Recent content by NVS

  1. NVS

    Daly 4s Smart BMS wildly fluctuating cell voltages while charging

    Good. I always solder them I hate relying on just crimping them. Specially since mine will be in a RV bouncing down the road
  2. NVS

    Daly 4s Smart BMS wildly fluctuating cell voltages while charging

    They will all start out at the top of the power curve. You may get some fluctuations at the lower end but that is ok. As most people don't run down to less then 10% of charge remaining.
  3. NVS

    Daly 4s Smart BMS wildly fluctuating cell voltages while charging

    Did you top balance your batteries? That will take care of this issue. Connect all 4 cells in parallel then charge to 3.65v. I leave mine sit overnight after they reach 3.65 then top them off one more time. The reconnect in series you should be good to go.
  4. NVS

    Batteries for sale

    Yes I bought the same modem pack. Best I can do is $0.50 per cell plus shipping. That's what I paid for mine. And I'll still need to test all of yours before I can use them.
  5. NVS

    Batteries for sale

    I would be interested if you could ship them to Ohio. Have you capacity tested them? And how much?
  6. NVS

    Battery bank for trolling motor 24v 8s or 2x4s ??

    I would think an 8s pack with one 8s bms. Then use a 24v to 12v converter. For your 12volt side. Or if you have room put in a 12v battery for the 12v stuff and not take the power away from your motor battery.
  7. NVS

    What to do with 29.6v batteries (8s Lithium Ion)

    With lithium ion you could only charge them to 4v per cell or 32v per pack. It will extend their life. Just run their cycle 22 to 32volts or 2.7 to 4.0 volts per cell
  8. NVS

    Help with battery design - 18650 - 14S16P

    Are you using any kind of cell holders like these? Baimeixun 20pcs 4x5 Cell Spacer 18650 Battery Plastic Holder Bracket https://smile.amazon.com/dp/B07BN7K8CX/ref=cm_sw_r_apan_glt_fabc_RPVDW0ZV8JETXHNG6A1H?_encoding=UTF8&psc=1
  9. NVS

    Cheap battery box for 18650 batteries.

    So I tinker around with different projects and needed a battery box for 18650 batteries in a 7p4s ( could also make 4p7s ) configuration. I found I could make this pack with bms and it fit perfectly in a plastic recipe box. Hope this helps someone out. Index Card Holder 3 x 5 inch - Recipe...
  10. NVS

    Help with battery design - 18650 - 14S16P

    Here is a calculator to make your battery packs easier. Especially if you use recycled batteries. https://tools.cellsaviors.com/pack-calculator
  11. NVS

    Help with battery design - 18650 - 14S16P

    Just remember it is important that your pack capacity should be equal. So if 1 pack is 10ah they all should be 10ah. You also want each individual battery to be close in capacity. So adding on to an existing battery pack may not be a good idea. I would try to calculate your needs and build a...
  12. NVS

    Did I get the wrong stuff?

    Most cpaps are dc voltage so all yo need is a 12vdc adapter. Like this. KFD Car Charger DC Adapter for Resmed S10 Series,ResMed Airsense 10 S10 AirCurve 10 Series CPAP and BiPAP Machine,90W Resmed S10 370001 37297 Rockpals 300W/500W Vehicle Power Supply Cord Cable Charger...
  13. NVS

    New from Ohio

    I was looking for this the other day. I built a 7s120p battery using the old one you mentioned, and now it doesn't work. Thanks for rebuilding this calculator as I build battery packs for my other creations like the Bluetooth speaker in my avatar.
  14. NVS

    MPP Solar not showing SP1 SP2

    Did you install the parallel kit to make them split phase compatable? https://watts247.com/product/mpp-solar-series-parallel-kit/
  15. NVS

    What do you think the market for Lead-acid battery replaced by Li-iron battery

    The only issue with that is the weight of the LA batteries is used as the counter balance for the lift capacity of the forklift. So you would also have to add weight to the lift to offset the weight loss of going to lifepo4.
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