Using TWO EV batteries as home storage! 🤯

Enjoy a development update on the Battery-Emulator project. It is now possible to use TWO batteries at the same time, for an even larger home battery.
The Battery-Emulator can be found here: github.com/dal...
If you like the project and want to support it, join the Patreon (you get merch and Discord access!) via this link: / dala

[@alizain6171]

Hi dalas man, you are an angel to me. I am in North Africa and I work in an organization that works to provide water to remote villages. As long as there was a minimal problem in storing electricity, your channel appeared to me by chance. You do not know how much you have contributed to changing these people forever. I would like to thank you for all your efforts and everyone who contributed to the development of this project. I wish you a long and happy life

[@DalasEVRepair]

Thank you for watching, and hopefully you have use for these solutions some day!

[@alizain6171]

Of course we will​@@DalasEVRepair

[@TheOfficialBatteryMan]

A bit jealous of your workshop, so much space. Great work. Opening up possibilities

[@DalasEVRepair]

I am jealous too (of my parents)! I'm a poor milennial who can only dream of owning a space like this 😅

[@G-ra-ha-m]

@@DalasEVRepair Please avoid leaving an EV or lithium pack inside the garage or house. Risk is low, but the cost is high...if..

[@mikeycbd]

Wow. 4 years later still watching your work:-) Great video.

[@DalasEVRepair]

Thanks for joining the journey! ✌️

[@redoscar540]

This kind of reminds me what power station operators use to have to do to add a new generator to an AC system. They had to wait until the sinewave peaks were in sync and the frequency matched before closing the breaker. They say sometime the whole building would shake if you weren't close enough, banging the generator. 😂

[@DalasEVRepair]

Exactly the same feeling here 😂

[@damiangraek8559]

It's insane. I'm using your emulator now and was thinking about joining second battery, and then you just did it! Hats off, respect Dala! Great job ❤️

[@gtek8021]

Very bold and extremely interesting. I felt your nervous anticipation 😮

[@holle8882]

Well done Dala. A few weeks ago, I was wondering if you have a video with using a battery for home storage via Chademo so it can stay in the car. Now I know, you will bring a video soon. 👍. Thank you for bringing these ideas to life. Appreciate your pioneer work.

[@meganwinters5163]

I jumped on this video Soo fast 😂👍! Thanks Dala!!!

[@DalasEVRepair]

Thanks for watching the shenanigans unfold 😂

[@Freeze-WJ]

Once again thank you for your great work Dala!

[@eugeneputin1858]

Was waiting for a month for this one. Great job!

[@chorisonoma5229]

Thanks for the video. So the EV batteries in question if Lithium Ion operating in the 380 volt area should have somewhere just under 100 cells in the assembly. This is new info for me thank you. I have combined batteries of different capacity and differing ages with wide differences in internal resistance with no problems. The only caveat here is that your BMS for each battery should be the same manufacturer with the same communications. So what happens when the smaller capacity is charged faster is that the BMS turns off charging for that battery at 100% and the other BMS's for the other batteries keeps charging the higher capacity battery assemblies. You pointed out correctly that before doing the final hookup the voltage needs to be near the same, otherwise the higher voltage battery can rush to equalize the two batteries with a runaway ampere demand beyond the capacity of wiring or equipment. Thanks again..

[@rklauco]

This gets more and more interesting! Amazing work!

[@mmm1826]

You're a legend. Nissan needs to hire this guy immediately

[@selrahc2061]

You mean Renault, since that who owns most of Nissan. Also easier commute.

[@tobyholland1961]

😂😂😂 Nissan just wanna be selling new cars......

[@ashton9699]

Dala frankly cares more than Nissan ever did. Realistically, a big company wouldn't be a great use nor appreciation of his skills.

[@rkan2]

Most car companies are not in to reuse and open source. Some are better than others, but not even Tesla does what they say...

[@anttihuttula6547]

That would be wise for nissan. Dala would not be making any new videos and all techical data would be forbidden to say. Needless to say, big win for nissan. So what is this crap about hiring somebody when someone does good videos? Is it some status in bananastate, that someone is hired to work? Usually here people do things and other pays. No need to get hired, it is the end of life and career.

[@NB-ld1qt]

Great work Dala. Keep it up !

[@DalasEVRepair]

Thank you! ✌️

[@dombutler7685]

Nice work Dala! I'm the same with turning something on, even though I know it'll be ok! And thank you for making it open source! Also, did I see your old white leaf get an upgrade??

[@selrahc2061]

You need concrete board behind all the stuff on your wall. Just a extra layer of safety over the combustible wood of your house.

[@kennycheung1928]

Thanks for doing this experiment. I was thinking when there is a manageable voltage difference say 12v a dc load could be used to regulate the current flowing between 2 battery. Battery cooling is important.

[@jamesphillips2285]

12V at 1 milliohm would be a current flow of V=IR-> I=V/R-> 12V/(0.001)= 12kA. That is higher than the trip rating of some circuit breakers (typically 10kA AFIAK). Dala measured to 0.1V. 0.1V/(0.001)= 100A. Still a lot of current: but at least the batteries are designed to handle that.

[@AdrianMcDaid]

Always great videos.

[@DalasEVRepair]

Thank you! ☺️

[@ulf5738]

Sketchy for sure 😂❤

[@NobodzzZ]

watched 10 secounds, most dangerous on this channel... I'm in!

[@partasuhari]

Very exciting project. Next step triple battery ? 😄

[@evilspoons]

Nice Volvo!

[@aminorjourney]

I'm sorry - I was just a little distracted by the AWESOME VOLVO!

[@DalasEVRepair]

1969 Amazon, maybe time to build an Amazero soon? 😎

[@typxxilps]

I love this kind of unique and challenging content to get an impressionn what is possible today as alternative to our 14 kWh LFP DIY builds. But the more the price for LFP are dropping the lower the likelyhood that we will ever get one car battery. 2 of our LFP 14 kWh batteries are brand new in metall case and with JK BMS just 3000€ . I doubt that it is easy to get 2 of these old car batteries for just a few thousand €.

[@DalasEVRepair]

You'd be surprised! Where I am, you can get a 64kWh battery for 4k€

[@FeeeshEP3]

Great stuff! Excited for this!

[@adrianflower3230]

Fantastic project, this has to be a natural way forward for all the used battery packs that are accumulating. Unfortunately the National Grid in the UK prohibits Vehicle to grid. They have some test projects, that relied mainly on a Wallbox Quasar 1 V2G charger. This has now been removed from sale. We await developments. I'm assuming our ultra cautious regulators will run a mile away from DIY solutions. How is your country with V2G ?

[@rjung_ch]

Thanks Dala, this project is great. 👍💪✌

[@DalasEVRepair]

Thanks for following along! 👍

[@GlynHudson]

Impressive!

[@DalasEVRepair]

Thanks Glyn! ☺️

[@127069]

On behalf of leaf owners I thank you!

[@greenfrog58]

Great video! 🇸🇪

[@DalasEVRepair]

Tack! :)

[@nogassini]

Hi Dala thanks for your great videos!!!! I am really looking forward for Chademo support!!!!

[@DalasEVRepair]

Thanks, me too! 😁

[@selmopt]

i had scary fireworks so i from now on will buy solid li batteries

[@michaelp8563]

Nice Work again and again

[@upnorthandpersonal]

Now I need to upgrade my 100kWh. Feels small :)

[@DalasEVRepair]

200kWh is a crazy homebattery 😅 And 100kWh is already overkill!

[@upnorthandpersonal]

@@DalasEVRepair Well, mine is off-grid. Never too big!

[@janterjeaugestad8431]

@@DalasEVRepair 200kWh is just the right amount! I'm in Norway, and with 2 EV's we sometimes use around 140kWh per day in winter. So to have a full day + buffer in storage would be great.

[@chargeheadsuk]

Loving the drama Dala and great work. I hope you don't mind me asking, how are you getting on with powering up the kempower DC Monster? 😉

[@DalasEVRepair]

Thanks! Still waiting on a measly 63A grid connection, almost been 10 months of waiting now...

[@chargeheadsuk]

@@DalasEVRepair fingers crossed they'll sort it soon 🤞

[@jaakkoiswatching6437]

Would this be possible for a vehicle too? EV-converting a large van with two Tesla packs could give a more usable range. Maybe even a dumb version, first drive one battery to empty, flip a switch and use the second battery, then charge both separately?

[@DalasEVRepair]

This hardware is not used for EVs, it is for stationary use. But the same method can be used on an actual EV, just port the code to the hardware that is used as VCU

[@SillyID]

Hi Dala, do you see any chance to get an BMW i3 hooked up via CCS as an External „battery“ just for charging? Like using the car battery via CCS cable directly on Fronius Symo gen24 10 for example? Just by stats this should be possible. Bidirectional would be like the holy grail but just DC charging from Panels to car without AC side should be much more efficent… what are your thoughts? Thx for all your efforts! Keep going/charging 😁

[@DalasEVRepair]

This is doable, but the Battery-Emulator does not have the hardware required for CCS. It uses powerline communication (PLC), so some other hardware is needed to activate the CCS session. Someone might be able to develop an add-on board for this?

[@SillyID]

@@DalasEVRepair what if i tear down an fronius wallbox which is type2 and us CP, PP, PE but instead of 1/3ph using a Combo2 Plug which is wired to Bat+\- on symo gen24 🤔 would be almost same level of Sketchy than your repurposed 32A CEE😂

[@gowron492]

Great work, Have you though about adding Vauxhall/Opel/Stelantis batteries to the list?

[@DalasEVRepair]

Feel free to help, i have a page on what is needed to add a new battery integration on the wiki! github.com/dalathegreat/Battery-Emulator/wiki/Data-needed-for-new-battery-integration

[@rkan2]

I wanna build that 2m$ solar catamaran with 300kWh and solar for 100k$ 😅

[@Ryukachoo]

I'm reallly hoping this becomes a trend Theres tons of ev batteries just wasting away in junkyards that'd be excellent as home energy storage, the problem is just getting the software on the battery modules happy to charge and discharge

[@DalasEVRepair]

Checkout the supported list on the Battery-Emulator wiki, it is growing every week! Soon we will have almost all the popular EV models supported! ✌

[@petedawborn]

Thanks for this very interesting Dala. I’m interested to know when you say battery storage still in the car using a Chademo connection, are you referring to both the Nissan leaf and the Mitsubishi imiev as options for this?

[@DalasEVRepair]

Depends on how old the imiev is. It needs Chademo 1.0 support on the vehicle side. Early LEAFs (2011-2012) are not capable of V2X, since they only support Chadeo v0.9!

[@mojonojo3]

A question about what Inverters are supported - Are SolarEdge inverters on your list to support in the near future?

[@DalasEVRepair]

We can add any new inverter, as long as someone provides communication logs! See the Wiki: github.com/dalathegreat/Battery-Emulator/wiki/Data-needed-for-new-inverter-integration

[@HakalaOlli]

Voitko laittaa Suomen kielisen tekstityksen videoosi, että kännyllä voisi nähdä Suomi tekstin?

[@DalasEVRepair]

Eikö KZbin voi generoida niitä automaattisesti? Täytyy tutkia...

[@DalasEVRepair]

Se toimii, laita vaan teksti päälle, ja sitten valitse kieli!

[@HakalaOlli]

@@DalasEVRepair Kotitietokoneella ehkä, mutta kännyllä ei, asetuksista jostain pitäisi saada Suomi tekstitys videosi päälle...

[@KorberRichard]

Cool🎉

[@notsonominal]

Ignore the fact that is is a car ... thats what I did with my leaf every day for 10 years:P

[@sk8er4lifeez]

So you can dual battery the car aswell?

[@Mikexception]

Buying for all that stuff like house . EV car, one more battery, supervising computer, photocell instalationa with it's controll and switchboard apparatus and then living in stress is even more scary then electrical failure. . It takes time and money for investment. How to have time to make money for living and for family?

[@ua420]

I plan to try Chademo support for times when we have no grid here in Ukraine because of Russian attacks. I wonder if it safe to use $120 bare inverter board off Ali express if I’m only interested in discharging.

[@DalasEVRepair]

Yes I will post more about it once we are sure it works like intended. Slava Ukraini! 👍

[@kevinbreslin5718]

Would like help identifying an inverter available in the US to use for a leaf to grid tied solar system. Fronius is still out till the end of year.

[@DalasEVRepair]

This has been discussed frequently on the Discord server. Solis, Foxess, and soon Fronius looks like great options for the US!

[@kevinbreslin5718]

Ill check this out thank you

[@jak8]

loimaalla oli iso osa ilman sähköä tänään, aurinkopaneelitkaan ei auttaneet mitään, toimiiko tuo sun systeemi jos verkko menee matalaksi? 20 tuntia jo katkon alusta ja edelleen satoja taloja sähköttä

[@DalasEVRepair]

Kyllä toimii, riippuu vaan mitä invertteri käytät. Esim mun Fronius Gen24 tue täys-backup!

[@KS-wr8ub]

Temporary permanent! Motto of my life lately.. 😂

[@DalasEVRepair]

😂 I live for those temporary permanent solutions 😂

[@rickymartin06]

im like why hes so scared we do this all the time where i live 😅 we even put batteries with different ah same or similar voltage they will slowly balance themselves even put diferent chemistry batteries in parallel

[@tbarrera1833]

thank you for the vid. i have 2 100 kw packs from 2021.5 model sx cars. im looking for a way to control them via canbus for off grid storage and use. I'll be watching your vids in order to learn.

[@DalasEVRepair]

The Battery-Emulator will work excellent for those!

[@totclueless]

Just a quick question do you happen to know if a 2012 leaf battery will fit in a 2013 leaf

[@DalasEVRepair]

Mechanically yes, but the B24 connector and software bit, NO. 2011-2012 ZE0 is very different to 2013+ AZE0 generation

[@totclueless]

Thanks great channel

[@totclueless]

Do you know if you could take the cells out of the 2012 pack and put them in the 2013 case

[@DalasEVRepair]

@@totclueless whole lot of work for very little gain. I'd recommend searching for a newer pack!

[@totclueless]

Thank you for the advice .love the videos

[@thilomatsch440]

I wish, we would be neighbors :) iam stock in a can problem. maybe you right with 2 channels, but if iam wannaa get it to tcp/ip i also need 2 converter or? ;//

[@DalasEVRepair]

Check the Wiki for the Battery-Emulator, all info is there!

[@MrNagafen]

Fuvk... that was nervewracking.

[@eunu6928]

It is a device that stay between inverter and battery's and manage on/off and do equilibrium between HV batterys with different voltajes ? 😅 Ps. How can i equilibrate new cells that i allready added on Leaf 30kwh without open the case again ? New (SH) cells are off with 50mV :(

[@DalasEVRepair]

No real way to do it without opening the battery!

[@Goodkiwibloke]

You can power up the LBC (BMS) through the round communication plug using a 12V bench power supply. If it has power, it will passive balance, doesn't need CAN or anything else. Best done with a fully charged battery. In time, it will burn off the higher voltage cells. I do this for a couple of days before installing a replacement battery pack Just be aware, that if your cells have different AHr, they will not maintain balance through the discharge cycle. And if seriously different capacities, you will get weak-cell warnings

[@DalasEVRepair]

@@Goodkiwibloke The bypass is a few mA. Could take 3 MONTHS being powered on to balance out a 100mV diff...

[@Goodkiwibloke]

@@DalasEVRepair greetings Dala, another good video. I use leaf modules at nominal 48V (14S) and they are very robust in the low stress home storage application. I have about 1000AHr and just keep adding more as I do Leaf battery replacements. Over 4 years use, SoH is still 95% (of the original degraded capacity) Anyway, the chap asked for a solution that doesn't require dropping the battery, opening the case and presumably removing the stacks to get terminal access. That's what I gave him. Yes, it's slow, but he claims only 50mV = 19.5WHr at a cell (parallel pair) level for a 100% SoH 30KWh pack. Assuming a 200 ohm balancing resistor and 4.000V cell voltage, that's 10.1 days to "perfect 0mV balance" on a 100% SoH battery. But anything

[@pederb82]

Hehehehe. A bit too nervous. It’s no issue if there is a bit of a voltage difference as long as you have fuses to secure it don’t overload your cables. The batteries will simply equalize to the same voltage by making the battery with the highest voltage charge the one with lower voltage. But I guess you have to make some drama 🎭 for the viewers.

[@DalasEVRepair]

I checked with industry professionals. They use +-1.5VDC as a safety limit when connecting packs in parallel to avoid blowing fuses.

[@pederb82]

@@DalasEVRepair that sounds about right. But there won’t be any booms or spark showers or fires. One will simply charge the other. The internal resistance plus the resistance of the cables and most importantly: the battery with the highest voltage gets it’s voltage pulled down under load charging the weak one. Thus limit even further the difference and total amps you will see. They are overly careful with 1,5 volt and it’s nice you’re being careful. But it would have been just fine with the diff you had.