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  1. V

    280ah cells for $21 Grade C

    thanks for the info!
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    280ah cells for $21 Grade C

    who is Amy working for these days? My old messages from her switched over to some other lady at xuba
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    1120ah Bank Build for 12V... Opinions Wanted Please

    Yes! Best thing ever made! you can basically make darn near anything you can make in an oven or grill. Pizza, steak, fries, tater tots, cookies, cinnamon rolls...
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    1120ah Bank Build for 12V... Opinions Wanted Please

    I run my ice fishing trailer off of a 560ah battery i built (4s2p). It works great! I've been able to boondock for a week without charging at all. that's running my 2kw diesel heater in sub freezing temps. I also have a 2000 watt inverter and do all my cooking on a pizza oven. Also run my tv and...
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    sent it to you.

    sent it to you.
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    Inverter-charger or Inverter+charger? Honda Odyssey with 560ah 12v lifepo

    I have kind of a simular need in one of my small trailers. I decided not to go with an inverter charger because I've been burned in the past with all in one type devices. Plus with my batteries I want to choose when they get charged or not. So I have my charger on a switched outlet that I can...
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    How to position different IR cells in the battery

    I've wondered the same thing but got no answer for you other than I think I would side with your friend on putting lower resistance cells inside the pack.
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    Installing 3 12volts 310Ah (930Ah total) battery banks on a RV

    I have two 280ah 12v packs paralleled in my trailer. I run a seperate 4s 120amp BMS for each pack. I run a 2000 watt inverter from it. It works great for me. IMO the only other way to get around using only 1 BMS is to have one that controls a large contactor. The Eve 280ah cells fit nicely into...
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    Will my RC battery charger work for top balance?

    you have a Life setting on that charger--- use it! put your pack together and charge with your 12v charger, then pull it apart and top charge each cell with your rc charger. I do it all the time. or you can put the pack in parallel and top charge all together.
  10. V

    16 cell 12v battery. What is the best configuration?

    Got them all packed up an top charged, waiting on crimp terminals
  11. V

    Group Build - 12v Battery Module (EVE 280AH)

    Here's the problem with your idea. not everyone has a 3d printer to print something like this especially for a 280ah cell. Second the performance of PLA isn't up for the task. 3rd an injected molded part is going to be costly just because of the mold needed $20-30,000. Forth the cell variation...
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    Best 2000 watt pure sign wave inverter under $400

    I got the Samlex SSW-2000-12a It performs well and handles my 1500watt load just fine, the only complaint is the fans are loud. I do reccomend buying from https://www.donrowe.com if you are in the US. I got their fuse holder, fuse and their 1/0 cables and their stuff is very nice quality and...
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    Temperature control of LiFePO4 battery banks?

    I currently have a 12v 560ah battery setup in my trailer, just spend 5 days running off of it and I'm very pleased with the performance of these cells. when I looked at the cells they remained sub 0.01v for cell balance even while pulling 60+ amps. My avg temp was around 55*F, I also let my...
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    Temperature control of LiFePO4 battery banks?

    It’s not very difficult to get some 12v heating pads and a temp controller. If you are really worried about it.
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    16 cell 12v battery. What is the best configuration?

    Thanks for the input. I have a resistance tester but I find it’s not very repeatable so (it does read SOC good) I think the best way for me to match is do some test cycles of them and match that way.
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    16 cell 12v battery. What is the best configuration?

    My plans changed for some cells I have and I’d like to put them into my rv. I’d rather not go 24v right now and stay with 12v. That said I have 16 90ah cells and 4 bms’s on hand. I won’t exceed the current draw even for one bms so there’s multiple ways I could go. My first thought is just make 4...
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    Need help charging my 8S 280 Ah bank

    Buy a RC battery charger from a hobby store. Most all of them have mutiple charge profiles as well as balance charging. Connect your all in one solar charger to do the bulk charging your BMS will shut off when the first cell goes too high. Then pull part the pack and top charge the rest of the...
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    Best 2000 watt pure sign wave inverter under $400

    Thanks all for the input I decided to go with the Samlex
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    Best 2000 watt pure sign wave inverter under $400

    Found this xantrex model that fits in that price range. So now to decide this or the samlex https://www.hodgesmarine.com/xan806-1220-xantrex-prowatt-sw2000-2000w-true-sinewave-inverte.html
  20. V

    Best 2000 watt pure sign wave inverter under $400

    Looking for what people would recommend My max usage will be around 1400 watts (for 30 minutes) I figure I should get a 2000 watt inverter for some wiggle room. Here's what I have for a list...
  21. V

    Pack / Cell compression Optimized By Using Springs.

    If you know of any automotive machine shops in your area its not uncommon for them to have spring testers that would work well for this.
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    Pack / Cell compression Optimized By Using Springs.

    Thanks for the props Bob! Here's some screen shots for people interested.
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    EVE-280 cells should these be clamped tight or spaced for expansion?

    My worry with this is could you over compress because that seems to be worse than no compression at all. Second will your box be strong enough to hold up to that unknown force?
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    EVE-280 cells should these be clamped tight or spaced for expansion?

    Just look in the plumbing department of your favorite home improvement store. They sell clear flexible tubing the match the ID size of the tubing to your threaded rod diameter. its pretty cheap!
  25. V

    EVE-280 cells should these be clamped tight or spaced for expansion?

    I decided to make a calculator to be able to make an easier job of selecting springs. PM me and I will send people the file to try out.
  26. V

    EVE-280 cells should these be clamped tight or spaced for expansion?

    Not a great choice IMO it would not allow for expansion and compression of the cell. The last thing you want to do to these cells is over compress as you can see from the charts a few pages back. Something like this with a longer working range would be much better. If you compressed this spring...
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    EVE-280 cells should these be clamped tight or spaced for expansion?

    Here's my plan for the batteries in my trailer. Space was the reason to stack them.
  28. V

    EVE-280 cells should these be clamped tight or spaced for expansion?

    You would need to use a load cell and convert that 12psi to lbs per sq inch.
  29. V

    EVE-280 cells should these be clamped tight or spaced for expansion?

    While a good idea you would need to stack a ton of belleville to compensate for the cell expansion and contraction. And then at that point is it cost effective when you can buy a die spring that will do the job for the price of one belleville washer?
  30. V

    EVE-280 cells should these be clamped tight or spaced for expansion?

    My take at looking at the chart I'm going to try and shoot to be within the 6-12psi range and not worry about getting it exact. The one thing I haven't seen in this thread is anyone accounting for cell expansion and contraction. One needs to take this into account when selecting springs as to...
  31. V

    Is this cell bad?

    Nope tried a q-tip and a pick.
  32. V

    Is this cell bad?

    Got this eve 280ah cell and it looks punctured where the screw goes. Second picture is of one of the other cells
  33. V

    Did LiFePO4 cells get this cheap?

    Fedex mislabled one of my boxes and it went missing, just got the replacement cells a couple weeks ago. I have not tested the second set of ten. Of the first set of 10 i ended up getting 2 cells that were lower resistance than the others. But even with that I got 89 and some change AH when I...
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    New Supplier for 280Ah cells: Shenzen Basen

    FWIW I placed my order on 9/17 shipping tag was made 9/20 arrived in cali on 10/24 delivered on 10/28. I havent had any time to do any testing but all cells are in perfect condition and packed very well (better than Xsuba). I did however get shorted on buss bars I asked for a double order and...
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    Cheapest DIY 12V 100Ah LiFePO4 battery build? 60Ah?

    Just order some cells from alibaba plenty of examples in this section of the forum
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