and the SOH when reading the BMS is sitting at 96%. I dont know why I did not think about this before posting the topic as it answer my question 🤣

    I use my for both load shedding and savings over night / charge during the day but very rarely go below 30% DOD when they are working as they are supposed to.

    The above SOH has answered it for me... I am staying on voltage control for now... Perhaps Narada will answer their emails and send me a firmware update one day
  16. Like
    Jay-Dee got a reaction from zsde in Implications of Lithium Battery via voltage instead of BMS   
    Nope, constant 1C on the 48NPC100 model... The smaller ones are less but this was one of the specific reasons I chose this battery initially.  Not that it is an issue any more as I cap it at 135A over the 2 batteries as more is not needed with a 5KW system 
  17. Haha
    Jay-Dee reacted to jumper in Implications of Lithium Battery via voltage instead of BMS   
    LOL at first glance I thought you had the most perfectly balanced battery in the world 🤣
  18. Like
    Jay-Dee got a reaction from Antonio de Sa in Implications of Lithium Battery via voltage instead of BMS   
    To me, I considered the below well balanced.. Am I right or wrong?

    This is controlled via voltage to the battery and then obviously the internal BMS from there. Unfortunately, I could not see this info when it was controlled via BMS directly

  19. Like
    Jay-Dee reacted to CyberJoe in ICC VS Solar Assistant   
    A very important thing to take note off:
    With Solar Assistant your data lives on your own device on the card. You have no way of accessing that data in any form other than through Solar Assistant. (It is time for somebody with a bit of Linux skill to look at the SA installation and figure out how to remove the monitor off, no keyboard instruction, add back SSH access to enable backups over the network). 
    Solar Assistant DOES NOT BACKUP YOUR DATA.  If anything happens like a corrupt card your data is gone forever, the recovery method from Solar Assistant is to install it onto a fresh card and start over. 
    There IS NO WAY TO BACKUP YOUR data, other than pulling the card out every now and again and making a file image manually of it. 
    In comparison with ICC you have FULL access to the system running ICC and can easily do your own backups, or move your data from one installation to a new one. 
     
  20. Like
    Jay-Dee reacted to Sc00bs in Implications of Lithium Battery via voltage instead of BMS   
    @Antonio de SaMy understanding is that it is also important to fully charge the batteries so as to ensure that the cells can be balanced by the BMS as the voltage differences in the middle of the SOC range are so small that they are almost impossible for the BMS to balance the cells. So if you only use your battery between 20 & 80% SOC for example, individual cells are more likely to get out of balance (depending on the BMS I would assume)
    I think that the thing to remember is that not all battery BMS's are created equally.
    The more expensive BMS's generally have better cell balancing and often use a shunt to determine the SOC rather than using individual cell voltages
  21. Like
    Jay-Dee got a reaction from zsde in Implications of Lithium Battery via voltage instead of BMS   
    This is 100% correct and is very definatately taken into account. Narada has a reasonable amount of information on this
     
    Float = 54.0v
    Charge current = 54.0 to 54.5v
    LLVD (low voltage non essential load disconnect) = 47v
    BLVD (low voltage battery disconnect) = 43.2v
    Full battery discharge (0% SOC) = 40.5v

    Implementing the above settings is not an issue nor is maintaining them. My question was raised that if I stick to these parameters, is there any long term negative effect.

    Currently in bad weather the batteries BMS is letting it go down into the very low 40s (sub 42v) as it things the SOC is still fine which is obviously a major concern for me. In good weather, the BMS things the battery is depleted at 49v... So my mind says it is safer to run on voltage than rely on the BMS and SOC.  

    Also without a firmware update or the likes of from Narada, the batteries are not very useful when using the comms as I am lucky to get around 40Ah out of the 200
  22. Like
    Jay-Dee got a reaction from zsde in Implications of Lithium Battery via voltage instead of BMS   
    100% and totally on the same page... 

    My batteries are 4 years old already... The first 3.5 years were controlled via voltage and the SOH when reading the BMS is sitting at 96%. I dont know why I did not think about this before posting the topic as it answer my question 🤣

    I use my for both load shedding and savings over night / charge during the day but very rarely go below 30% DOD when they are working as they are supposed to.

    The above SOH has answered it for me... I am staying on voltage control for now... Perhaps Narada will answer their emails and send me a firmware update one day
  23. Like
    Jay-Dee got a reaction from Psy in Implications of Lithium Battery via voltage instead of BMS   
    100% and totally on the same page... 

    My batteries are 4 years old already... The first 3.5 years were controlled via voltage and the SOH when reading the BMS is sitting at 96%. I dont know why I did not think about this before posting the topic as it answer my question 🤣

    I use my for both load shedding and savings over night / charge during the day but very rarely go below 30% DOD when they are working as they are supposed to.

    The above SOH has answered it for me... I am staying on voltage control for now... Perhaps Narada will answer their emails and send me a firmware update one day
  24. Like
    Jay-Dee got a reaction from Psy in Implications of Lithium Battery via voltage instead of BMS   
    This is 100% correct and is very definatately taken into account. Narada has a reasonable amount of information on this
     
    Float = 54.0v
    Charge current = 54.0 to 54.5v
    LLVD (low voltage non essential load disconnect) = 47v
    BLVD (low voltage battery disconnect) = 43.2v
    Full battery discharge (0% SOC) = 40.5v

    Implementing the above settings is not an issue nor is maintaining them. My question was raised that if I stick to these parameters, is there any long term negative effect.

    Currently in bad weather the batteries BMS is letting it go down into the very low 40s (sub 42v) as it things the SOC is still fine which is obviously a major concern for me. In good weather, the BMS things the battery is depleted at 49v... So my mind says it is safer to run on voltage than rely on the BMS and SOC.  

    Also without a firmware update or the likes of from Narada, the batteries are not very useful when using the comms as I am lucky to get around 40Ah out of the 200
  25. Like
    Jay-Dee got a reaction from Antonio de Sa in Implications of Lithium Battery via voltage instead of BMS   
    100% and totally on the same page... 

    My batteries are 4 years old already... The first 3.5 years were controlled via voltage and the SOH when reading the BMS is sitting at 96%. I dont know why I did not think about this before posting the topic as it answer my question 🤣

    I use my for both load shedding and savings over night / charge during the day but very rarely go below 30% DOD when they are working as they are supposed to.

    The above SOH has answered it for me... I am staying on voltage control for now... Perhaps Narada will answer their emails and send me a firmware update one day
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