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Seplos BMS

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    #1052
    The devils
    Registered Users Posts: 512 ✭✭✭The devils


    No problem


    Not at all sold on about 6 days. I was nearly sorry this morning though 🙈🙈

    Facebook market place

    Donedeal

    Adverts



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    #1053
    olympicweights
    Registered Users Posts: 154 ✭✭olympicweights


    Order placed for 16* 305Ah cells & battery cable pack (NKON) and Seplos Mason Kit (Fogstar).

    No going back now......

    Happy St. Patrick's Day!



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    #1054
    buzz11
    Registered Users Posts: 749 ✭✭✭buzz11


    https://www.boards.ie/discussion/comment/121895593#Comment_121895593

    So they added a plate to the base of the case, very obviously needed... luckily offgridgarage called them out on it



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    #1055
    zoom_cool
    Registered Users Posts: 444 ✭✭zoom_cool


    I have a Seplos BMS V3.0 with Active balance Board but when I switch on the Active Balance board a blue light comes on the active switch for about 30 seconds and switches off and I don't see any balancing happening in DEV Studio. The cell difference from Max to Min Cell Voltage is about 150mV.

    Can somebody explain what is suppose to happen should I see the Active balancer working in DEV Studio?



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    #1056
    Eleusis
    Registered Users Posts: 274 ✭✭Eleusis


    No help from seplos via documentation yet and no videos online by anyone on the way the v.3.0 active balancer works.

    Mine stays on for longer than 30 seconds though. I think it's meant to stay on for 24 hours. My deviation is max 8mv in each of 4 batteries. It's mostly around 4mv. Until I find out more info myself, this is the way I'm using it.

    Turn on when batteries are floating. Leave on for as long as I can until solar gone and then start to drain again. Then manually turn it off(hold button in for 5-6 seconds). I believe from my limited knowledge so far that if the balancer is on when it is not floating or close to full it will actually imbalance them.



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    #1057
    graememk
    Moderators, Home & Garden Moderators Posts: 5,871 Mod ✭✭✭✭graememk


    At what voltage (either cell or pack) are you trying to balance at?

    You should only be trying to balance when cells are above 3.4v



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    #1058
    zoom_cool
    Registered Users Posts: 444 ✭✭zoom_cool


    Pack is at 55v



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    #1059
    zoom_cool
    Registered Users Posts: 444 ✭✭zoom_cool


    My understanding is it won't do balancing till difference is above 50mV it's a bit crazy that you need to be watching the batteries going into float as the Active Balancer is connected to BMS so should be automatic it seems to be badly implemented.



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    #1060
    Evd-Burner
    Registered Users Posts: 1,456 ✭✭✭Evd-Burner


    Does anybody know where to install the 4 x temperature sensors while using a 16s2p setup?

    Do these need to be extended or will they screw with their resistance?

    Also should the tops be crimped onto a ring?



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    #1061
    slave1
    Moderators, Sports Moderators Posts: 18,759 Mod ✭✭✭✭slave1


    I have that setup and just placed them between two cells equidistant, I did not connect to terminals, I just used a bit of thermal paste and good tape, all good over a year later

    My stuff for sale on Adverts inc. outdoor furniture, roof box and EDDI

    My Active Ads (adverts.ie)



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    #1062
    dermotx
    Registered Users Posts: 57 ✭✭dermotx


    I know this question has probably been asked many times before but unfortunately it doesn't seem possible to do a search of a whole topic in Boards. I have a Seplos version 3 and a Solis hybrid inverter with 16 Lifepo4 batteries.

    Everything is fine but I'd like to limit the amount of charge to my batteries. At the moment my pack voltage is 54.7v for the pack which seems to equate to 99% charge. For battery longevity I'd like to charge the batteries to about 90% or around 53.6v. What's the easiest way to do this please?



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    #1063
    graememk
    Moderators, Home & Garden Moderators Posts: 5,871 Mod ✭✭✭✭graememk


    https://www.boards.ie/discussion/comment/122116490#Comment_122116490

    It's LFP, you can't charge to a voltage limit that low.

    Charging to 54.7 is only 3.41v and I bet once you stop charging they settle straight back to 3.3x

    They'll last for a v long time like that



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    #1064
    dermotx
    Registered Users Posts: 57 ✭✭dermotx


    Great stuff. Thanks very much for that advice.



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