EASIEST DIY 12-Volt 280Ah LiFePO4 Battery // Step-By-Step Build

Congratulations my friend the best battery for lifepo4, it's a big Peck.

Is it possible to make 2 of these 12v battery’s and connect them parallel for a 12v two battery capacity

200ah 12v lifep04 from redodo are 459. shipped and i even got a 30.00 amazon coupon so it was 429.00 kinda hard to beat, i am running a pair of them in series with my 3kw powmr all in one inverter for my camper.

It's more dangerous to get into a car and drive down town, but I've never had a disclaimer about that. Lol

Can this be use to run 5000 watt amp on car radio

I just cant handle the strees of ordering on alibaba

nice

Actually the wires are on the positive of each cell on all the batteries I've seen or worked on.

I'd like to build a 36 volt for my EZGO golf cart. How many cells would I need to equal six 6 volt Trojan T-105's ? And, can it be done ? Great videos, enjoy watching......

One year later.... how cheap can they be built now?

machine can help you

Great info.Thanks

Great tutorial, can’t be more explicit. You got me. Cheers

Thank you. I bought them from Shenzhen New Positive Energy Electronics Co., Ltd..

Nicely done, straight forward, simple to follow by design. Thanks for sharing the education. I’ve got 16 cells 100ah that need a Bms to construct either a 12, 24, or 48v battery. This has been very helpful in understanding what needs be done to continue. 👍🏼

I'd like to build a 36 Volt package for a ezgo golf cart.

Life is easy with those big cells

bought 2000wh ac200p for $650. cant beat that on DIY.

Hi, since Im taking a deep dive into renewable energy, I understand there is a cost saving in a DIY version of a battery vs buying a LiFePo4 battery. My question is the following, how big or small is the safety concern of a daily use of a system built DIY vs just buy a portable solar generator system with a battery bank integrated in the same compartment like the Bluetties and Jacakrys? I do like to tinker with stuff, and you made it look fairly easy to build that 280AH battery. That motivated me to think in building a system.

Can i solar trickle charge a LI battery,the type used on a power tool.

I have a tight build width - whats tbe widt6of these 280ah cells in mm? - thanks

i got an aliexpress 150Amp clone of that bms and a BT module for i think under $80 USD shipped, if not around $75, that was a year or two ago

👍

I hooked my daly sensing wires to the positive terminals is this a different set up or does it not matter ?

I do not understand how the BMS can balance the batteries separately with the charging power coming solely from the negative and positive in the end and beginning of series. Does the BMS balance the batteries through the thin "sensor" wires?

I am using 1500AH 48v lead acid battery for my home UPS system. Those are simple, discharge only 30kwh max, charge them up with the inverter with only bulk and float/equalization. And they will basically be equal. Charging from both parallel ends of the 6 packs of 4 12v batteries.

Edit: my lead acids are brand new and i expect them to last atleast 3 - 5 years of 40% DOD before throwing them away, but that's not hindering me from learning all i can about lithium and BMS (BMS which i understand nothing about).

Edit again sorry: If i would want to build similiar packs like the one you built here, but make them in series to 48volts and build 6 suchs packs, Do each pack need a separate BMS? do each pack get a separate positive and negative from the inverter? or how does it work when you work with lithium in seris and parallel?

Nice work! Why was BMS chosen for a maximum current of 120A? It's only 1.44 kW. Is this power enough? Your battery can give much more, at least 2 times. For example, 200A (power = 2.56 kW) or even 250 A (power = 3.2kW). What is the basis for choosing a BMS with a maximum current of 120A? Thanks for the answer!

How is one of these cells 280ah?

If you don't want large Ah , lead asic is still good enough for you compare to cost and lifespans of it.

nice point on the length of the wires thanks!

Have contact with Cassie Wang and have 2 options 280ah EVE cells 556$ and 302 CATL 565$, which would you buy?

@freelyroaming did you have any problem with the cellar supplier?

Cost per kwh? Your final cost excluding your time.

im building a pack myself for workdue to supply issue what does the 120amp rating on the bms stand for is that the most amps it can handle? if so how would i go about making a pack that can handle 800amps. this is for a mobile hydraulic stage

32V battery build. On my boat I have 2 banks of 4 8V lead acid batteries that I would like to replace with IiFePO4. Each battery banks is independent for port and Starboard motors. Currently I also have the 32V inverter connected to one of these banks. Having searched the internet I quickly realized this will be a custom battery made from cells like in the video. I can find 32V 10S LiFePO4 BMS units. The difficulty I'm having is can I use the same battery bank I make to start the engines which require 1000CCA or should I split the battery banks having one a traditional lead acid for starting each motor and the LiFePO4 bank dedicated for the inverter. My next challenge will be modifying the charge parameters of the outback inverter/charger.

Correct me if I'm wrong but last time I checked, red was positive and black was negative. You appeared to have connected the blue bms negative leads to the positive terminal on the battery pack. Just an observation

Can I use smaller BMS than cell nominal AH?

For example, I got a 4x280Ah cell and use only 120Ah BMS? Is that secure? Can I use an even smaller 60Ah BMS?

I’m very confused on how many AH are in each individual cell. Does each cell contain 280 Ah or is it the set of 4 that make 280Ah?

So for an application such as car audio that has high current draw what BMS should I use?

Nice video, Im thinking about building one myself and took contact with the reseller you linked, so did you have any problem with them and Cassie Wang there said it would cost 560$ with shipping and all to Europe. So you think that this is a good price or should I wait?

Does this bus do active or passive balancing?

Excellent. I like your posts.

So you have to use a special charger on this battery or can I treat it like a lead acid battery in my camper and just let the solar and Jeep charge it as if it was a standard house battery and the BMS does all the magic? I keep seeing people specify special lifepo4 chargers that pretty much defeat the purpose of these.

I did this set up with just the 120 amp bms. I have a 40 amp. Rich charge controller and two 200 watt. Panels. Also 3000 watt pure sine inverter. I have been all over the app and can't get my cells to charge past 13.4. I put my Noco genius 10 on it with the bms hooked up and I only get 13.4 and only 3 out of 4 red bars on the charger no matter how long I wait. When I charge the cells without the bms hooked up, I get 14.4. Then, as soon as I hook the bms up it takes it down to 13.4. I have calculated about 50% capacity. Maybe less. The only thing I can think of is the bms needs to be a 250amp? Advice would be perfect. Maybe parameters I need to change? Thanks

Nice👍👍

Where is the best source to purchase these batteries?

What is the discharge rate of these cells?

Thanks for sharing the knowledge. As right now, you can buy Chins 300AH around $970. I don't see much of the saving because the cost of 4 cells 3.2v is $750 + $130 BMS + bluetooth.

Pressure from tape will damage edges of first and last cell