12v 60a LiFePO4 Solar Battery BMS for $32- Installation and Test! 

0:16 - 1:45 How to Build it 1:46 60 amp Load Test 3:41 Over Current Test 4:45 Over Voltage Test 6:56 Over Discharge Test 8:44 Conclusion and Things to think about when choosing a BMS for your system ~~~~~~~~~~~~~~~~~~~~~~~~~~~ Does off-grid solar confuse you? Check out my DIY friendly website for solar system packages and product recommendations, and so much more! www.mobile-solarpower.com Join our DIY solar community! #1 largest solar forum on the internet for beginners and professionals alike: www.diysolarforum.com Check out my best-selling, beginner-friendly 12V off-grid solar book (affiliate link): amzn.to/2Aj4dX4 If DIY is not for you, but you love solar and need an offgrid system, check out Tesla Solar. Low prices and great warranty, and they can take your entire house offgrid with their new Powerwalls: ts.la/william57509 ~~~~~~~~~~~~~~~~~~~~~~~~~ My solar equipment recommendations (Constantly updated! Check here first): 12V/48V Lithium Batteries: www.mobile-solarpower.com/solar-batteries.html Solar System Component Directory: www.mobile-solarpower.com/solarcomponents.html Plug-N-Play Systems: www.mobile-solarpower.com/full-size-systems.html Complete 48V System Kits: www.mobile-solarpower.com/complete-48v-solar-kits.html DIY Friendly Air Conditioner/ Heat Pumps: www.mobile-solarpower.com/solar-friendly-air-conditioners.html Complete 48V System Blueprint: www.mobile-solarpower.com/48v-complete-system-blueprint.html ~~~~~~~~~~~~~~~~~~~~~~~~~~ My Favorite Online Stores for DIY Solar and Coupon Codes: -Current Connected: SOK, Victron and High Quality Components. Best prices and warranty around: currentconnected.com/?ref=wp -Signature Solar: Cheap Server Rack Batteries and Large Solar Panels: www.signaturesolar.com/?ref=h-cvbzfahsek -Ecoflow Delta Official Site: My favorite plug-n-play solar generator: us.ecoflow.com/?aff=7 -AmpereTime: Cheapest 12V batteries around: amperetime.com/products/ampere-time-12v-100ah-lithium-lifepo4-battery?ref=h-cvbzfahsek -Rich Solar: Mega site and cheaper prices than renogy! Check them out: richsolar.com/?ref=h-cvbzfahsek -Shop Solar Kits: Huge site with every solar kit you can imagine! Check it out: shopsolarkits.com/?ref=will-p -Battery Hookup: Cheap cell deals bit.ly/2mIxSqt 10% off code: diysolar -Watts 24/7: Best deals on all-in-one solar power systems, with customer support and distribution here in the USA: watts247.com/?wpam_id=3 ~~~~~~~~~~~~~~~~~~~~~~~~~~~ Contact Information: I am NOT available for personal solar system consult! If you wish to contact me, this is my direct email: williamprowsediysolar@gmail.com Join the forum at diysolarforum.com/ if you wish to hang out with myself and others and talk about solar 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

I'm a 56 year old grandmother and find your videos and book on solar the easiest to understand I'm getting ready for my first build going to use it in my day tripper van.

If I had to pick out a favorite video, it'd be this one. I think it's because you did your usual teaching and also included a little experiment.. That was interesting.

I learned a lot from this video; a well done hands-on practical demonstration of what you have been teaching us.

You have a great channel and website. No BS, straight to the point with a wealth of info, and a great personality backing it all up. I'm stil hoping for a vid on adapting van/rv system to charge at a tesla and ev station. :)

You are SO interesting to watch! You are an incredible teacher...very talented at explaining complex systems. Thanks for your videos.

I’ve watched your videos so many times, every solar forum I read I end up reading in your voice 😂 thanks for explaining things so well you’re now the default battery/solar voice in my brain

Always love your videos. Your are my go to guy for anything solar and I really appreciate you unbiased testing of everything. I learn something new everytime.... keep em coming....

He was doing these types of vids in a RV and killing it. Now he's in a house, doing the same, rolling a Tesla, tearing open batteries and solar geneators. He just needed more room.

Thank You love to watch and learn from you.

You have become my primary source for updating my knowledge of PV systems. In the 80s I ran a solar thermal research and manufacturing company. Question. What was the monitor you attached in parallel with the BMS. Simpler than app and bluetooth connection for a quick look. Keep up the good work. I think you've found your calling.

I actually like all of your videos before I even watch them at this point. Thanks Will! I know I can count on you to accurately test hardware!

Good stuff. Always like to see testing of less expensive equipment. Good way to separate the wheat from the chaff.

great explanation! You're an excellent teacher!

Thank you for your review Will. I purchased a battery box built to hold a trolling motor battery and have been looking for a the proper device for battery protection. (4s 100a LiFePo4 Winston) Thanks to your video, I have found it. Already purchased and delivered. Can't wait to hook it up and test.

I imagine you get a ton of questions from people delving into this area but hoped you could enlighten me if you have time. I created a 3S24P 18650 battery to be used as a driveway wall lamp. I used a Daly 20A BMS but did not realize it was either that small nor using a non-standard BMS cable. As a result and in line with one of your other videos where you stated no negative repercussions exist for hooking multiple BMSs to a battery, I added a second 3S BMS cable. Attaching the first to the B0 (most negative) and on the positive side of each series set each subsequent cable (B1-B3 , Matching the Daly only ensuring I used separate a separate location on the nickel plated fuse sheets). Once complete I tested voltages reflecting a 4v jump per connection telling me it was connected properly. I then attempted to use the BG-8S attached to the newly created battery but it never powers on the unit. I assumed maybe the device was faulty and tested a prefab 3S commercial battery and it powered on properly and showed the state of each cell. What else could I be missing as I have run out of options. Sorry for the lengthy post but I wanted to be as concise as possible. Thank you for your time and your videos I find them very helpful.

Will, you're an information beast! ty for the great videos and information.

I also just purchased your book. Awesome. Thank you for you solar videos. I will be adding more to my RV

Another fine video. You’re the best. Thank you very much.

Great video, as always! You are the best guide ever

Will, Are you charging through the BMS with the shore power or the solar? Thanks for education. Enjoy all your videos.

I was recently looking for a 50A 4s LifePO4 BMS and I saw these on Amazon, if I remember correctly. I never buy into waterproofing claims when it comes to PCBs. I steered away from these BMS because it made no sense to waterproof the BMS as all it does is cover it up and remove the BMS from the heat sink (in this case the ambient air). The case will cause the BMS to heat up abnormally high as the heat can't be adequately dissipated by into the air. Another item to clarify for the audience is that not all BMS have a balancing function. There is no point in balancing during discharge (with a non-regenerative balancer) and especially with LiFePO4 cells (as the cells will remain within a narrow range between 3.2V and 3.4V for a large portion of charge-discharge cycle) as all it does is reduce the useable energy of the battery; that is why most cheap BMS that have balancing function begin top balancing only when the individual cell voltage reaches 3.6V.

Nice series Will! I just binged most of them and my head is full. On this BMS, I didn't catch whether it has a Low Temp Cut-Off. Do they all? Thanks.

top notch work again our Will

Thanks for the test, I have Winston LiFePo4 batteries, charged at -18 ° celsius in winter, no problem for 6 years!

Another great video Will thank you so much for your time for your effort we love you God bless

Thanks...just picked up one of these to use on an old 16S ebike Headway pack, to be repurposed as a 4S4P trolling motor battery. Should be straightforward.

You Are Getting Good At Teaching Us Your Craft! Nice Video! Keep Up The Good Work! Lithium Ion And Solar Are The Wave Of The Future For Prepping And Camping. Next Step Is Like Hybrid Solar For Northern Residential! I Think That Is The Next Step For A Viable Hybrid Solar/Inverter Propane Gas Generator System, You Know For Cloudy Rainy Northwest Climits. And Long Winter Nights! Again Great Video!

Great video (a year later), do you know what BMS could enable a lithium battery pack to work as a Lead Acid drop-in replacement?

Got a tempeture gun to point at the wires and connections more scientific and thermal imaging is fun stuff

Very useful video, thank you. If you’re building a battery with new cells and a bms like this one. Do you need to bottom balance the cells like you would on used cells or just let the bms do the job?

Thanks for another well done informative video !

Just found your videos, great stuff, explained where someone can understand it. I want to connect my 12v 60ah Lifepo4 to my RV instead of Lead acid, is this BMS safe enough just to leave charging through the RV system? Would you recommend any other safeguards? No Solar at the moment but am planning in the future. Randy

Great information thanks for all you do, Do you have any videos showing how to program the MT50 to a deep cycle battery?

Hi, i have a question for you. i have 2 identical li-ion battery back, each one have it's own bms that can handle 40A. Can i connect the 2 pack in parallel to have a 80A total output? Will it work or i will have problems?

Thanks lots of great info👍 Have you done a review on that MPPT charge controller in this video with the low temp protection? Just saw it on Amazon.

LOL....I was born and raised in San Diego. Never say never about the cold friend. I remember back in 87 when we got 3 inches of snow in the Santee/Lakeside area. I remember Ice floating by the OB Pier in 83. North Island Bridge Frosting over in 86. Also, remember that California actually gets more annual snowfall than Colorado ;) Better to be safe than sorry, for a just a few dollars more the system can be protected from cold/heat (You teach this) and it may well be an unexpected benefit from time to time :D Great info...would be curious how it performs 6 months to a year from now.

Thanks for the video! Is there a version of this for a 400ah sinopopy bank with 2000w inverter and corresponding loads? I need low temp charge cutoff protection too! Trying to work with an existing setup that doesn’t currently have any BMS installed. Thanks!

It’s great to watch your videos. What is the small panel that you use to check the balancing ?

Thanks and excellent video. What is the amp hour for your battery?

"this Is when science is fun" legend

Hi Will, Great video 👍 Do you think it's possible to build batteries with these BMS on each battery and then parallel these batteries together to increase capacity?

Hello, first of all thank you for your sharing and your different test, I also bought the same bms version 15A. It cuts well at 2.5 volts but it reacts to 2.51 volts and not 3 volts as in the description, so it cuts and reactivates the charge (a bulb for example) without stopping. Do you have this same phenomenon ?? Thank you Have a good day Benoit

Hi Will, Thanks big time for all your videos! You have truly given me an education on Lithium Ion Batteries. I recently tore apart a 12V 100AH battery to reconfigured the cells into a slim battery. I numbered all the wires of the BMS and reconnected them exactly the way they were. When I measure the voltage at the battery terminals I get 13.5 volts. When I measure using the + battery terminal and the - BMS wire I get 2.4 volts. Could use some HELP ! Thanks! Don

Great video as always!!!

Aw3some video Will very informative and like when you get excited when you give tips and learning at the same time. 😀👍Be cool!

Can you please tell me where I can find the settings to this specific mppt for lifepo4. I have CALB 100AH batteries. Thanks.

Got one of these a few weeks ago and didn't know it did any sort of active balancing til the other day. Never charged it up to 3.6v per cell for any balancing to take place (my assumption), but a week later of monitoring the new battery pack I find that the cells are 0.004 max difference. These metallic red covered BMS/balancers are great. I just finished building a clone of that battery pack tonight but used an HX-4S-F100A, which I'm now totally regretting.

For some reasons I can't see the video but the sound is clear. Other RU-vid videos are viewable.

Whats the difference between common version or separate version BMS

Hi! I have a question I wanted to ask, if we are using the BMS then do we have to worry about balancing them at low voltage or connecting them parallel? because anyway each cell gonna get disconnected from the load at their set voltage right?

I see your channel's name is "DIY Solar Power with Will Prowse"...have you considered other Solar Power Energy Harnessing Applications? Such as Solar Ovens ? Solar Water Heaters, etc. and also maybe some Physics behind Solar Power for those that are interested in the Science behind Solar Energy. Lastly maybe some predictions as to your thoughts on the future and where Solar Power / Batteries are headed. like in Graphene Batteries etc.... no Doubt Solar Energy Harnessing is our future, the path that we take going down that road is yet another matter entirely...thnxx for the info, you are quickly becoming the Solar Energy Source on RU-vid....

Have you considered adding a FLIR type infrared thermography camera to your test kit? I ask because while all of your electrical data are gathered precisely, but your thermal data is gathered by touching components. Even a cheap IOS or android thermography camera will give you and your audience a much more accurate data set than your fingers. You'll be able to analyze the entire system thermally all at once with an image / video that looks super cool (so to speak) Anyway, great channel and great reviews. Keep up the good work!

Was pretty amazing :D .I like your videos because I learn more every day . Just RU-vid keeps un subscribing me from channels. An idk why .

Will, you need an infrared thermometer so you can show us how warm the components get.

Hi Thanks for the video about this. After a few months is it still working well? Any update? Thanks

Hi, Will. Have you experienced a BMS low voltage disconnect and then the BMS won't reconnect when cell voltages recover? I'm using the Delgreen 4S 100A PCM/PCB/BMS. Thank you.

hi will just one question can i use one 12volt battery and 4 buck converter to charge 4 lithium cells individually with them connected in series with no need for bms

Hi. Thanks for the videos. If I want to connect that bms battery pack in parallel with another identical bms battery pack to get 80 amps. Do I need an extra BMS that manage these 2 ones? Or the BMS are only for series systems?

What happens after over current protection kicks in? Does it take a few seconds and then turn back on??

Very good video. Bravo!

if I am not wrong, I guess it work fine without the charge controller. using the solar PV panel connected to one dc-dc regulator CC CV and feed the battery (to charge it). and the load discharge direct from the battery.

Will, I am using these on 40 Toshiba LTO SCIB batteries using 24S because I don't have to worry about low temperatures. I initially started with 15 batteries and Daly BMS'S I purchased direct from Daly and they were shipped to me in 8 days. Very fast shipping from China. I just ordered 25 more a month ago and got them in 7 days. The initial 15 have worked flawlessly in keeping the cells balanced. I can see no reason to use any other brand for LTO batteries.

Hi there nice video but could u use a battery tester to see how many cold cranking amps , your battery delivers, I was just wondering like how much cranking amps can this battery deliver

Will, where did you get the terminals you crimped to the BMS to be able to attached to the battery terminals ?

Hello, Great videos I have watched most of them. I actually was looking for a new BMS and found this one online and thought about it. I have just bought some Miady 36ah batteries and was thinking the BMS needs an upgrade. Currently, they just have a tiny little non-heatsinked one that sells for about $4. Would be great to see maybe a video taking the cheap Miady cells and replacing the BMS or combining them in a new box with a new BMS.

thanks for this great tutorial, i know there is a difference between chargers for Li-ion and LiFePo, so my question: is there a difference between bms for the Li-ion and LiFePo batteries ???

Wonderful video!

When you are doing your initial connection to the Inverter what size ceramic resistor are you using? Thanks, been enjoying your videos.

I assume the leads from the MPPT controller goes directly on the battery? The P1 line from the BMS goes to the neg on the inverter and the pos from the inverter goes on positive terminal on the battery right?

I have wondered about the BMS, disconnecting from the controller, I thought about putting a resistor bypassing the BMS to controller, like 100watt, 10 ohm or something, just enough to keep some power on the controller, but in most cases, the controller is cheaper than the battery, and your house, if it is burned from over charged lithium batteries,

Dear will I'm purchaseing a travel trailer that I'm building can I pay cash you to set up my electrical stuff when I'm done building? Thanks..

Will thanks for your efforts in getting all of us on board. Question I have set up a 4s12V Daly BMS on 4 -280Ah cells. BMS will not let the attached inverter function. Do I need to “jump start” the BMS with a short burst of charge current from a 12V charger?

I just purchased two 80 A and it comes equipped with fan and BT temperature sensor.

Hi Will, I love watching your videos, you make it fun to learn. I'm planning to build a battery with Lithium Polymer 3,7 volts cells (4 in series), they are rated 300 watts each. First question; what kind of power (amp hour) would that give me ? And second question; could I use this BMS 12 v 60 amp for that type of cells? I'm planning to connect an inverter for a 1500 watts induction stove. If this is too small, is there a stronger one that you would recommend ? Thanks.

Thanks for another great video Will, do you think this BMS is safe enough for standalone use - or would you recommend a victron battery protect as an additional safety measure? My charging source will be my alternator using the 20A renogy DC to DC you reviewed, I presume this will do a good job to prevent overcharging as well

thanks very much you number one you numero uno terrific videos

I am running two 24 volt LiFePo4 battery banks with two 320amp BMS’. We have it up and running. The only thing of concern is on the Ant BMS app one bank shows different SOC than the other. Like 93% and other bank might show like 26% or 37% SOC. Both banks showing around same voltage. I’m running solar charging. System seems to operating ok. Don

Hi, do you think if I make 12v blocks of li-ion cells and use one BMS to each 12v block, i can connect the blocks (+bms) in series, it would work?

Nice vid's but what amperage can it charge at? Looking to be able to charge a lith bat at 50 amps

Does Low temperature detection matter with other Lipo’ s or only LiFePO4 ?

Excellent . always watching your videos .. hare learning much more then other links . Base in LANGKAWI MALAYSIA

Re: BMS choices: QUESTION: Is that a common pole BMS, or A separate pole BMS. I like the idea of this way of protecting battery as I study more for my 1st ever DIY 24v LifePO4 project. I need to study my BMS options a little more before purchase that part. I think I will go with the Daly brand S8 ...8 connection to each 3.2v battery cell.

If I wish to utilize ONLY the over/under voltage cutoff of this BMS, do all the balance wires need to be attached or just the neg and 4th cell positive??

Graet video! what voltage does the battery have after charging, i have lifepo4 4s, 3.2v 100ah, after charging the battery is 13.4v. Thanks

tanks for this video! it almost what I wanna do to changing my offgrid system. but I have some questions: 1. the charge controller are 12/24V and don't goes mad trying to guess with the 2 wires BMS? tracer empever manual say first battery then solar panels. 2. maybe a better option is the BMS with 3 wires. common, charge from mppt and discharge batteries. my guess is the 2 wires BMS is right to electric bikes. they only charge or discharge using it. 3. connect inverter direct to the battery work fine IF have some protection for over discharge. manufacturers love to stop em at 10.5 to dristroy the battery before disconnect. 4. I don't need any protection for zero degree. never happen here in tropics :D 5. afer some months everything gos on fire or still working nice ? keep learning, testing and increasing your evolution. it's the way in life!

Will could you link your schumacher shore charger you're using to charge your custom lithium battery?

been watching a lot of your vids, if i build 2 sets of 12 volt battery's using 4-3.2 volt cells, could i charge 2 of these with one 4s 60 amp bms or do i have to disconnect one pack and hook it up to the other pack, or can they be charged together some how as one large pack

In short. What do you think is the future? Solar is great. Ultra capacitors are really cool. Very cool. Make a bit of money. You are the future. Thanks, man 😁

IMPORTANT QUESTION: I like that BMS Daly you show. looks like heavy duty. So I used link and they said Common Port and Separate Port. Which one are you using and what is the different ? Thanks very much ! Looks forward to your answer so I can buy right one. Question 2: Do you think the BMS 100 Amp Black and blue wire is bigger Than the 60-80 Amp BMS ? because I want to make 12v with that LifePo4 3.2v 50amp Blue batteries. Want to start the Honda Odyssey minivan v6 3.6L or Toyota Camry v6. Thanks

Will, it seems to me that the batt. bank you built could output way more than 60 amps. Let's say you wanted to run a larger device (say that heat gun at 120 amps). Could you use a larger BMS to run it? I suppose if you did this too long or too often, the battery would degrade, but what do you think for occasional short time use - say 10 minutes at a time?

Did the BMS really stop the overdischarge or did the inverter low voltage protection turn off the inverter?

So does the total battery current go through the BMS? So I am assume this particular BMS can't handle large surge currents like in a golf cart or some sort of motorized device?

I only have two batteries can this be connected without using the other leads or do i have to get two more cells?

Have you got any vid on how to wire to 2 battery banks with bms

Where did you get the little meter that monitors the voltages at is charges up?

where do you usually connect the negative side of the inventer? is it before bms or directly to the battery terminal?

Hey, buddy, I'm a little confused as to using 2 balancers - one is (the red one) attached to the battery wall, and another one is the display monitoring each individual cell (the black one). Can the black one be used instead of the red one or do they perform differnt functions and are used for different purposes? Or are they the same except for the black one simply has a display for visual monitoring?

Hi will, i have had several inverters blow up on me recently, the reason being my bms cuts off before my panels and my controller spikes up to 24 volts when my battery cuts off. My inverter is only 12v. Any suggestion for a 14v cutoff for my inverter?

Can I connect the BMS in series? I have 4 packs of battery rated in 12v 3S with BMS installed. I just wondering If I can connect the two battery pack in series and parrallel the two also. To make system 24v 6S.