DIY 48v LiFePO4 Battery w/ $72 Bluetooth ANT BMS (low temp cut-off!)

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[WillProwse]

Check out my best-selling, beginner-friendly 12V off-grid solar book (affiliate link):



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FTC Disclosure Statement and Disclaimers:
Every video includes some form of paid promotion or sponsorship. Some links on this youtube channel may be affiliate links. We may get paid if you buy something or take an action after clicking one of these. My videos are for educational purposes only. Information is subject to change/update at any time. Electricity is DANGEROUS and can kill. Be smart and use common sense :)

DIY Solar Power with Will Prowse is a participant in the Amazon Services LLC Associates Program,
An affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com

[seanathanq]

can you update this with this BMS? I am trying to build a 48v battery system and the EBAY listing is no longer there. thanks for the videos I have learned a lot.

[EpicAdvanture]

I want this for 4s 12 volt!
Also, it makes me so happy when you get so excited over these little devices, Will.

[Tuttyman]

Great video Will, I installed the same ANT BMS a few months ago in my 48v 200 ah battery and it was a pain to get it to work, but when it finally did, everything is going great, the BMS is excellent, I only wish they had send all the information when I bought it, so I did not have to search all over the web for it.

[SteveWrightNZ]

After sitting in the doctors' waiting room many times over the years cursing my decision not to wear safety equipment, I now solemnly wear safety glasses whenever I am remotely at risk. The bloke across the road from me just lost an eye from small high speed things jumping out of unexpected places, which brought the whole lesson home fairly abruptly. I have a couple other nasty injuries that just won't go away. Just wear the glasses, people.

[wideawaketotruth]

Hey Will, so I did a general search for ANT BMS and your video popped up. I just ordered a 180 amp hour to 450 amp hour ANT BMS. For my system currently consisting of 304 amp hour Eve 3.2 volt * 16 cells. Which are on their way from China and should be here in another month or so. Truly I must thank you for this video which is going to save me a tremendous amount of time when I put it together. Originally I was looking for a jbd BMS that would match what I wanted to have for my system. Unable to find a jbd I thought hey I'll get the ant which really looked the same and it was from the same store. IC GOGOGO which led me to believe the same manufacturer is building both products. Not sure if that is the case. Though I really appreciate your video seriously Will you're a tremendous amount of help thank you so much.

[NikkyKnowsUNzs]

If we got 1% of the young people on the planet to have this kind of passion, we could easily get everyone off the grid with true efficient electrical this kid, guy(same thing in this case!!!)

[MaxGoddur]

Your videos are informative and research is without question some of the best I have seen.

Just finished building a 13s4p 52V battery pack for an E-Bike. I opted for the YIT 48V 13s BMS COMMON PORT board.

My first step after the pack was assembled was to connect the BMS B- thick wire to the negative side of the battery pack, in this case, 18650 Li-ion cells.
Next making sure the 14 lead cell monitoring connector was disconnected from the BMS board I started connecting the 14 wires to the pack.
Starting with the only black thin lead on the 14pin connector to the negative side of the battery pack.
Followed by the next wire, right next to the black thin wire, which was a thin red wire. This wire measured 4.19V.

Did this for the remaining 12 red thin wires till all of the thin red wires were connected.
Then with the negative lead of my voltmeter on the thin black wire on the connector and the positive lead of my voltmeter on the third pin I read 8.4V.
I checked all the pins on the balance connector confirming they were in increments of 4.2V I then plugged in the balance lead connector to the BMS seconds later smoke started coming from the BMS board.

Where did I go wrong?

There is not much information on the sequence for connecting and disconnect BMS from the Battery Pack. Some say it does not matter others state it does. Can not get a consensus of opinion on this subject. Than you for your time. Signed Frustrated.
BTW I was criticized for asking the question in many FB groups and really never got an answer.
The board used is the YIT with nothing more than Li-ion 13S 48V BMS on the label. Also, I have contacted the factory but nothing from them.

[Sewspcl]

I love how you get so excited!! Good for you Will!!!

[rebeccaheuston]

How Cool Is That
No kidding Will
This is your signature saying
Everybody gets a kick out of it

[NikkyKnowsUNzs]

Get everyone off the grid with your knowledge, love what you are doing!Navy veteran, aviation electrician!!Please continue to teach brother!!

[nunyabusiness]

The enthusiasm is awesome. You can hear his excitement

[Nirky]

Your enthusiasm for solar is infectious.

[randycarter]

Hint for the startup process. Get a 9v battery, a SPDT toggle or push button switch, and a suitable enclosure. Wire the both negative wires to the NC of the switch. 9v positive to the NO. The BMS positive to the COM of the switch. Now you have a switch that you can flip on to start and off to run. Always ready when you need it.

[Tuckerclan]

I wish I understood everything you are talking about and maybe if I watch enough of your videos, I will. I have to admit what keeps me interested is your true excitement of the process. Keep these coming and I'll get it all sooner or later.

[Colaaah]

@DIY Solar Power with Will Prowse
Col here, hi Will, longtime follower here. I've learnt alot while you have been expanding your knowledge here on your channel, You are doing a great service here mate. I love how you continue to keep it real :)
Is there any chance you could do a video on all of the Pros and Con's on setting up a
'DIY set up using lifepo4 12, 24, or 48Volt set up?!?!'
(Here are some example ideas of some subtopics that may fall under this category?! Please elaborate on each topic and add more topics that you believe are relevant, as I am sure you would have some, these are just some potential examples).
Eg:
For home or RV set up (And depending on the size of your RV, and/or how many watts from the number of panels on your roof and/or free-standing Solar on the ground)...
And depending on how power-hungry ones rigs (RV) is?!
Wire sizes needed to be used?!
Power drop over the length of cables between Solar Panels to your Charge Controler?!
Best Charge Controler for the DIY'er depending on the way the battery bank is configured (Including value for money controller that does all you want from it, including B/Tooth and Temp cut off...) To list some on this subject, but definitely not limited to...


I hope we hear from you soon Will, keep up the great unbiased work you are doing. You can tell you get a kick out of doing all of this, as do I learning about it at and have done some small set-ups and in roughly a year I will be doing a much larger set-up on a Fifth-Wheeler and travelling Australia full-time and homeschooling our 2 boy's in the process. We will be free camping it all that we are able (You call it Boondocking over there), so we want to be as self-sufficient as possible. And it will all be done by me. Lucky as a qualified builder, I have learnt a lot about Electrical work and also have done quite a bit of electrical works, I even have a novice level of understanding of electrical circuitry and the components names and what they do etc...I'm able to do my own soldering etc. too.
Cheers, Will.


Please hit the 'Like' button on this topic if you would like Will to do a comprehensive video on this topic???

[TerrydeAlaska]

Great to see you paying more attention to safety and letting your viewing audience know how very important it is

[stevek]

I’m liking the PPE and insulated tools! While melted tools makes for a good story, as you said it makes for a bad day! Also kudos for additional safety precautions. Oh, and content was great too. :)

[janekw.]

I actually have two of them and have one of them powering a big 400A relay so no problem with the power output ;) charging is done over the BMS.
Discharging is bypassing the BMS over the relay directly to the battery so all funktions still work and you just can by the cheapest version and still be fine as long your charging current isn't to high ;)

[robertwilcox]

Sweet!!! I'm ordering one for my 48v Nissan Leaf RV setup. From your description and testing, I think it should be perfect. I have been running without a BMS for a year, nervously. I haven't stressed the setup, slow charge/discharge, and the cells have stayed in balance....but now I'll be able to sleep better. Thanks Will. You're the best!!