Im building a 72v Powerwall using the LGMH1 Battery Packs

Scooter Packs : j35.us/MH1-SALE
2Kw 220v Inverter : s.click.aliexpress.com/e/FKV1usqy
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FAQ:
1) Where can learn more about batteries? j35.us/DIYlithiumBatteryBook
2) Where can I buy Lithium Batteries kit.co/jehu/lithium-battery-c...
4) Where Can I buy Solar Panels? Flexible - j35.us/136wFlexSolarPanl
Glass - j35.us/100w-100-solar
DIY - j35.us/DIY-Solar-cells
5) Where can I buy a Battery Management System? kit.co/jehu/battery-managemen...
6) What parts do you use on your Samba? kit.co/jehu/the-electric-samb...
7) Why not use Supercapacitors?
A. Batteries work better at this time, caps are rare and expensive devices that are very good at doing things not needed for storage systems typically.
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[@laymanengineer7502]

Hey Jehu, love the channel! Long time viewer. I'm a 20 year electrician. The heat you're seeing might be because of insufficient wire size. Baseline rule: 14 awg = 15amp 12 awg = 20amp 10 awg = 30amp 8 awg = 50amp 6 awg = 60amp 4 awg = 75amp 2 awg = 90amp 1 awg = 100amp Also relative to max load only being no more than 80% of awg rating. Also with DC, the square wave doesnt travel as far so it's good to go up a gauge from rated max load size. So I would wire that setup with no less than 8 awg. Also, on the AC side, i doubt your getting proper current for 220v out of that extention chord unless it's a 10awg chord. I would check the max amperage rating on your lift. I do realize this was just a test btw. Thanks for posting these types of tests for many years now. You have tought me so much over the years about battery chemistry

[@stevebabiak6997]

Those are good numbers with respect to limiting conductor overheating. Depending on wire length, and the voltage being supplied and the current being drawn, and the ventilation available to the conductors, heavier wiring might be called for. Especially if lower voltages are involved with same overall power level (so currents that flow would be higher than with a higher voltage), where the voltage drop of the conductors starts to become a significant percentage of that lower voltage. That’s a big part of why lots of the battery powered tools and equipment are starting at 40V DC or more.

[@laymanengineer7502]

@@stevebabiak6997 yes, my reference was to free air conductors. Not in conduit. Also as a power wall with wires not more than about 4 ft. Also based on achieving about 80 volts as he said

[@laymanengineer7502]

@Brock Obama yes, in undersized conductors, heat is wasted energy. With better conductors, He would have achieved higher voltage (less volt sag) which translates into lower amperage under load. I think 8 awg would have been sufficient as he was only pulling about 32 amps

[@peter.themar]

I have a similar setup for couple months. I use two 10s automotive lithium-ion batterys in series, witch I use from 64v to 80v. These inverter has a beautiful feature - You can adjust in the menu how much current you want to draw from the battery. You can adjust low voltage turn off value, to prevent overdischarge... The inverter can continuously deliver 1800W but if it runs from the battery the power runs down to approximately 1300-1400W when voltage drop to bottom (64V in my setup). But 1400W is still good enough for transfer energy from battery to my E-UP when EVSE charger set pilot signal to 6A charging.

[@SirLaybourn]

Always seeing these amazing second hand battery options you guys have access to, and hoping we start to get better at doing something similar in europe

[@MaxGoddur]

Another item of interest concerning the amperage for gauge wire used and the posting for the current rating. If it is stranded copper it can handle more current than solid wire. FYI.

[@dr.projectx5142]

This is nice. If they can can be tethered for 8kw on the inverters that will be great and with a 11kw solar there will be 4kw left over to charge up the battery powerwall. It would be nice if these grid tie too.

[@anthony1113]

Is there an issue with running it in series through the BMS’s on the batteries?

[@chriskaye1997]

@jehugarcia - next step for power walls is some sort of water cooling (runs inverters cooler and no fans to use power or fail) 👍

[@panikrev175]

Maybe just some really good ventilation, should be enough to provide cooler airflow for the inverters, might be a good idea in case any of the cells vent, as well.

[@joshuabest100]

Hey jehu I've seen these inverters fail quite bad when pushed over 70% there is a massive fb group all about them and how to fix them

[@yolo_burrito]

Do they get tied in without the neutral?

[@joshuabest100]

@@yolo_burrito its just a standard iec c14 cable required and it plugs into either a 110v outlet or 240v outlet

[@91stantheman]

I'm wondering how these will work in limited mode on a split phase house like most in the US. You would need 2 clamps to avoid back feeding and have the software able to limit both legs individually.

[@duanemalany4809]

I can't believe you took that plastic film off and didn't show it being done.

[@It-b-Blair]

🧐 It’s just a shrink wrap sleeve.... 🤷‍♂️

[@christiana2161]

the creator of that inverter is rogel naval with a great fb group support.

[@leasttrending]

Put in a link in the description everywhere were we can get everything u have

[@glennp2288]

Very COOL.. how do u plan on doing bms ? Would also love to see another video with the electrodacus on a full powerwall.. with a automatic transfer switch..

[@arninym913]

hello do you have a link to the small current meter on the ground cable?

[@stevenc22]

Without getting the built in BMS to work, how will you every manage this powerwall? You will have a weird combination of series and parallel. You will almost have to install individual BMS on each scooter pack which will be costly.

[@jehugarcia]

Or parallel two groups and bms them all as one 20s pack

[@penrodautorepair3170]

I use four of these grid tie limiting inverters on my home. Their made by eco worthy.

[@mattwood2207]

I've been looking at these for a long time. They don't meet the UK standards but I want to understand how the intelligent current sensor works? Also if you hook batteries up to the DC inputs, would your PV input got to a charge controller > battery?

[@penrodautorepair3170]

Matt Wood we have to reword them here in the USA. What is the voltage in the uk

[@greenspider3664]

Penrod Auto Repair 230-240v ac

[@mattwood2207]

Single phase ~230v 50 Hz

[@mattwood2207]

What's the USA Ac household voltage?

[@supakat1835]

For a side experiment, does carpet burn when a battery cells have thermal runaway?

[@jehugarcia]

Don’t know, I’ve never had a battery catch fire before, and I’m pretty wreckless as you can see

[@tedonash2681]

Looking forward to see the whole Powerwall build

[@brianogram5194]

Dude, I think I have the exact same carpet here in Fresno.

[@UKMrMedical]

So I could use two of these battery’s for my scooter for 72v ?

[@Loctran23]

Looks like the two scooter pack are used with their native BMS. This would save a lot to time. Is it still true we can charge them without installing a new BMS?

[@ahaveland]

Nice test Jehu, but you didn't show the lift working!

[@jehugarcia]

I did somewhere, don’t remember where, that’s old news though let’s keep up

[@ahaveland]

@@jehugarcia I've seen nearly all of your vids - I haven't seen any of the lift working from batteries and inverter. All you showed was the power consumption which is the main thing, but showing a car actually being lifted from the energy in the scooter batteries would have been very impressive.

[@UKMrMedical]

Hey would I be able to use this on my scooter if I changed the controller to 72v?

[@Mushaz]

How much are the scooter packs?

[@jehugarcia]

No

[@KG5IZE]

dude without thought of recharge and storage could you do a 18650's to replace car battery that could take the instant drain ?

[@ahaveland]

If you want to use lithium, then only LiFePO₄ batteries have the appropriate voltage range and current supply of over 400A. With 18650s you would need hundreds of laptop cells to supply that current, and the voltage range of 3S and 4S packs don't cover the full 11-14V of a LA battery. Max for 3S is 12.6V, minimum for 4S is about 12V. You may be able to crank an engine with a fully charged 3S100P pack, but will overcharge it if the alternator runs.

[@jehugarcia]

15p of the vtc6 cells will put out 400A, but yes......

[@melomanacejr]

the aluminum case for your power wall, where did you get it made?

[@streetK4]

I'm sorry if you put 2 of these in series and 2 in parallel what would be max amp output of that setup

[@Full_Throttle_no_Brakes]

OMG I wish I could buy them here in Europe

[@UKMrMedical]

What is the ah could I use this set up on a 72v controller ? For e scooter

[@CC-hc2gi]

Where can we get this inverter?

[@Eduardo_Espinoza]

Do you still recommend that inverter?

[@richpalmisano1740]

So this is 230-240 single phase output yes? This is a European inverter...I dont think it is designed for the US power grid.

[@penrodautorepair3170]

Yes it is you cut the cord an you have 110 110 an a ground.

[@jehugarcia]

The USA has single phase 220v power

[@richpalmisano1740]

Yes. Just ignorant on how single 240 can be used.

[@dr.projectx5142]

The link doesn't work please add one that is working. Just letting you know.

[@jehugarcia]

Works fo me

[@dr.projectx5142]

@@jehugarcia tried on the mobile browser it's working. Pal.

[@dr.projectx5142]

@@jehugarcia share with the viewer about the link of the pannels that I shared with you. Same fella from Instagram.

[@jkenny1]

Did you check that the FETs on the BMS can handle the full 82V if one pack were to cut out but the other didn't?

[@jehugarcia]

Not going thru them, bypassing the dead bms for this test

[@_MrTV]

Wait did you get the BMS working on the scooter packs?

[@joshuabest100]

Nah he's probably just going off the pos and neg of the cells

[@wbetet6088]

​@@joshuabest100 I'm also curious to know is he got the BMS to work. In a previous post, he said the seller made him cut the connections, implying they didn't want the BMS to work. I want to use these packs to power electric bikes, but I would only buy it, if he can get the BMS to work. @jehugarcia did you get the BMS to work?

[@FabriDragon]

I’m not sure why he can’t use the onboard BMSs, I use 2 of these batteries on my scooter and am able to charge them both at the same time with their charge leads paralleled together.

[@FabriDragon]

Probably because if one cell failed you couldn’t tell which one, the BMS would just disable the whole pack

[@pylematthew]

FabriDragon Would you tell us what wires/connections you are charging and discharging from on these batteries? These are selling with all the wires cut. It’s not clear which wires are the charge and discharge from the BMS.

[@V4suki]

Why you use 220v, I think in USA standard is 120v?

[@laymanengineer7502]

I the US we use 120v through 1 wire single phase. Usually with appliances and equipment, we use 2 wire (split phase) 120v wire + 120v wire + neutral + safety ground = 220 - 240v range

[@dmoore5774]

Hello Jehu, How did you remove the clear gel that is on top of the scooter pack?

[@jehugarcia]

Not all packs have it

[@dmoore5774]

@@jehugarcia Ok. 7 of the 9 6x packs I ordered have it on all of them. The 2 boxes I haven't checked yet are on the way to me. Do you think someone on your team might know how to get it off without destroying the BMS board? Thanks

[@verbsy]

Hi great content xD i was looking to replace my scooter battery can you help please ? i currently have Lithium-ion battery 18650 16s12p 60v 31.2Ah/1872Wh with a charge voltage of 67.2 running 2* 2800 motors and it about 15x9x2.5 inchs in size ! space is a premium lol i was hoping to up scale in power but reduce in the space it takes up perhaps 72v 45Ah ... maybe using 21700 would reduce the space it takes up ?oh and a BMS to accommodate is this possible and can you help thank you for your time much respect just as an after thought if this goes well i was thinking to build an off grid solar camper van xD so this is the beginning thank you again sir

[@swormser865]

Will these work for a 48v lawn mower? Is the bms working or how do u charge them, thx

[@khandam7709]

no, but a week ago he said he will be selling 48v batteries soon.

[@CraftArtist]

How much to buy one of these?

[@jehugarcia]

Maybe

[@CraftArtist]

@@jehugarcia that would be awesome

[@penrodautorepair3170]

So you sell just the bums boards ?

[@jehugarcia]

No bums for sale

[@penrodautorepair3170]

jehugarcia I meant BMS

[@ferdockm]

Please try to move your camera so much because for me I get seasick watching it. Thanks

[@waltereason832]

Hi Jehu Here is a video you may want to look at, see how cheaper safety features test out that are used by your subscribers. I know in the past there has been some that had short circuit issues. Take a look at this: kzbin.info/www/bejne/pHavqKCcdrStlas

[@hrvojetelenta1578]

Always hiting limits,what to say except to invite you and your projects to Europa on my island Korčula and you whil enjoy summer and install all off your batteries that you have,big hello from me..

[@st3althyone]

I really hate when someone who supposedly knows their shit proclaims there might be “sparks/smoke”. It shows that you’re really just winging it and are hoping for the best outcome. Regardless, you will end up killing someone one of these days with all this bullshit. I appreciate you trying to test these battery backup systems and trying to show everyone how to build one, but the current in these systems are deadly and nothing to joke about. People are building these systems following your setup/mistakes and someone will need up doing something terribly wrong and end up burning down their home at best and at worst killing everyone in their household/neighborhood. Battery fires can really get out of control fast because of the high energy density in those packs and all the noxious fumes that are released when those batteries burn, this is deadly serious stuff.

[@jehugarcia]

Don’t be stupid, stupid. You are basically saying “ hey with all that driving that people are Doing someone is going to eventually crash and kill themselves”. Yes, the answer is yes. I am no expert, I never claimed to be one so don’t be an idiot by thinking I am.

[@st3althyone]

jehugarcia I never said you claimed to be an expert, and yes, electric vehicles are just like any other vehicle when it comes to accidents. The problem is that that Tesla or any automaker carries the liability insurance to deal with damages due to their negligence, you don’t.

[@Dylant38]

Wait, what was you powering with this?

[@jehugarcia]

The grid

[@Dylant38]

jehugarcia okay, I was waiting to hear the lift pump turn on but now it makes since. Great way to reduce power usage

[@AlejandroSalomon888]

Second coment

[@chr1z0r]

right, this thing, right, and this one, right, ähh, right, and this one here right,and right, u r right

[@jehugarcia]

Right

[@ahmadzaki3328]

In terms of charging them you will suffer

[@johnstaley2573]

Jehu, I know that we live in a capitalistic country and you’re trying to make a profit selling batteries, pcbs and whatnot but I personally liked it better when you were centered on electric cars. I don’t have, and probably never will have solar power so power walls are of no interest to me. I try to watch your videos but.....

[@GM-qh2ki]

Please focus on showing inverters that are made in the USA, as a lot of us will never buy anything from China. AKA Winnie the poo Kung Flu.

[@christiana2161]

the creator of that inverter is rogel naval with a great fb group support.

[@emmanuelebro58]

who is he?

[@Skupik1]

Can I use that inverter off grid, in a camper f.ex?