diy solar

diy solar

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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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    Trusted 280A LifePo4 vendor

    Ok, thanks. Just bought from Amy. Excellent communication.
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    Trusted 280A LifePo4 vendor

    Hi all. Made the mistake of buying lifepo4 cells from aliexpress and it looked to good and was as they were never delivered, vendor tracking says they were and won’t refund. I will follow the AliExpress claims as well a PayPal but doesn’t look promising. Vendor was Shop912316039 Store. Can...
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    New RV, battery advice please.

    One question I have, can I balance/charge these batteries individually with a DC power supply.
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    New RV, battery advice please.

    Thanks, looking at a Daly 4S 200 or 250A. A little confused about fan or no fan, I do not expect any high load for more than a few minutes (microwave). Are all new Daly‘s low temp charge protected and prices seem to be all over the place. So, 200 or 250 and what should I expect to pay. I...
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    New RV, battery advice please.

    Hi all, just purchased 4x3.2v/280A cells. My largest power draw will be a 2000w inverter, charging is limited to the best of my knowledge to 60A. This may be a stupid question but does the BMS need to handle charging amperage or charge/discharge amperage. Obviously this will greatly change...
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    New RV, need advice

    Inverter is 12v
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    New RV, need advice

    It’s full transfer to shore power or generator or alternator as needed. its a Xantrex 2000w. I do not want to replace any of the factory equipment, just want to build my own lifepo4 batterie bank to replace the 2x 100A AGM because the $5000 upgrade was ridiculous
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    New RV, need advice

    I may of made this more complicated than it needs to be. The RV is an LTV Unity 24TB. It comes with 400w of solar and a 2000w inverter. Batteries are 2 x 100A AGM, no matter what power needed will only be 2000w to the inverter, not sure the brand but it is high end. I do not expect to run my...
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    New RV, need advice

    Hi guys. Still waiting for my LTV Unity 24TB. It will have 400w solar and as said a 3600 lp generator. Batteries as ordered are AGM, I believe 2x 6v. These are what I want to replace. I’m an electro technician by trade and have all the tools, looking more for what you guys feel and...
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    New RV, need advice

    Hi all, I purchased a new RV yet to be received. It’s a class B+. I ordered the 400w solar panels and 3600w LP generator. The upgrade from AGM to Lithium was approx $5,000 which I felt completely crazy. I did my research and my 2000w inverter, dc-dc charger and solar controller can all be...
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    New RV, battery advice please.

    Oh, BTW. Since my RV will have a Diesel engine I may invest in an Espar or Webasto diesel heater. Compared to the RV heater that draws 8A, these run on less than 1A and would draw diesel from my main tank. These heaters are about $1,000 now and put out 25,000btu’s. You can also do a Chinese...
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    New RV, battery advice please.

    It’s 400W total, 4 x 100W roof mounted panels. My Onan 3600W LP generator is auto start and can start on interior temp to cool the RV and can start on low batteries to charge. All these settings are user adjustable. The RV is a Class B+, 24ft. I know with the systems I have that the two...
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    New RV, battery advice please.

    Hi all, new here, first post. Been watching a lot of youtube videos about batteries/solar and trying to learn as much as possible. We recently ordered an LTV U24TB RV. Won’t get it for at least another year as there’s huge backlogs in the RV world. I ordered the 400w solar panels, it will...
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