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  1. 2Big2B

    Overkill BMS defaults?

    Question: How reliable are the Overkill BMS pre programmed parameters? I just finished building my 8s 24v 100ah battery pack using the Overkill BMS for it. It appears to be working great. A Bluetooth module was included, but I don't use a smart phone or anything that I can run its program. I...
  2. 2Big2B

    Cardboard Busbars !!!

    In the process of cutting my own heavy copper busbars customized for a 8S 24v 100ah build I came up with a template for drilling and cutting them from flat bar copper. The real moment of truth is when you are about to install the bus bars in series after the parallel top balancing. This is when...
  3. 2Big2B

    Passive Top Balancing ? How/Why does it work ?

    My question is about Top Balancing logic. If I simply take a set of LiFePo4 batteries, line them up and connect them in parallel for top balancing without connecting the plus and minus poles to a my variable 20v/10A bench power supply, will they equalize and balance all by themselves, or does...
  4. 2Big2B

    Overkill BMS question about over current load

    I am building an 8S 24v 100AH battery pack with an Overkill 8S 24v 100AH BMS for a "Bounder" model power wheelchair. The pack will replace a pair of 100AH 12v Gel cells in series. The power wheelchair uses two massive 30A (?) electric motors. I just found a mention in the wheelchair's service...
  5. 2Big2B

    A MUST SEE YouTube: "Off The Grid: Installing the Best New Lithium Batteries!"

    I am not affiliated with the author. I am new. Maybe this is old news. I just stumbled across this on YouTube which should probably be of interest to many of us here. This is a wonderfully instructional video about a serious off grid DYI Solar Power installation on a farm. I learned stuff...
  6. 2Big2B

    Does anyone know what a - "Model J10A-GA28" - DALY LiFepo4 8S 24v 100A BMS is ???

    I purchased a Daly BMS LiFepo4 8S 24v 100A Model J10A-GA28 on ebay that arrived yesterday. I purchased it based on its following description: Condition: New: A brand-new, unused, unopened, undamaged item in its original packaging Brand: DALY Country/Region of Manufacture: China...
  7. 2Big2B

    POWER WHEELCHAIR application

    Hi. My project is to build a custom LiFeP04 8S 25.6v 100AH pack to replace the two SLA Group 27 75AH batteries in my 21st Century "Big Bounder" power wheelchair that I won at auction - batteries not included. It surprises me that there is very little in the public domain on doing that. My buddy...
  8. 2Big2B

    Sourcing Parts

    I am building a 8S 12v/100AH pack for a power wheelchair. I will use a DALY LiFePo4 8S 24V 100A BMS (common port - whatever that means) with it, connected with some kind of fuse protection, preferably a breaker switch. I have been following "DIY Solar Power with Will Prowse" YouTube videos...
  9. 2Big2B

    DYI Parts and connectors

    I am building a 8S 12v/100AH pack for a power wheelchair. I will use a DALY LiFePo4 8S 24V 100A BMS (common port - whatever that means) with it, connected with some kind of fuse protection, preferably a breaker switch. I have been following "DIY Solar Power with Will Prowse" YouTube videos...
  10. 2Big2B

    Where to source connectors and parts

    I am building a 8S 12v/100AH pack for a power wheelchair. I will use a DALY LiFePo4 8S 24V 100A BMS (common port - whatever that means) with it, connected with some kind of fuse protection, preferably a breaker switch. I have been following "DIY Solar Power with Will Prowse" YouTube videos...
  11. 2Big2B

    What charger do I need for my 24v 100ah LiFeP04 pack?

    Hi, I am new here and this is a first post. Hopefully someone can point me in the right direction. I am building my first battery pack. I know my way around a VOM, soldering iron, and typical power supplies and amplifiers . I used to be a very active ham radio operator (callsign N2MZN, Coded...
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