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  1. P

    building my first battery

    I will check your links when I have some time. I have been looking with Google, so not just Amazon or Ebay. Problem I have found with some sites is they don't give all the specs such as over voltage cutoff or low voltage cutoff. And I know I can go with a larger current BMS, but what I was...
  2. P

    building my first battery

    Thank you for your help. Still having a hard time finding a BMS that is 20 amps 4S. So if you happen to stumble on any, post a link. It seems like most of them are for bikes and RVs with higher voltage requirements. At least with some help from you folks, I think I can cobble something...
  3. P

    building my first battery

    Max charge current and max load current 20A. I have never seen a spec for acpicity. I may be new to building batteries but I am no stranger to electrical or electronic work. If the SC says it can handle it, I would assume all of the SC components, including the terminal connectors can as...
  4. P

    building my first battery

    I'm using 10 gage wire and round trip runs of about a foot or less.
  5. P

    building my first battery

    What is ampacity? current capacity? My pack will be 30 AH As for the brands, lol my bad, I thought chargery, I thougth that was a misspeling, joey was another user in the group and reco was short for recomend. lol Thank you for clearing that up. My investment is not huge and I want to keep...
  6. P

    building my first battery

    If using a BMS I can charge with my hobby charger at up to 7 amps constant current then switches to CV till current is 1/10 the charge current. I can also bypass the BMS and use an adapter (at least that is how I plan to wire it up) to charge with that same charger using the chargers' balancing.
  7. P

    building my first battery

    My use is pretty low power compared to an electric vehicle. probably 20 amps at most, and more likely closer to 10 at transmit. Also for an adjustable BMS or LVC, a source or brand/model would be helpful Bob
  8. P

    building my first battery

    Thank you. THIS is what I needed most. But I do appreciate all the advise. Unfortunately the BMSs I can find mostly cut off way too low, and I had a hard time finding a voltage cut off at the point I wanted that wasn't way over kill, but I have a charge controller that will do what I want. Bob
  9. P

    building my first battery

    The solar charge controller will cut off charging current if the batter gets to a certain voltage, and cut off the load if the battery voltage gets to low I did try to find a lvc since most of the BMSs I could find had way too low a cutoff voltage, but most seemed to be expensive and for much...
  10. P

    building my first battery

    yes.
  11. P

    building my first battery

    John, where do I find a decent BMS? My max current draw is only going to be 20 or 30 amps at most, and most of the time much lower, 5 or so jumping to 10 - 18 at most when I transmit and THAT is if I use for my big radio. I do also plan to use this for my CPAP when I camp and it can draw 3 -...
  12. P

    building my first battery

    4 are headway the other 4 were supposed to be, but I think they may be knockoffs or "comparable", they are the slightly less capacity cells. I plan to use a solar charger/controller so that I can cut the use at 12 volts. Most of the BMSs I found have a cuttoff at 2V +-.1. That is WAY lower...
  13. P

    building my first battery

    First off, I must admit I am not making a bike, rather a battery system for a ham radio portable kit. I am using LEFPO4 batteries at 15AH each. I am building an 8 cell $S battery. I have two questions. First question; is it best to build the battery with 4 sets (in series) of 2 cells (in...
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