Correction: At the end of the video I was referring to Wh/€ and not kWh/€. Sorry.

Those are some oversized Legos you've got there. Great video as usual.

_"After measuring the dimensions of my battery pack, I choose a slightly oversized electrical cabinet"_ Pick nearly 3 times the size of the battery. Joke aside, this is a really well thought solution. Just a small tip: when pronouncing part number, use dash instead of minus. Makes more sense.

I just dropped by to thank you for being my teacher during my journey into the world of engineering! ^^ I've learned a lot from your videos! =)

That's another great video. I would be putting the temperature sensors in between the batteries though as the ones in the middle will get hotter. I'd also drill a small hole in the bottom of the cabinet as a vent for gas build up and also as a moisture drain. I think you've convinced me to make one myself though!

Good build, but it would be wise to drill a small 3-4 millimeter hole in the bottom of that enclosure, if it doesn't have one already Waterproof it may be, but vapor can get through far smaller holes, and then condense inside, at which point it can't escape the waterproof enclosure, especially with the daily thermal cycling in an unheated area like a garage. Plenty of electrician type people suggest doing that (Big Clive for example) - it's not uncommon to find a seemingly perfectly sealed box resembling a fishtank. It doesn't really compromise the waterproofness - water drips/rains from above, and it lets any water that does condense drain out of the box. Doubly so because it's filled with batteries- LiFePO4 might not be as prone to catching fire as other chemistries, but in the event of a catastrophic short it's still going to heat up and vent gas, at which point the pressure inside a sealed enclosure could build to dangerous levels/blow up, a little hole would allow the vented gas to dissipate more safely

Energy created? Dude, I'm high and GreatScott just broke THAT Rule! This is awesome! You gotta be friends with GreatChuckNorris.

Rated charge/discharge Cycles of LiFePO4 are much more than Li-Ion. So you made a good choice.

Thanks so much for finding that BMS manufacturer, I was scared to use the one I found on eBay for protecting my high power battery.

Hi Great Scott! I've used an earlier version of these cells before, they absolutely need mechanical constraints, otherwise they bulge over time and cell DCR increases. Highly suggest sturdy end plates and either two straps or long bolts to keep the batteries from expanding. Topologically they are very similar to polymer 'pouch' cells internally.

Good project as always. A little tip I picked up a few years ago regarding getting roll plugs into a wall: put a screw in a couple of turns then hammer the screw end. This saves accidentally ruining the plastic roll plug.

Hi! Great project! I think you should use li-titanate battery (LTO) to be able charge at low temperatures. I used toshiba SCiB cells for a similar project. P.S. Make sure there is no direct contact of copper and aluminum at the terminals.

Seeing that exposed wire between the 2 pieces of conduit made skin crawl.

Nice! I think you can put the thermistors in between cells 1-2 and 3-4 (there seems to be a 2..3mm gap). This way you sense all 4 cells and also sense the hottest part (the core). Regards!

Thanks for this video. I think that it is a great project to undertake. I provide power in my garage using old APC UPS units. I cut down the main board in the UPS, isolating the charging circuits and the mains input. I replace the charging circuit with the solar charging circuit from my solar panel controller and placed a switch circuit in front of inverter. My solar panels charge the batteries inside the UPS and 4 other batteries that I have hooked up to provide the 24 volts the inverter uses. It was a simple system to build and it allows me to run my grinder and drill press along with all of the lighting in the garage. I tried replacing the lead acid batteries with battery banks made from recovered 18650 batteries from old laptops. The systems work well with these batteries but I have far more lead acid batteries than 18650 banks. I think I will try LiFePO4 batteries in my next UPS rebuild.

Thank you SO much for this information. I did not know this particular quality BMS existed. It is just what I need for my project.

Interesting project. I thought about adding a backup energy source to my hone and now leaning towards a solution like this.

Hey Scott, thanks for your interesting Video! I was also interested in this Winston LiFePOs. So I know some about them. It is absolutely necessary to strap the cells together for example with threaded bars to prevent them from bending. Also you forget the initial balance charging. Normaly you should connect all 4 in parallel and charge them to 3,7 Volts until the charging current reaches 0.1a or less. Subsequently you should store them in parallel for about 24h. But you did a great job. Thanks for the interesting project.

When your charging your 6S3P power bank when the video gets uploaded. That's for the wonderful content once again!!

I make lithium battery packs. You get a thumbs up from me for doing a good job designing and building this power wall.

Your garage has more tech than my whole house :D

LiFePO4 is my fav battery chemistry. I have a few emergency vehicle jump start packs that use these and I use for everything except jump starting my car. They make awesome power supplies.

Thank you for doing this, much cheaper than most. I'll be doing something like this someday.

Fantastic info and build, thank you for your time making these videos, much appreciated!

~ The 76 page manual was quite interesting. Such a nerd. I’m jealous.

I really liked that powerfull outro :) I will see you next time!

Heck yeah! Finally clearing my suspicions :D

after watching your videos for a while, i trust you with being able to make this and giving us good instructions to replicate the safety of it. im hoping to apply it to the home i hope to eventually build, with generators and other home made circuits.

I added a tiny controlled heater in my LiFePO battery box that keeps the temperature over the -5 degrees minimum temperature.

Interesting the LiFeYPO4! Nice video as usual :)

its great to listen to this detailed explanation even tho im not quite a listener

Great video! Very helpful throughout the whole process, very well explained. And a very cool and useful DIY project!

I am sure Jehu Garcia would be very happy to watch his German counterpart 😆

I was the guy asking for this project, so thanks a lot!!!!!!?

As always, well explained step by step explanations. Great video!

Mann, ich wünsche wir hätten mal im Winter so viel Schnee und Kälte :)

500euros is too much but 460 isnt xD

Please mind changing those A2-70 stainless bolts on the poles of the batteries. Stainless has a very bad behaviour - not only it has a bad temperature and power conductivity, but also it promotes the so called contact corrosion (So the copper bridges will corrode way faster). I'd recommend to change those with copper bolts.

Nice system. I love messing around with prismatic lithium cells. I find that those particular cells like an absorption closer to 3.5 volts/cell for prolonged lifespan

Finally. Now complete the drone. Good video as always, keep up the nice work.

Great video as always. Perhaps you could look into lithium titanate (LTO) batteries as well.

I didn't know you where living on the Zugspitze ;)

This was a great video, very inspiring! Thanks for making it!

I made a BMS with a TI BQ-IC and some extra components for about 60$ - plus board. From Texas there is BQ Studio with which you can easily set everything up.

I don't suppose that You live on top of Zugspitze :D

see you NEXT TIME!

super great video info and analysis from absolutely the best channel on utube thank you keep up the good work

Stunning bud. Thanks for the info.

3:00 Wusste gar nicht dass deine Garage auf der Zugspitze steht :D

Its worth saying that technically all chargeable lithium cells is lithium-ion.. that would include LFP and LTO batteries ... But LFP and LTO is usually specified due to they not complying to the standard voltage of other lithium batteries. For lithium carbon there is really four common types. LMO that is very safe, but other vice not special. LCO that have a lot of charge cycle, but other vice not special. NMC that is pretty much a combination of LMO and LCO, having both advantages, but a slightly lower capacity and NCA that is a variant of LCO with doped with aluminum to gain additional capacity (about 30%), but loses cycles.. Tesla original roadster uses both LCO and NCO batteries... that is some cars have one variant, some cars have a other. All newer tesla cars have NCA battery only. That is why the 85kWh Tesla S and the 54kWh Tesla Roadster have about the same number of cells, despite the S modell having quite a bit more capacity. Now there use to be two powerwalls. A 7kWh and a 10kWh modell. They had the same number of sells. The 7kWh modell supose to have NMC cells and the 10kWh modell suppose to have NCA batteries. The NCA modell magically vanished from the market. The reason is probobly because it simply didn´t last. The 14kWh power wall is simply a 7kWh modell with 4 pack of cells in steed of 2, using NMC only. When tesla used 18650 cells they packaged them in packages of 5kWh each. Now they use a other system to pack the cells more densly. Anyway this is fairly important, because NCA batteries usually just do about 700 cycles. (20-80% full capacity equivalent), LCO does about 1200 NCO dues about 2000 and LFP does about 3000.. LFP is also much more resilient to deep discharge and overcharging, that NMC is not. LTO is claimed to do 7000 cycles Nissan leaf gen 1 used LCO batteries, but in Gen 2 they swiched to NMC increasing the lifespan from 1200 to 2000 cycles, simultaneously increasing the capacity from 24 to 40kWh, same time increasing the life span of the battery with almost 3 times. My point is... most 18650 cells look identical.. but how they work is quite different.

Top Video alles gut Erklärt und Interessant.. BMS hätte ich auch noch nen extra Gehäuse verpasst auf jeden Fall Daumen hoch..

*Another amazing video!* *I really appreciate your work!*

Now it's official: Great Scott hates pipe fittings. :D

9:05 "But it also surfills all kinds of safety standards" Yeah, but the marked "safety standards" are only model numbers of other enclosures :D

Great work, dear Great Scott!

We would expected the DIY way👍 Thanks for sharing😀👍

9:32 I seriously thought he was sawing through his finger for a second there.

I would like to use this battery in a motorhome. What is the correct way to charge this type of battery with the engine alternator?

Love the measuring tape

video quality and sound quality are awasome .

now iam early here GREAT video amazing can you do a video on class d amplifier working if possible Thanks in advance

Next Mppt charge controller Diy Or Buy

Great Scott , this is awesome , I'm sure this will provide a suitable auxiliary power source for a pc should a power outage ever strike , thank you for the video

As usual great work congraturations

I hope you 3D print a case for that bms. Kinda worrying it just taped on the side of the battery

As a real electrician, watching some of these installions hurt my soul. Nice Rittal cabinet, those aren't cheap...

awesome scott i enjoy watching your videos the greatest diy master

Very informative video. Especially with the prices. A lot of ppl do not provide prices. Good

Great Video! I´m searching for a 2kw powerwall system that could supply my house. But the monetary return it´s almost impossible with the prices in Europe. Solar panels aren´t expensive, but inverter + charge controller and batteries, are a lot of money. Thanks.

Should have mentioned in the calculation that the usable capacity of lead acid batteries (especially at high discharge rates) is only 30-50%

Great video Scott!

Really awesome work, dude! 😃 I think about making something like that for a long time!

Power Brick Power Wall Power House *Power Bank*

WARNING!!! it is true you can DISCHARGE LiFePO4 batteries in cold weather... But NEVER charge below 0C.... Permanent damage to the cell will occur. Make sure your bms has a thermal cutoff

Guter Wortschatz - schöner Film!

Great job, something like this would of taken me a long time to finish. I don't know how to complete these projects in a week.

7:33 - „bomb has been planted“

- 20° in deutschland? Auf der zugspitze aber ich denke nicht das du da oben wohnst

Thank you. I was thinking of making one 🔋🔌

Great Scott !! Great explained Great Video!!!

cycle live is wayyyy better than tesla. Up to 30000 and liio only 1000 edit: the above is wrong! I confused lithium ion phosphate (the one in the video) with lithium titanate. lithium titanate has very long cycle live (up to 30000 until the capacity goes under 80%). lithium ion phosphate is still longer lived than classic liion but only up to 3000 cycles.

9:42 those SPEAKER CABLES are not up to code and WILL burn like a candle wick

LiFePo4 FOR THE WAY! Great choice!

The intro is so fire.

Stop overhighliting >

134 pcs Samsung INR 18650 25R = 335 euro at nkon.nl ..just sayin..

Awesome project! I really enjoy it.

klasse video, klasse projekt. Bleibt am ball!

500 EUR to run some lights in the garage. 14 EUR for a 50m power cord to the house... Ha!

More batterie Videos please i am really into that stuff and love your videos about that topic

Thanks for sharing all your knowledge in your brain database :)

Not sure about in Germany, but in the US your best bang per buck are golf cart batteries. Cheap, lots of deep cycle power, and they last 8+ years if you take good care of them. Energy density, IMO, doesnt matter much for stationary solutions.

I was literally just looking at similar products from Goal Zero, and having the same thoughts re: cost and features.

Thanks! Extremely interesting and informative.

Winston cells will slightly bloat if you don't strap them together well with something strong. When this happens without them being straped together it's only the terminal connectors holding the battery together. The terminals will get mechanical stress on them bending them slightly causing damage to the inside connections from the terminal to the cells inside.

Brilliantly explained ty

Good info! Thanks for sharing this information !!

Good pick to get a BMS with temperature sensing, at the minimum it'll ensure safer charging conditions for the batteries and you may get the added benefit of increased cycle life by charging closer to room temp.

This was awesome. Thank you

Love watching your videos, and though my knowledge in electronics is quite basic, I do learn a lot from you. Can you make a video about how to make a good quality car booster (jumper)? I have a dead car battery and have no ability to start a car. Thanks