Nexcell Lithium cells failure code p3000

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Bryant Totanes, Nov 22, 2025.

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  1. Bryant Totanes

    Bryant Totanes New Member

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    I had bought the lithium prius pack from Nexpower(formally known a Nexcell) back in 2023 and now the pack has given me the code p3000. I had researched why the code came up and it was due to block 8 in my pack failing due to cold temperatures below 30f. The Nexpower website even admits to the failure of the lithium cells which is why they switched to Sodium. I merely wanted to find a way to get a replacement block but since the website no longer deals with lithium cells there is no way for me to buy a replacement block. Is anyone selling individual blocks? I tried to email the nexpower company but their only response was for me to buy their sodium pack for 1k which I cannot afford. If anyone has a spare lithium block I can purchase or if anyone knows a way I can somehow repair the block please let me know thank you.
     
    #1 Bryant Totanes, Nov 22, 2025
  2. bisco

    bisco cookie crumbler

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    browse the other failure threads. maybe someone who upgraded has the old battery
     
    #2 bisco, Nov 22, 2025
  3. Hayslayer

    Hayslayer Active Member

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    I'm sure one of the guys here who pushed these as the greatest thing since sliced bread will be right along to help you out. Maybe even offer to send you a free one.

    How-a-bout it @AzusaPrius and @PriusCamper ? Have some laying around to help this guy out?
     
    #3 Hayslayer, Nov 22, 2025
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  4. Brian1954

    Brian1954 Senior Member

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    Used NexPower (Nexcell) Lithium battery modules are available for sale on eBay. That will be the short-term fix until another module goes bad. Eventually, you will need to replace the complete lithium battery pack because the lithium modules will continue to go bad. It does not make any sense to continue putting money into the lithium battery pack.
     
    #4 Brian1954, Nov 22, 2025
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  5. Bryant Totanes

    Bryant Totanes New Member

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    There was one seller who was selling it, i bought it but the guy hasnt even shipped it nor has he replied to me asking him about it so I basically got scammed. Waiting for ebay to refund me
     
    #5 Bryant Totanes, Nov 22, 2025
  6. Bryant Totanes

    Bryant Totanes New Member

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    Yea i was readinf through the lithium forums and it seems like the cold temperature really messes up the cells. Its crazy because I literally went to Jack’s office and he helped install the pack and he seemed like a nice guy, made me feel confident that the pack would last a long time but that wasnt the case.

    Even if i go to a place with a warmer climate? I thought the main reason for the failure was because of the the temperature. I used to live in california and I had just recently moved to Virginia and Virginia has colder winter which is what I assumed had caused the failure. I wanted to replace the failed block and move back to California and im hoping the warmer climate will prevent the pack from further failure.
     
    #6 Bryant Totanes, Nov 22, 2025
    Last edited by a moderator: Nov 23, 2025 at 3:21 PM
  7. Brian1954

    Brian1954 Senior Member

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    Virginia is not very cold climate.

    The Prius BMS was designed for a NiMH battery. It was not designed for a lithium battery. No matter what climate you live in, a lithium battery installed into a prius will eventually go bad without a properly designed BMS.
     
    #7 Brian1954, Nov 23, 2025 at 4:31 PM
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  8. Bryant Totanes

    Bryant Totanes New Member

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    So i was bamboozeled by that company?
     
    #8 Bryant Totanes, Nov 23, 2025 at 4:33 PM
  9. Brian1954

    Brian1954 Senior Member

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    Correct, you and a lot of other people. That is the reason you see used Nexcell lithium battery modules listed on eBay for sale. NexPower did not have the resources ($$$) to honor the lithium battery warranty and still stay in business. So, they only provided a partial warranty towards the price of the new v3 sodium-ion battery.

    There is currently a project being done to design a proper BMS to be able to use lithium-Ion batteries in a Prius. If you are interested, take a look at this thread, https://priuschat.com/index.php?posts/3456457
    I believe that your existing Nexcell lithium battery will not work with this new BMS, but I could be wrong.
     
    #9 Brian1954, Nov 23, 2025 at 4:47 PM
    Last edited: Nov 23, 2025 at 5:03 PM
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  10. fuzzy1

    fuzzy1 Senior Member

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    The controversies you may seen on others forums are present here on PriusChat too. Jack and supporters and detractors and competitors are members here. So learn the names and figure out what side each is on, before spending any money.
     
    #10 fuzzy1, Nov 23, 2025 at 5:04 PM
  11. Brian1954

    Brian1954 Senior Member

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    There are many different sellers on eBay, not just one. Adjust your search text to find more.

    Edit, I checked three or four weeks ago, and there were many sellers on eBay. I just checked a few minutes ago, and you are right, I only found one seller for the individual Nexcell lithium battery modules. Sorry for the wrong information.
     
    #11 Brian1954, Nov 23, 2025 at 5:28 PM
    Last edited: Nov 23, 2025 at 8:45 PM
  12. Bryant Totanes

    Bryant Totanes New Member

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    Yea that one seller is not even legit so im basically screwed
     
    #12 Bryant Totanes, Nov 23, 2025 at 9:26 PM
  13. Lesk_The_Glut

    Lesk_The_Glut Junior Member

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    I live in southern California, and my nexcell lithium battery has now failed 16 months after install. I was going to try the sodium pack as I'm in dire need of a running car. I'm on the waiting list, but out of desperation I asked Jack for an ETA 2 weeks ago. Crickets.
     
    #13 Lesk_The_Glut, Nov 25, 2025 at 2:03 AM
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  14. Brian1954

    Brian1954 Senior Member

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    That shots the theory that cold temperatures is the cause of the problems with the NexPower lithium batteries.

    It is not a very good sign that Jack has not gotten back to you in 2 weeks' time.
     
    #14 Brian1954, Nov 25, 2025 at 9:41 AM
    Last edited: Nov 25, 2025 at 12:55 PM
  15. mudder

    mudder Active Member

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    I was/am certainly not a Team Jack zealot, but I'm willing to help OP out. @Bryant Totanes, send me a PM and I'll send you QTY2 blades for whatever the actual shipping cost is (proper shipping in CONUS is typically ~$30 HAZMAT limited quantity)... I've got maybe a dozen brand new in box NexPower v2.x blades left.

    As mentioned previously, this isn't a fix, but rather it's a band aid until you can afford to replace your pack with something else (e.g. OEM NiMH, or my upcoming LiBSU product if you're still feeling adventurous (see below)).

    LiBSU hardware is compatible with NexPower LFP and/or sodium cells. However, I'm not going to spend any effort writing firmware for those cells. My focus is on using LiBSU with a properly designed traction battery.

    I do plan to wire a sodium NexPower pack up to my LiBSU harness so I can show everyone how terrible that cell performs under heavy assist/regen, hot/cold, etc. However, I won't productize that hardware setup... it'll just be show and tell in a future video I post.

    Cold temperatures are one of MANY reasons the NexPower packs fail. The primary reason is there's no supervisory control to tell you when a cell has failed... or to keep the cells balanced, which causes them to over/under charge, which causes them to rapidly deteriorate. Adding temperature back into the mix, the lack of supervisory control allows the OEM system to charge the battery even when it's below freezing (yikes).
     
    #15 mudder, Nov 29, 2025 at 7:07 PM
    Last edited: Nov 29, 2025 at 7:12 PM
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