diy solar

diy solar

Recent content by technerd1988

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    Pack / Cell compression Optimized By Using Springs.

    I just used the kind you can get in a can at home depot or walmart....etc. I then sprayed the bottom of the box and used a piece of flat metal and evened it out. I then put each pack that I just taped together in the box and filled the voids with expanding foam. I just used cheap noco battery...
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    Pack / Cell compression Optimized By Using Springs.

    foam is the way to go in a mobile application for sure. Thats what I did. I have such an uber low C rate though. I draw at most 200 amps while Im cooking and I have a huge bank, a little more than 1000ah with a bunch of 4s packs
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    Fire!! Never cover LiFePO4 with wood!!!

    I'm not exactly sure. I know my oldest are calb ones and I have a lot of aluminum cells too from various manufacturers. I use them in my box truck conversion RV. I just compress them and nothings ever come lose. I use overkill wire sizes too 0 awg, even though I only draw 50-75 amps per pack. I...
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    Fire!! Never cover LiFePO4 with wood!!!

    Something tells me loctite is a no no on battery threads. You don't need it. I've had many of these cells in service in my rv for years now. It looks like nothing shorted rather, but you made a horrible connection. NEVER cover batteries with wood, especially the vent side. clamp your cells...
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    LiFePO4 heating pad for cold temperatures

    Then what is the thermostat for? How did you get it to come on only during charging? Did you use the canbus on it? same thing I have. If it don't get below 0C for charging or -20C for discharge in there you dont need to worry about heaters I think. The problem with using heaters is that you are...
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    LiFePO4 heating pad for cold temperatures

    you might as well just do the xiaoxang BMS like I did with the low temp cutoff as well as high temp cutoff. I have the 4s 12v version on each of my packs. I got two more coming with my CATL cells(8 of em 280ah). Im gonna have over 1000ah after I add them beasties.
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    LiFePO4 heating pad for cold temperatures

    yeah but if you have them in storage and the heaters constantly run wouldn't this drain your batteries down? In that situation I'd just slap anderson connectors on each pack and bring them inside when not in use like I did until I went full time rv life. I even think the manufacturers who put...
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    LiFePO4 heating pad for cold temperatures

    Seriously why not just use fans like I did? Use the power your using already in your space to keep them at a comfortable temp 24/7? Unless your using them in a shed, which the battery heaters aren't such a bad idea..but then you'd have to worry about cooling too. Its so simple
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    LiFePO4 heating pad for cold temperatures

    Why not just keep the batteries inside with you. we are uncomfortable at 32f so unless you like freezing, this will be fine. I have little 12v fans inside of each of my battery boxes in my RV and my batteries stay cool and between 40f to 75f which is whats comfy for me. I have a pretty large 12v...
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    Lifepo4 mishap. Can they be salvaged?

    How exactly does compressing the cells help with the gas? I'm not doubting your method because I've never tried it...but I do have this bloated 210ah cell here...its only puffed a bit on one side...its not part of the system anymore so I guess I should try...but I wonder why this works? I seen...
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    CATL batteries

    Have you capacity tested these yet and IR? I'd like to know because I just ordered the same ones, 8 of them for another huge 12v pack so I'm above 1000 amp hours after these arrive
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    I think I froze my battery to death

    This is pretty much what happened to me too ckent. I have a bloated 210ah cell though which they replaced under warranty since my BMS has low temp cutoff. The one cell just failed weirdly and bloated and I didn't notice it till all the cells were less than 2v. The rest recovered and are back to...
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    Recovered cells really happy

    So one of my banks went out one day, and I wondered why. I took apart the pack and found one bloated cell in there. My cells are 210ah prismatic aluminum case cells. The funny thing is the BMS in my RV conversion cut them off and I didn't notice it till they had low voltage. I got the bloated...
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