diy solar

diy solar

Recent content by vtx1029

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    Buss bar question

    Perfect! Thanks
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    Buss bar question

    I'm looking at building a 2p4s battery in this configuration. I was wondering if I could make the top and bottom buss bars from a single piece of copper rather than making individual cell to cell buss bars. The only down fall I could think of would be expansion and contraction of the cells but I...
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    Cell Placement - When building a Battery Pack... Thoeries?

    I also didn't charge to 3.65v so the capacity loss is not all from 3.0-2.5v range. I think the temp played more into my numbers than I first thought as I'm testing in an uncontrolled garage and had outdoor temp ranges from 80-20*f for them two weeks.
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    Cell Placement - When building a Battery Pack... Thoeries?

    Read everything I wrote. The test was how I was going to use them from 3.5-3.0v NOT 3.65-2.5v my cell tests from 3.6-2.5 were all over 230ah. Yes docan. I also think temp has a large part in cell testing. If I ever do more testing I will most likely set up a temp controlled box (cooler) to have...
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    Cell Placement - When building a Battery Pack... Thoeries?

    I'm doing about the same setup 2p4s 230ah cells. I don't trust the ir readings of my tester. But I recently got an EBC-A40L and I've been capacity testing the cells individually and matched in pairs. My plan is to pair lower capacity cells with higher capacity cells to create as close to matched...
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    Foshan Guangxinneng New Energy Technology Co.,ltd.

    shipped or not? with shipping that's a deal.
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    Building a battery box. My first battery project.

    3x8= 24 I don't understand what the problem is? Make your own buss bars from copper strips
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    Building a battery box. My first battery project.

    no 3p 8S for 24v and yes 1 bms for the pack
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    Building a battery box. My first battery project.

    IMO the best way to do this is to capacity test each cell on its own then pair up the 3 cells in parallel so you have 4 packs of equal capacity. Then connect in series.
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    Cell order when wiring in series.

    I should have defined this better. Same capacity cells. I've just done my own testing on the cells so say they are 230ah cells. One maybe 232ah to say 228ah.
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    Cell order when wiring in series.

    Does anyone have insight on what is the best order of placing cells when say wiring a 4s pack. If I have 4 cells of different capacity should I put the highest two capacity in the middle of the pack, on the outsides or ??
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    Jbd monitoring screen

    depends on what open ports you have on your BMS
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    2P4s configuration

    Thanks for the info! I have a capacity tester but not sure if I have the time to test all of them separately. I will for sure top balance!
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    2P4s configuration

    Looking at making a 12v 460ah pack from 8 230ah cells. Any problems or pitfalls in doing that?
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