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  1. Tasemu

    Adding a new, different size battery to my lifepo4 setup?

    Hi all. Up until recently I have been using a 280AH Lifepo4 bank on my narrow-boat with a Daly 250A BMS. Over a winter and a year or so, I noticed that I did not give the batteries time to balance and they had eventually gotten so out of balance that I felt the need to do another top balance. I...
  2. Tasemu

    Extending Daly Smart BMS temperature sensor?

    Thanks mate! Do you happen to remember what wire size it is? I can wing it if not. :)
  3. Tasemu

    Extending Daly Smart BMS temperature sensor?

    Hi all, In my setup I am unable to easily get the temperature sensor on the cells for my battery. Does anyone know if it is possible to extend the temperature sensor using wires, or will this cause a change to the value? Cheers!
  4. Tasemu

    100a daly BMS not giving 100a

    That makes sense if mine cuts out at about 20-30% short. Guess I gotta upgrade.
  5. Tasemu

    100a daly BMS not giving 100a

    Apologies, typo there, I meant 12v 4s. :)
  6. Tasemu

    100a daly BMS not giving 100a

    Hi all. I have my lifepo4 setup working for a few months now but i've noticed that if I draw more than 70 amps from my 100a model, it cuts out for over current. I have a 2s daly smart bms 100a. Is this common with daly or could it just be my unit? Thanks in advance!
  7. Tasemu

    Daly smart bms turns itself off

    Is it a smart BMS? It could be going into sleep mode. However I assume it should wake up if any current is pulled or pushed into the batteries.
  8. Tasemu

    Powering large loads with a 100A BMS and Relay

    Yep it is an inverter, here is the link https://www.sunshinesolar.co.uk/Item/C150012 :)
  9. Tasemu

    Powering large loads with a 100A BMS and Relay

    Hi all! I remember hearing a while back that you can power large loads from your batteries, even if you have a small BMS, by powering a relay with the bms output. Is this a viable and/or recommended approach, could anyone elaborate on the set-up? I have a 100A Daly Smart BMS that cuts out when...
  10. Tasemu

    Macbook pro charger triggers BMS disconnect

    It allows you to only set a cell disconnect, then it derives the total voltage disconnect from it, which is not settable itself. :)
  11. Tasemu

    Macbook pro charger triggers BMS disconnect

    Update: yet to have a LVD, but when running 80A through a heat gun it did cut off, maybe because its a daly and isn't actually able to handle the claimed 100A?
  12. Tasemu

    Macbook pro charger triggers BMS disconnect

    I've just set my cut-off to 11v, perhaps its just the inverter and the stuff using it pulling a surge of power briefly, which triggered my high LVD. Currently running the TV, Laptop and Inverter and it has yet to disconnect. Lets see how she goes, thanks for all the help. Will report back with...
  13. Tasemu

    Macbook pro charger triggers BMS disconnect

    Cell volt disconnect = 3.1v Sum total volt disconnect = 12.4v With the new daly BMS smart bluetooth thingy, it seems most parameters are configurable.
  14. Tasemu

    Macbook pro charger triggers BMS disconnect

    Can I delete these damn double posts?
  15. Tasemu

    Macbook pro charger triggers BMS disconnect

    I set it specifically in the app because... i saw it somewhere in a thread on here? Could you recommend a LVD?
  16. Tasemu

    Macbook pro charger triggers BMS disconnect

    Side Note: I'm not sure if this is a point worth making, but my 12v fridge just turned on, drawing about 7 amps and the battery is not breaking a sweat. 13.1v and chugging along. Maybe its a faulty inverter...?
  17. Tasemu

    Macbook pro charger triggers BMS disconnect

    I'll do this test now for each cell. Top balanced the cells using a bench power supply and then charged to 14.6 using a sterling procharge ultra until the current hit 0.
  18. Tasemu

    Macbook pro charger triggers BMS disconnect

    Ok i've got it to happen again now. I do see the voltage at the battery terminals pulled down to 12.9 briefly, then 12.6 for a split second before the BMS shuts down. Otherwise it sits happily at 13.1v regardless of the current i'm seeing drawn. Also its worth noting I haven't had this issue...
  19. Tasemu

    Macbook pro charger triggers BMS disconnect

    The battery appears to be sitting at 13.1v even with -15A current being drawn... This was definitely causing the power cuts earlier today that caused this post.. I'm very confused now. Running the battery charger and the TV at the moment...
  20. Tasemu

    Macbook pro charger triggers BMS disconnect

    Will do that now, i've just tried a heat gun on the lowest setting directly from the inverter socket and the power cuts out immediately. About half a second. Unsure if the batteries could sag that fast.
  21. Tasemu

    Macbook pro charger triggers BMS disconnect

    12v pack also, should have stated that earlier.
  22. Tasemu

    Macbook pro charger triggers BMS disconnect

    1: Self build 280ah Lifepo4 Cells - SOC was charged to 100% a few hours ago and very little usage since 2: I've just noticed that it happens when the tv is on too 3: Yeah the BMS has an app. I notice the current out sits at about 8-9 amps, then (and this is strange to me) the pack voltage slowly...
  23. Tasemu

    Macbook pro charger triggers BMS disconnect

    Hi all! I've got my new lifepo4 battery bank installed and connected to the inverter. Everything seems to be running fine until I try to charge my macbook pro, at which point it seems the BMS cuts all power from the battery and everything shuts off. Could anyone advise why this may be...
  24. Tasemu

    Top balancing my new lifepo4 cells

    Excellent, I've got that all set. Just wanted to make sure it wouldn't cause issues when it came time to install the shunt.
  25. Tasemu

    Top balancing my new lifepo4 cells

    Batteries are almost fully top balanced at 3.45v in parallel. I have another question though. My Victron Smart-Shunt is not arriving for another week. Is it a bad idea to install this battery as-is for now and then just charge it up to bms cut-off again before installing the shunt? Thanks in...
  26. Tasemu

    Top balancing my new lifepo4 cells

    Oops just changed to opposite sides
  27. Tasemu

    Top balancing my new lifepo4 cells

    I've rearranged my cells into parallel but do not have enough bus bars, i've used a spare set of wires to connect the cells but 2 of them are at 3.36 and the other 2 are at 3.41 now. Should I expect these to level out? Power supply is currently supplying power at 3.6v (can only charge to 1...
  28. Tasemu

    Top balancing my new lifepo4 cells

    I've hit the high voltage cut-off in series, just reconfigured to parallel and accidently got a big bang when i shorted a cell. all appears to be charging now though. Not sure how long the parallel charge will take. Really not looking forward to have to capacity test these cells and charge from...
  29. Tasemu

    Top balancing my new lifepo4 cells

    Haha nah, its just the light from the door crack. That's the plan, however the cells are looking like they're staying in balance so i may not need to parallel
  30. Tasemu

    Top balancing my new lifepo4 cells

    Top balancing is going well I think. Wish I had a grid option though, gonna be a fair few hours on the generator.
  31. Tasemu

    Top balancing my new lifepo4 cells

    Thanks for the help! I got my daly bms all hooked up and activated. However it has now appeared to go to sleep and bluetooth is not working. Does anyone know how to wake these up? TIA :) P.S: Bench power supply is in the mail!
  32. Tasemu

    Top balancing my new lifepo4 cells

    Hi all! Today I received my new 4x lifepo4 280ah cells. I live on a boat and have 2x victron 100/30 mppt solar controllers and a sterling 20a battery charger. I want to top balance my cells from the generator and maybe the solar (its winter in the UK). I cannot really afford a bench power...
  33. Tasemu

    LiitoKala 100Ah

    So he puts them in 4s blocks and charges to 95%, then puts them in parallel and finishes the charge. Two questions if I may: 1: How does he know 95% state of charge in a 4s block that hasn't yet been balanced? 2: Is there not a risk of overcharging a cell while in 4s configuration? Thanks! :)
  34. Tasemu

    LiitoKala 100Ah

    Jesus I didn't realise it would take 2 weeks to charge them. This is gonna be awkward on a boat...
  35. Tasemu

    Troubleshooting Daly 4S 12v 100A BMS

    You may need to reset the BMS by shorting B- and P-
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