diy solar

diy solar

Recent content by Norm01

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    JK BMS heat function

    I have a JK BMS with heat function and two temperature probes. It works well, I have not been able to find what temp probe activates the heat. Is it T1, T2 or an average of both.
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    BMS wire sizing

    JK 200A BMS. Mine did not come with wiring but Andy tested one that came with 2 x 7G wires which seems small. From my battery to RV I have 2/0. I bought 4G with the intention of using 2 of each to connect the BMS to the battery per pole internally however the 4G is very hard to work with...
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    JK BMS with heat

    Just got a new JK BMS B1A8S20P-H-C, a little confused for the heat cable. I know it switches negative and the cable has 5 negative cable tied together however it also has a black and red wire. Not sure what these are for and of course it’s not in the manual.
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    Parallel battery banks

    I know there has been much discussion about this and the fact that Daly and JKS don’t support parallel unless in Daly’s case you buy a parallel module. I am building a second 12v battery bank. Both batteries will have CATL 302a cells and will both have a B1A8S20P-H-C. If you consider that...
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    Heat

    Building my 12v battery pack with a silicone 20w heat pad. I was surprised of the heat it puts out, reaches 160 deg F quickly. What’s the common installation method. I would think these are two hot to mount directly to the battery?
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    LifeP04 4 to 8 cell

    BMS are JK-B1A8S20P-H-C, found a manual which is basically junk. The power wires are dual connections so for 200A I’m getting 2 x 4AWG. Is that right.
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    LifeP04 4 to 8 cell

    Just ordered 2 JK 200A with heat control. I’ll build two separate batteries for redundancy and hook them up in parallel.
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    LifeP04 4 to 8 cell

    So two 4S1P batteries in parallel to make a 4S2P battery seems suitable. My inverter is 2000w so two 100A BMS would do. Is active balancing needed or a good idea. What would you guys recommend for 2 BMS @ 100a each to put in parallel
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    LifeP04 4 to 8 cell

    I have four CATL 302Ah with a Daly BMS, everything is working great. I have the room to add 4 more cells, do I just get a second 4s BMS and plug them in parallel or is there a way to run them is series at 24v and have a 8s BMS that would output 12v and accept a 12v charge. This is for an RV...
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    Charge voltage

    I do get it and that information is exactly what I was looking for. Thanks.
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    Charge voltage

    I think your missing my question, should I set my BMS to charge to 3.5 or 3.6 now that they’re is series and BMS hooked up.
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    Charge voltage

    My top balancing was done at 3.6v In parallel. I went to series and applied a load and am down to +/- 3.3 now. So if I read you correctly you would,set the BMS charge voltage to 3.5V and 14v total for daily operation. Thanks.
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    Charge voltage

    Hi all, finishing up my 4S battery pack for my RV. It’s made up of CATL 302A grade A cells and a Daly 250A smart BMS. Data sheet on these says maximum charge voltage is 3.65v, I was going to limit to 3.6v however I see on many YouTube videos people limiting to 3.5v. What is the general...
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    LifeP04 blue wrap

    Hi all, I am building a LifeP04, 12v, 302A battery set for my RV to replace two AGM’s. I purchased grade A CATL cells. I also purchased 8020 aluminum extrusion with the idea of building an exoskeleton around the batteries. I didn’t realize that the aluminum case on these batteries is...
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