David, I purchased 4 of these modules, I only did a capacity test on one battery only and got 294 Ah. These are a incredible buy, I am using a smart Daly 16S 150 amp hour BMS’s on each two modules! All batteries were top balanced individually to 3.45 volt down to 2 amps with my Ztech 40 amp chargers. Yes, I did use your discount code, thanks!!
@@DavidPozEnergy I used to pickup bed frames from along side the road and thought I'd use it for non critical projects in place of expensive angle. Well, I found out the same as you. You can't hardly drill thru them and try driving a self tapping screw into them. Not happening. I quit picking them up and rarely use the for anything now. I wonder what they did in the process of making them that made them so hard?
I’ve been passing to everyone. With the weight of batteries 🔋 and wall mounted hardware. Getting a engine lift to help pickup and install to he wall will save your back. The Engine Lifts are mounted on wheels and has good reach with weight abilities. And you do some heavy lifting. Thanks again for your posts.
These modules look amazing and the only negative I can see is we didn’t get to see you build “stuff”, they were almost plug and play. No welding, cutting, soldering or measuring - just adding 6” of wire. That’s what I love about your channel - David Poz builds “$hit”!!! Thanks for showing these cells and I may expand my off grid system.
Hi David from Australia, we enjoy you sharing your knowledge and equipment. Bummer we cant get this in Aust. I'd purchase straight away. Thx anyway will continue watching you vids
love the videos, i wanted to get one of those packs just cant justify the shipping for only one battery, and cant afford more than one hahah, but i can live vicariously through you
Individual cells can be shipped in smaller boxes, saving money on shipping. That would probably be a better choice if you are making a single 24V battery.
I am trying to catch up on how to utilize the lithium batteries. I am still assembling some solar panels from individual cells I purchased year ago. They are intended to go with a small camper trailer. The way I'm approaching the shipping cost problem is getting friends interested in doing this as a joint venture.
You inspired me to purchase two of Battery Hook up's Gotion 16s 51.2v 240ah 12.3kWh Lifepo4 Battery's. comes out to about 130 a kw hour when you factor in purchase of the BMS, tax, and shipping. (not counting a breaker or a disconnect.) Still waiting on them to arrive.
I just purchased 8 of these modules and 4 jbd 300amp smart bms from them and since im 30 min outside philly I drove my 3500 and just picked them up. Amazing savings for 1120ah 😮
First off, you are strong as can an ox! I thought I was going to just pick these batteries up like you were holding it at the beginning of the video.... My back is very upset right now lol. They didn't have any of these packs as you bought them, the only option was the auction pallets. I bought some and one module had a bad cell. I figured it was no big deal, I'll find a way to take off the welded terminal and put a new one in. That was short-lived. I was able to cut and pop off the terminal so I started to unscrew the bolts but found there were rivets on the bottom so I drilled them out. I then found that the top and bottoms are also welded. It's impossible to get these out lol. I am thinking of just setting a cell on the side and connecting it 😂 I have 8 of these modules so I have some work to do! Some of them just have the welded terminals broken so I will have to drill in the cell and put a helicoil but we will see how that goes.
If these are going in a stationary application (like I'm using), then I suspect one cell on the side isn't going to make or break your build. Keep to what's easy for you. Thanks for sharing your experience.
Here’s an update. I opened the module finally and I went to helicoil one of the cells. I researched that they are 6-7mm depth. I went to 5mm and went thru. I went to do another and couldn’t get enough threads even after cutting off the taper. Tried another one a little deeper and went through. I think I’m just going to replace with studded cells.
is there any harm in using existing balance wires and tying them to the BMS harness? I ended up drilling through 3 cells and stripped 2 because it was too shallow to grab. I accidently popped 2 welded terminals off while trying to open the case so I will have to replace those too. @@DavidPozEnergy
I re-use existing BMS wires all the time for my new BMS. I'll point out something that is probably obvious, but here goes: BMS wires are thin, and can't carry the full current of the cell. Don't try to use the BMS wires as power wires.
@@DavidPozEnergy Ive got them wired up to a sweet busbar. Last question (i think) is there any way to reweld broken welds or any links you know of to do this? Trying to drill the holes has not worked and ive tko'd a few I believe that welded cells have a shallow avalible depth compared to naturally studded cells.
very nice!! and thank you for doing cost #2 'or 'full rack'. My first question while watching was "how many units can ship on a pallet?", which you answered. The 7 unit build is bigger than I need, but cheaper than my original plan. Very intriguing and seems more than worth it. I just need to decide on BMS size/type. Very helpful - thank you!!
I just ordered some of the SPIM08HP cells and hardware for making a battery for my UPS (not quite set up for house inverter yet) that runs my server rack and livingroom. I used your promo code, of course 😉 So now just waiting for them to pull the order and ship so I can get that online soon
Guess it makes sense to rack panel makers to place the display, switch, etc, inline with where cables, solid busbar runs. Perhaps that would be a good suggestion to them. Now to check out cost to Au.
The problem is that the NEC 2020 and beyond are requiring that ESS be "Listed" or field inspected for compliance to UL standards. That is expensive, so there is no savings in building a DIY battery if you're required to comply with code.
Only matters if you're installing in your house/living space. Most building DIY large ESS do so in a separate battery shed which negates the code compliance issue. Or they are off grid and not worried about inspection. My electrical inspector only cared about the AC side of the system. Didn't even look at the DC side even when asked if he needed to see anything.
Subbed. Love your approachable builds and looking forward to building one when we have our own place. Question: do you think something like this would be doable in a van? 14kwh would be plenty!
I'm currently using a Schneider XW PRO 6848 inverter. And, I bought a second one to parallel for even more power. I have videos on the inverter. My favorite video is testing the overloading capacity, because It's the best I've ever tested: ua-cam.com/video/nCV1OUrcAaw/v-deo.htmlsi=rsaoG1UQ0sYt0pA0
@DavidPozEnergy I have an existing 14.5kw micro inverter PV system and trying to add whole house backup/off-grid battery system. I need 70-75 kw batteries to do this for the worst case days
You may want to research a term called "AC coupling". Some inverters will allow AC coupling, and some don't. If you have this feature, then you can still use your existing solar system (with micro inverters) while the grid is down. I've tested the AC coupling feature on my Schneider and it works well. If you don't want to go Schneider, look at SMA Sunny Islands, they also do it.
@DavidPozEnergy Sol-Ark 15kW All-In-One Hybrid Inverter, can it just $7k. And well it is a lot to spend on just the inverter with no one I trust is speaking about it.
Personally, I'm not a fan of the Sol-Ark line of inverters. If you want those types of features, then check out this one: signaturesolar.com/eg4-18kpv-hybrid-inverter-all-in-one-solar-inverter-eg4-18kpv-12lv/?ref=4_rHcgZ9x-TiF- note, this is an affiliate link.
After your last battery video, battery hookup ran out of stock on the 20s packs quick! And I missed out. The success of that video hurt me lol so I better jump on this deal stat!
@@DavidPozEnergy it pretty much seems perfect for my build so I ordered 6. I used your discount- thanks edit: boy am I glad I acted quickly: showing sold out on the website already.
I used an orange copper busbar. It's semi-flexible and left over from a battery I took apart previously. I save spare parts for this reason. I show it in the chapter installing the BMS.
I think so, but I haven't tested it. I have a video setting up closed loop with a similar BMS to the Schneider Insight home. The process might be the same, but you would have to confirm with Orient Power. Like I said, I haven't tested this "DIY BMS" with Schneider. ua-cam.com/video/qs2gE2wR3ZA/v-deo.htmlsi=9TyCDVHETOtc_8Ac
If the battery cell capacity is around 280AH, it means it can provide higher current output capacity. Using a 100A BMS may result in a lower current, 200A BMS would be faster.
Thank you for posting these info / how-to's! I learn alot (and still learning). I have a wood shop that I would love to make 'off grid' that could take advantage of the sun and wind in my location. Out of curiosity, have you written a 'how to' in building, installing an 'off grid' system that incorporates solar panels and battery systems? Or is there a book you'd recommend, if not a series of books?
I have not written a book. I've read dozens of books on the subject, but I don't recommend any of them. My favorite series to recommend is a 6-part video series from Alt-E: www.altestore.com/diy-solar-resources/off-grid-solar-system-design-video-series/
I may have missed this in your previous videos, but have you done an estimate on how much battery you need to be totally off grid? I realize there are many ways to skin that cat, how much power you generate in winter, etc, but a case study does wonders for understanding.
That is a battery charger, specifically for LiFePO4. That particular model is not sold, but very similar ones are available. These days, I use the "Chargverter" all the time: signaturesolar.com/eg4-chargeverter-gc-48v-100a-battery-charger-5120w-output-240-120v-input/?ref=4_rHcgZ9x-TiF-
It says "APC Infrastruxure" on it. I'm not a computer guy, so I really don't know how to tell one thing or another. I bought it from my local recycling center for $75. The outside dimensions are 23W, 42D, 82H
Thanks for the test and giving me more options for DIY builds! My motorhome is already set up as 24vdc with two 3kw Growatts. Could I use the Jakiper bms and just change its parameters to 24vdv pack settings?
No. The BMS is 48V only. Battery Hookup sells 24V BMSs. Select "8s LiFePO4" from the dropdown list: batteryhookup.com/products/12v-lifepo4-smart-bms-w-low-temp-cutoff?_pos=6&_sid=be404606b&_ss=r&variant=37389087506594 Although, just now when I snagged the URL for you I see they are sold out. They usually restock quickly, but you could call and ask when they might have more.
No, sorry. It was something I had from another battery I took apart. If I didn't have that I'd probably use a 1/0 wire with a ring terminal crimped on both ends.
I see jakiper also sells a 230 ah server rack battery. Have u asked if they will sell the front panel of that model? Better breaker and I like the terminal set-up a lot more. For safety I assume u will parallel these once hooked up to your system. Whats the Max wire lug u can get on terminals?
Than you David. Good video. Question: Does the Jakiper BMS setup work with Schneider xw pro. Is SoC available? Also, what base are you using to place the batteries?
This is all very intriguing, however where do you start if you don't have an electrical engineering degree? I love the DIY aspect, but it feels like this is over my head.
Begin with what your goal is. My goal is to power my house and garage, year-round, off grid. However, you might have a smaller goal in mind. My very first solar project was to have one LED light bulb on, and charge my cell phone. There is a great video series that I recommend. It's 6 parts and worth the time to go through them all: www.altestore.com/diy-solar-resources/off-grid-solar-system-design-video-series/
You need to put a good active balancer on those packs, (NEEY) especially with the studs on those cells, it would be simple to install, or the JK BMS with 2 amp active balancer..A passive balancer will never get those under control in the long run..Communication really isn't important, a smart shunt and the bluetooth app with the JK BMS is really more than enough..I don't even have a shunt for my different two 16s 48 volt packs..It's fine...I'm still building CATL packs I got from Battery Hookup, and I have 16 280 Ah Eve cells, but I'm getting there..Everyday somethings showing up, only need a few more pieces of the puzzle..
@@DavidPozEnergy Ya, you can't leave them on all the time..Only when the pack finishes charging and is settling into it's regular resting voltage..And then they work like a charm...I charge to 3.45 a cell which is 55.2 volts, and that is when the balancer kicks in, it stays on for an hour until the voltage is resting at 3.35 a cell or 53.6 and the difference between the cells is 3 to 5 millivolts...My buddy hooked me up with that system, and he said he learned it from someone who tests packs on the internet..Works very good..Even on used cells..But, if you leave the balancer on all the time, it makes the situation worse, and I can confirm that, because I tried it on two different packs..
Just wondering what type of thread and size the nylon nuts are for the cell terminals (M10, 7/16") and what size bolt (M12, 3/8") and thread were the main battery terminals? I'm putting together my batteries now with the DIY faceplates. You would save me some time ordering the incorrect type. Look forward to your response. Cheers
Yes and no. Technically speaking, if we are using NASA grade lab equipment, then the answer is "yes". But, in the day-to-day cycling of the battery, "no". When I tear down pre-built batteries, they have different length wires. As you could probably tell, I left the wires the same length where I could.
Hello Dave, Have you gotten your hands on the Battery hook up 51.8v 252ah 13.05kWh 14s ESS Battery Module with BMS battery for sale. Looks tempting, would love to know if we can actually use the bms and RS485, Can, and RS232 it comes with our inverters. Maybe this can be your next video. If anyone can figure it out it would be you.😂
Your discount codes aren't working for Orient Power. The 8% isn't too surprising since it was limited time, but the 5% isn't working either So glad I found this video, I had no idea this diy bms was available. That will actually let me make a professional looking battery that is nicely enclosed
I asked them about it. If an item is already on sale (example: early black Friday) then you can't double up the discount. Sorry about that. Please still use the affiliate link, as it's how I can continue to make these videos.
Would you like to do a capacity testing on our brand new HSEV EVE 280K cells? We have tested most of them are over 300ah! We hope you can do a test for them too…
Shipping is something to consider for sure. Sounds like shipping would add $200-$400 more for you, compared to what I paid. That adds $14-$28 more per kWh if you are buying 2 modules (14kWh). Or, $2-$4 more per kWh if buying 98kWh.
Signature Solar is selling EG4 server batteries brand new for $195 per KWh currently with no DIY/wiring/BMS currently. I want to go that way but the diy is so attractive tbh, think i may go this way instead
There are pros and cons to both ways. I bought a rack of EG4 batteries about 2 years ago and it's still working well. Here is my affiliate link to Signature Solar if you decide to go that way, you would be helping the channel: signaturesolar.com/?ref=4_rHcgZ9x-TiF-
Have you ever built a 36 volt battery for a golf cart ? I'd like to build a 36 volt lithium battery pack to replace six 6 a volt Trojan lead acid batteries. Great videos, thank !
I replaced the lead acid batteries in my golf cart (36V) with a 36V lithium module I bought from Battery Hookup. batteryhookup.com/products/36v-48ah-1776wh-spim08hp-36v-power-module Add a BMS, at least to control charging. Discount code: DAVIDPOZ
But, How many years will they last. My electric bill is around 300/month x 12 thats 3600 a yearish its less in the Winter because I live in FL. spending 12k plus idk how much in panels to charge these guys, everything would have to last 5-7 years just to recoup my costs. Do you think these batteries being used daily to power a home could or would last that long?
The BMS has a balance function built in. This BMS uses resistors for balancing, which is usually referred to as "passive balancing". The BMS will eventually balance the cells on it's own, but I sped up the process with an I-charger.
My local recycling center. I bought it for $75. You can also search on craigslist and Facebook Marketplace. Use search "Server Rack" and "server cabinet". The CATL module was about 1/8" too wide, so I notched the back rail to slide it in.
The BMS will eventually top-balance the cells on it's own. I used the I-charger to speed up the process. Another alternative I've done sometimes. Get a water heating element, connect two wires, and drop it in a bucket of water. When you are charging the whole battery, and notice one cell is higher than the rest, put the two leads on just that cell and it will burn off some of the power. Another alternative is to get a cheap hobby charger, like this $40 option: amzn.to/3Zhlbkx which comes with a accessories. Charge each cell one at a time up to 3.65V.
David, what's the size of the bolts in positive and negative ends? I do have these but there's no bolts included and one positive bus bar end been cut.
There is already a popular open source project called DIYBMS that's been around for years, and is used with cells like these. This will lead to confusion.
Really? That's awesome there is another BMS option. I hope there is not confusion, that would stink. Can you send me a link for the "DIYBMS" so I can check it out?
I'd get a couple of these if they were available in Europe. Also, with a bit of creativity, could parallel up the batteries and cells and use 1 BMS for 2 or more sets, but balancing current would proportionately decrease per cell.
Sure you can! You can parallel each identical battery with the same age and capacity. If you are looking for best price in Europe, use grade A Fogstar from UK or choose German cells. Another good company with good price in UK, is Roamer. You can get 48v 5.4kwh battery for 1.8k with incredible good warranty 10 years which is not easy to find anywhere.
I charged the pack at a low Amp rating (I got my charger down to 2A) until one cell hit 3.65V and the BMS shut off. This allowed the balance to be on for a couple hours while charging. I then turned off the charger and let it sit overnight. During the night it continued balancing until the cells fell below the programmed threshold. The next day I would discharge a couple Ah out of the pack. Then I'd turn on the charger again at a low current until the BMS once again shut off. I could do about 2 or 3 of these cycles per day. And I did this process for 3 days.
Your welcome. There are many ways to top balance. Sometimes I just use my i-charger. Sometimes I charge each cell individually. If the cells are not series connected, then I can parallel all of them together. Just depends on the situation I'm in at the time.
This is the ONLY channel that TEACHES me stuff! I sell solar(used to install) and I didnt realize how much i didnt know!
David, I purchased 4 of these modules, I only did a capacity test on one battery only and got 294 Ah. These are a incredible buy, I am using a smart Daly 16S 150 amp hour BMS’s on each two modules! All batteries were top balanced individually to 3.45 volt down to 2 amps with my Ztech 40 amp chargers. Yes, I did use your discount code, thanks!!
Wow! You got great results from your test.
Nice. Proper capacity test makes me hit the like button.
like it
Wow what a great system. This is the cheapest system that I feel confident won't blow up my house. Thanks for sharing.
This is a much better option for DIY 18650
Bed frames seem to turn up in my life regularly. Chop saw and a cheap welder builds me all kinds of racks and mainframes.
I've used bedframes on some projects. I remember once not being able to drill through it. Have you ran into that?
@@DavidPozEnergy yeah it is hardened. An option is the carbide bits for concrete will work.
@@DavidPozEnergy I used to pickup bed frames from along side the road and thought I'd use it for non critical projects in place of expensive angle. Well, I found out the same as you. You can't hardly drill thru them and try driving a self tapping screw into them. Not happening. I quit picking them up and rarely use the for anything now.
I wonder what they did in the process of making them that made them so hard?
@@jws3925 high grade steel and properly annealed- heat treatment
I end up with bedframes too. And aluminum ladders. Its a universal constant for me.
Not bad of a price for 14kWh!! I like the way that plastic tray holds the wires nice and neat!👍
Yeah, that was a nice little bonus.
Clean simple and at a reasonable price 👌
Looks like the setup is pretty easy.
Fantastic!!
Sweet good vid David
Very good capacity for used cells. Nice build
Agree
Nice looking DIY
I’ve been passing to everyone. With the weight of batteries 🔋 and wall mounted hardware. Getting a engine lift to help pickup and install to he wall will save your back. The Engine Lifts are mounted on wheels and has good reach with weight abilities. And you do some heavy lifting. Thanks again for your posts.
You can get a 1 ton chain hoist for less than $40 - works like a charm.
good suggestion
step one: don't be weak LOL
Brilliant video. What a shame there isn't something comparable in the UK.
Orient Power Powerwall battery is available in stock in UK.
Good video!
Link to batteries is broken
I think that's a pretty good price, plus I like the fact that the batteries have fairly robust protection
Nice work David! Good idea to ask Orient Power to sell the "DIY BMS"!
yeah, that is pretty cool
It is our pleasure to bring new products as per market & clients requirement.
@@AGhostInTheMachine thanks
These modules look amazing and the only negative I can see is we didn’t get to see you build “stuff”, they were almost plug and play. No welding, cutting, soldering or measuring - just adding 6” of wire. That’s what I love about your channel - David Poz builds “$hit”!!! Thanks for showing these cells and I may expand my off grid system.
very easy right?
For the price whats better on the market?
Thanks man, 514!!
Hi David from Australia, we enjoy you sharing your knowledge and equipment. Bummer we cant get this in Aust. I'd purchase straight away. Thx anyway will continue watching you vids
love the videos, i wanted to get one of those packs just cant justify the shipping for only one battery, and cant afford more than one hahah, but i can live vicariously through you
Individual cells can be shipped in smaller boxes, saving money on shipping. That would probably be a better choice if you are making a single 24V battery.
I am trying to catch up on how to utilize the lithium batteries. I am still assembling some solar panels from individual cells I purchased year ago. They are intended to go with a small camper trailer. The way I'm approaching the shipping cost problem is getting friends interested in doing this as a joint venture.
I would buy a 24v diy BMS if they had it available. I bought three modules thanks for the info.
You inspired me to purchase two of Battery Hook up's Gotion 16s 51.2v 240ah 12.3kWh Lifepo4 Battery's. comes out to about 130 a kw hour when you factor in purchase of the BMS, tax, and shipping. (not counting a breaker or a disconnect.) Still waiting on them to arrive.
Nice presentation. I'd recommend beefier connections to your batteries. With the amperages you are pushing they seem a little light.
I just purchased 8 of these modules and 4 jbd 300amp smart bms from them and since im 30 min outside philly I drove my 3500 and just picked them up. Amazing savings for 1120ah 😮
Good deal. An hour trip is worth the savings in shipping for sure.
I have emailed them about that BMS to see what Inverters it support but didn't get a reply.
What inverter are you goint to use with that bms?
Thanks
Thanks for the great videos David! I picked one of these up a couple of weeks ago
great, share us the experience once installation finished.
Nice wiring on the cells , what a nice setup .🇬🇧👍
Thanks
First off, you are strong as can an ox! I thought I was going to just pick these batteries up like you were holding it at the beginning of the video.... My back is very upset right now lol. They didn't have any of these packs as you bought them, the only option was the auction pallets. I bought some and one module had a bad cell. I figured it was no big deal, I'll find a way to take off the welded terminal and put a new one in. That was short-lived. I was able to cut and pop off the terminal so I started to unscrew the bolts but found there were rivets on the bottom so I drilled them out. I then found that the top and bottoms are also welded. It's impossible to get these out lol. I am thinking of just setting a cell on the side and connecting it 😂 I have 8 of these modules so I have some work to do! Some of them just have the welded terminals broken so I will have to drill in the cell and put a helicoil but we will see how that goes.
If these are going in a stationary application (like I'm using), then I suspect one cell on the side isn't going to make or break your build. Keep to what's easy for you. Thanks for sharing your experience.
Here’s an update. I opened the module finally and I went to helicoil one of the cells. I researched that they are 6-7mm depth. I went to 5mm and went thru. I went to do another and couldn’t get enough threads even after cutting off the taper. Tried another one a little deeper and went through. I think I’m just going to replace with studded cells.
is there any harm in using existing balance wires and tying them to the BMS harness? I ended up drilling through 3 cells and stripped 2 because it was too shallow to grab. I accidently popped 2 welded terminals off while trying to open the case so I will have to replace those too.
@@DavidPozEnergy
I re-use existing BMS wires all the time for my new BMS. I'll point out something that is probably obvious, but here goes: BMS wires are thin, and can't carry the full current of the cell. Don't try to use the BMS wires as power wires.
@@DavidPozEnergy Ive got them wired up to a sweet busbar. Last question (i think) is there any way to reweld broken welds or any links you know of to do this? Trying to drill the holes has not worked and ive tko'd a few I believe that welded cells have a shallow avalible depth compared to naturally studded cells.
awesome work David! this set up is so impressive
well done! thanks for sharing this
Wo great battery
really great, informative content. thank you.
very nice!! and thank you for doing cost #2 'or 'full rack'. My first question while watching was "how many units can ship on a pallet?", which you answered. The 7 unit build is bigger than I need, but cheaper than my original plan. Very intriguing and seems more than worth it. I just need to decide on BMS size/type. Very helpful - thank you!!
Your welcome. Good luck with your build.
I just ordered some of the SPIM08HP cells and hardware for making a battery for my UPS (not quite set up for house inverter yet) that runs my server rack and livingroom. I used your promo code, of course 😉
So now just waiting for them to pull the order and ship so I can get that online soon
Sounds good. Thanks for using the code.
Wow! That is amazing, Thanks Dave 👍
Great video
Guess it makes sense to rack panel makers to place the display, switch, etc, inline with where cables, solid busbar runs. Perhaps that would be a good suggestion to them. Now to check out cost to Au.
The problem is that the NEC 2020 and beyond are requiring that ESS be "Listed" or field inspected for compliance to UL standards. That is expensive, so there is no savings in building a DIY battery if you're required to comply with code.
yep, you'd have to get inspected with a minimal UL listed system then add or replace with DIY
No one DIY building batteries is doing so commercially, so pretty sure that Code compliance won't become a significant issue.
Only matters if you're installing in your house/living space. Most building DIY large ESS do so in a separate battery shed which negates the code compliance issue. Or they are off grid and not worried about inspection. My electrical inspector only cared about the AC side of the system. Didn't even look at the DC side even when asked if he needed to see anything.
I’m in PA.. wonder if I could pick these up at the warehouse!
excellent video - building my own with components suits my style
DIY
Thank you for another nice video brother
excelent.
Nice that's great to know. Love the video ls keep it up.
Thank you for your video I look forward to these you're so knowledgeable
very impressive
Subbed. Love your approachable builds and looking forward to building one when we have our own place. Question: do you think something like this would be doable in a van? 14kwh would be plenty!
Sure, this is something that can be built into a Van. I would spend a lot more time bolting things together and securing them into the frame.
It seems that Battery Hook up doesn't have these packs in stock...
Geat video. What charge inverter would you put on these to power whole house with the 100kw?
I'm currently using a Schneider XW PRO 6848 inverter. And, I bought a second one to parallel for even more power. I have videos on the inverter. My favorite video is testing the overloading capacity, because It's the best I've ever tested: ua-cam.com/video/nCV1OUrcAaw/v-deo.htmlsi=rsaoG1UQ0sYt0pA0
@DavidPozEnergy I have an existing 14.5kw micro inverter PV system and trying to add whole house backup/off-grid battery system. I need 70-75 kw batteries to do this for the worst case days
You may want to research a term called "AC coupling". Some inverters will allow AC coupling, and some don't. If you have this feature, then you can still use your existing solar system (with micro inverters) while the grid is down. I've tested the AC coupling feature on my Schneider and it works well. If you don't want to go Schneider, look at SMA Sunny Islands, they also do it.
@DavidPozEnergy Sol-Ark 15kW All-In-One Hybrid Inverter, can it just $7k. And well it is a lot to spend on just the inverter with no one I trust is speaking about it.
Personally, I'm not a fan of the Sol-Ark line of inverters. If you want those types of features, then check out this one: signaturesolar.com/eg4-18kpv-hybrid-inverter-all-in-one-solar-inverter-eg4-18kpv-12lv/?ref=4_rHcgZ9x-TiF-
note, this is an affiliate link.
After your last battery video, battery hookup ran out of stock on the 20s packs quick! And I missed out. The success of that video hurt me lol so I better jump on this deal stat!
Only jump on the deal, if this battery will work for your needs.
@@DavidPozEnergy it pretty much seems perfect for my build so I ordered 6. I used your discount- thanks
edit: boy am I glad I acted quickly: showing sold out on the website already.
Could you look into assembling a sodium ion bank? I’ve seen some of the cells out on the market
How did you wire the batteries up for 48v? I don't see anything attaching the two batteries together.
I used an orange copper busbar. It's semi-flexible and left over from a battery I took apart previously. I save spare parts for this reason. I show it in the chapter installing the BMS.
@@DavidPozEnergy Oh, I see it now. Somehow I missed it :)
Hi. Thanks for your service and all information sharing with us. This BMS can configure in close loop with Schnaider? Thanks
I think so, but I haven't tested it. I have a video setting up closed loop with a similar BMS to the Schneider Insight home. The process might be the same, but you would have to confirm with Orient Power. Like I said, I haven't tested this "DIY BMS" with Schneider. ua-cam.com/video/qs2gE2wR3ZA/v-deo.htmlsi=9TyCDVHETOtc_8Ac
Cool video
If the battery cell capacity is around 280AH, it means it can provide higher current output capacity. Using a 100A BMS may result in a lower current, 200A BMS would be faster.
Maybe use a NEEY active balancer
HOWdy D-P, ...
Thanks = neat DIY-BMS ! ...
COOP ...
the WiSeNhEiMeR from Richmond, INDIANA
...
Yes video.👍⚡🔋💡
Is there anything like Battery Hookup on the west coast? The freight from PA is insane to out here in Oregon.
how many kwh you need?
Thank you for posting these info / how-to's! I learn alot (and still learning).
I have a wood shop that I would love to make 'off grid' that could take advantage of the sun and wind in my location.
Out of curiosity, have you written a 'how to' in building, installing an 'off grid' system that incorporates solar panels and battery systems? Or is there a book you'd recommend, if not a series of books?
I have not written a book. I've read dozens of books on the subject, but I don't recommend any of them. My favorite series to recommend is a 6-part video series from Alt-E: www.altestore.com/diy-solar-resources/off-grid-solar-system-design-video-series/
Thank you! Great video! What's the range of age of the batteries?
Good questions
You may be costing me some money with this video.
I thought we were friends!! :D
LOL
I may have missed this in your previous videos, but have you done an estimate on how much battery you need to be totally off grid? I realize there are many ways to skin that cat, how much power you generate in winter, etc, but a case study does wonders for understanding.
Thanks for the video idea. I'll add it to my list of future videos.
7:42 What's that device (with aluminium fins) on the floor?
That is a battery charger, specifically for LiFePO4. That particular model is not sold, but very similar ones are available. These days, I use the "Chargverter" all the time:
signaturesolar.com/eg4-chargeverter-gc-48v-100a-battery-charger-5120w-output-240-120v-input/?ref=4_rHcgZ9x-TiF-
What server rack is this? What's the depth? I have those CATL modules too and I like that they fit in there!
It says "APC Infrastruxure" on it. I'm not a computer guy, so I really don't know how to tell one thing or another. I bought it from my local recycling center for $75. The outside dimensions are 23W, 42D, 82H
Holy shit havent been on your channel in a couple years, i had to click on the thumb nail because it looked nothing like you lol
Thanks for the test and giving me more options for DIY builds! My motorhome is already set up as 24vdc with two 3kw Growatts. Could I use the Jakiper bms and just change its parameters to 24vdv pack settings?
No. The BMS is 48V only. Battery Hookup sells 24V BMSs. Select "8s LiFePO4" from the dropdown list: batteryhookup.com/products/12v-lifepo4-smart-bms-w-low-temp-cutoff?_pos=6&_sid=be404606b&_ss=r&variant=37389087506594
Although, just now when I snagged the URL for you I see they are sold out. They usually restock quickly, but you could call and ask when they might have more.
Thanks for the video ! Do you know if we can you put multiple DIY BMS modules (16S) in serie (for a 600V inverter) ?
No, these BMSs are not rated for series connections.
Ok thank you !@@DavidPozEnergy
I always wanted to see what the mounting hardware looked like to put these types of cells in a car.
Hi David. Do you have a link for that orange flexible busbar you used for connecting between the two 8s packs? Thanks!
No, sorry. It was something I had from another battery I took apart. If I didn't have that I'd probably use a 1/0 wire with a ring terminal crimped on both ends.
Many thanks!
I see jakiper also sells a 230 ah server rack battery. Have u asked if they will sell the front panel of that model? Better breaker and I like the terminal set-up a lot more. For safety I assume u will parallel these once hooked up to your system. Whats the Max wire lug u can get on terminals?
I don't know if they plan to bring more BMS options to the market.
I was able to fit a 1/0 ring terminal, but it was very snug.
Hi William, you can also choose to purchase our 230Ah battery directly.
Where did you get the batteries
What size battery cable can you connect to the Jakiper BMS? Looked on the web site link but don't see it mentioned.
I was able to squeeze a 1/0 ring terminal in there, but just barely.
@@DavidPozEnergy Thanks
Than you David. Good video. Question: Does the Jakiper BMS setup work with Schneider xw pro. Is SoC available? Also, what base are you using to place the batteries?
good question, david has schneider XW PRO
Hi! How is the plywood mounted to the server rack? Thanks
I used 2" angle iron as shelf brackets.
Thanks!
This is all very intriguing, however where do you start if you don't have an electrical engineering degree? I love the DIY aspect, but it feels like this is over my head.
Begin with what your goal is. My goal is to power my house and garage, year-round, off grid. However, you might have a smaller goal in mind. My very first solar project was to have one LED light bulb on, and charge my cell phone.
There is a great video series that I recommend. It's 6 parts and worth the time to go through them all: www.altestore.com/diy-solar-resources/off-grid-solar-system-design-video-series/
Thats a really good price from battery hookup but i simply dont need that much capacity. Great video though
Hi David, do you happen to know where these modules where used? EV cars?
I'm told an "Industrial back-up"
Thank you
Hi David, do you happen to know the dimensions of the 8s module?
Link is not working says page not found on the batteries
What would we need if we live in a country with 240v?
You need to put a good active balancer on those packs, (NEEY) especially with the studs on those cells, it would be simple to install, or the JK BMS with 2 amp active balancer..A passive balancer will never get those under control in the long run..Communication really isn't important, a smart shunt and the bluetooth app with the JK BMS is really more than enough..I don't even have a shunt for my different two 16s 48 volt packs..It's fine...I'm still building CATL packs I got from Battery Hookup, and I have 16 280 Ah Eve cells, but I'm getting there..Everyday somethings showing up, only need a few more pieces of the puzzle..
I tested an active balancer a few years back and it made my pack worse. I removed it. There are more than one way to build a battery pack.
@@DavidPozEnergy Ya, you can't leave them on all the time..Only when the pack finishes charging and is settling into it's regular resting voltage..And then they work like a charm...I charge to 3.45 a cell which is 55.2 volts, and that is when the balancer kicks in, it stays on for an hour until the voltage is resting at 3.35 a cell or 53.6 and the difference between the cells is 3 to 5 millivolts...My buddy hooked me up with that system, and he said he learned it from someone who tests packs on the internet..Works very good..Even on used cells..But, if you leave the balancer on all the time, it makes the situation worse, and I can confirm that, because I tried it on two different packs..
Just wondering what type of thread and size the nylon nuts are for the cell terminals (M10, 7/16") and what size bolt (M12, 3/8") and thread were the main battery terminals? I'm putting together my batteries now with the DIY faceplates. You would save me some time ordering the incorrect type. Look forward to your response. Cheers
I'm sorry, I don't remember what they were. I can tell you that they were all metric. I use this tool for finding threads: amzn.to/4j1MZmm
I am curious, if having that one BMS wire that was 6 inches longer to reach one cell will affect it in any way?
Yes and no. Technically speaking, if we are using NASA grade lab equipment, then the answer is "yes". But, in the day-to-day cycling of the battery, "no". When I tear down pre-built batteries, they have different length wires. As you could probably tell, I left the wires the same length where I could.
@@DavidPozEnergy
Thanks for the answer, as I figured a BMS would be critical. 🖖
A minuscule amount of current passes through those "sense" wires, so extending their length (reasonably) should make an un-measurable difference.
Hello Dave, Have you gotten your hands on the Battery hook up 51.8v 252ah 13.05kWh 14s ESS Battery Module with BMS battery for sale. Looks tempting, would love to know if we can actually use the bms and RS485, Can, and RS232 it comes with our inverters. Maybe this can be your next video. If anyone can figure it out it would be you.😂
Hi fredlo6935, I have not tested that battery. Looks very nice.
Your discount codes aren't working for Orient Power. The 8% isn't too surprising since it was limited time, but the 5% isn't working either
So glad I found this video, I had no idea this diy bms was available. That will actually let me make a professional looking battery that is nicely enclosed
I asked them about it. If an item is already on sale (example: early black Friday) then you can't double up the discount. Sorry about that.
Please still use the affiliate link, as it's how I can continue to make these videos.
Would you like to do a capacity testing on our brand new HSEV EVE 280K cells? We have tested most of them are over 300ah! We hope you can do a test for them too…
@GobelPowerBattery, Send them to me! I'll test 16 or 32 of them! lol
Where did you purchase thr xatl battery
I’ll never be able this afford anything like this. I’m investing in candles, books, board games and food. 😂
You should emphasize that shipping costs are heart-stopping. $500-700 to western NV.
Shipping is something to consider for sure. Sounds like shipping would add $200-$400 more for you, compared to what I paid. That adds $14-$28 more per kWh if you are buying 2 modules (14kWh). Or, $2-$4 more per kWh if buying 98kWh.
Signature Solar is selling EG4 server batteries brand new for $195 per KWh currently with no DIY/wiring/BMS currently. I want to go that way but the diy is so attractive tbh, think i may go this way instead
There are pros and cons to both ways. I bought a rack of EG4 batteries about 2 years ago and it's still working well. Here is my affiliate link to Signature Solar if you decide to go that way, you would be helping the channel: signaturesolar.com/?ref=4_rHcgZ9x-TiF-
Have you ever built a 36 volt battery for a golf cart ? I'd like to build a 36 volt lithium battery pack to replace six 6 a volt Trojan lead acid batteries. Great videos, thank !
I replaced the lead acid batteries in my golf cart (36V) with a 36V lithium module I bought from Battery Hookup. batteryhookup.com/products/36v-48ah-1776wh-spim08hp-36v-power-module
Add a BMS, at least to control charging.
Discount code: DAVIDPOZ
Do you recommend that or building one ? I'm trying to save some $$$ but build something that will hold up a function well. Thanks for responding sir.
What BMS would you recommend ?
But, How many years will they last. My electric bill is around 300/month x 12 thats 3600 a yearish its less in the Winter because I live in FL. spending 12k plus idk how much in panels to charge these guys, everything would have to last 5-7 years just to recoup my costs. Do you think these batteries being used daily to power a home could or would last that long?
He David
How long will they last ???
2 - 6K cycles or 10 - 20 years depending on temperature and cycle depth. Midpoint 3 cents per kWh cycled 4x cheaper than grid.
Does the BMS come with active balancer? Would it make a difference?
The BMS has a balance function built in. This BMS uses resistors for balancing, which is usually referred to as "passive balancing". The BMS will eventually balance the cells on it's own, but I sped up the process with an I-charger.
Where did you get the server rack to fit the CATL packs? I got 12 of these and need to find a sturdy rack.
My local recycling center. I bought it for $75. You can also search on craigslist and Facebook Marketplace. Use search "Server Rack" and "server cabinet". The CATL module was about 1/8" too wide, so I notched the back rail to slide it in.
Is there a way to do top balancing and capacity test if I don't have all those tools?
The BMS will eventually top-balance the cells on it's own. I used the I-charger to speed up the process.
Another alternative I've done sometimes. Get a water heating element, connect two wires, and drop it in a bucket of water. When you are charging the whole battery, and notice one cell is higher than the rest, put the two leads on just that cell and it will burn off some of the power.
Another alternative is to get a cheap hobby charger, like this $40 option: amzn.to/3Zhlbkx which comes with a accessories. Charge each cell one at a time up to 3.65V.
David, what's the size of the bolts in positive and negative ends? I do have these but there's no bolts included and one positive bus bar end been cut.
Do you have a link or contact for the jakiper DIY bms and faceplate?
Yes. I linked to it in the description along with the coupon code. The company is Orient Power.
how many kWh do you now store, David?
Not all the batteries are in play yet, but once they are, it should be 100kWh. At least, that's been my goal for awhile.
@@DavidPozEnergy i have about 22.5 (rated), capacity not tester. Still on grid
Would be nice that Orient power sells an entire kit instead of just the bms and front cover
There is already a popular open source project called DIYBMS that's been around for years, and is used with cells like these. This will lead to confusion.
Really? That's awesome there is another BMS option. I hope there is not confusion, that would stink. Can you send me a link for the "DIYBMS" so I can check it out?
Stuart Pittaway's diyBMS
Thank you.
I'd get a couple of these if they were available in Europe.
Also, with a bit of creativity, could parallel up the batteries and cells and use 1 BMS for 2 or more sets, but balancing current would proportionately decrease per cell.
Sure you can! You can parallel each identical battery with the same age and capacity.
If you are looking for best price in Europe, use grade A Fogstar from UK or choose German cells.
Another good company with good price in UK, is Roamer. You can get 48v 5.4kwh battery for 1.8k with incredible good warranty 10 years which is not easy to find anywhere.
Orient Power have battery in Germany, Romania, Netherlands.
We can't even get them here in America so don't even worry about it 😂😂
When u say “top balanced for 3 days” - does that mean u floated the cells at 3.65 for 3 days?
I charged the pack at a low Amp rating (I got my charger down to 2A) until one cell hit 3.65V and the BMS shut off. This allowed the balance to be on for a couple hours while charging. I then turned off the charger and let it sit overnight. During the night it continued balancing until the cells fell below the programmed threshold. The next day I would discharge a couple Ah out of the pack. Then I'd turn on the charger again at a low current until the BMS once again shut off. I could do about 2 or 3 of these cycles per day. And I did this process for 3 days.
Dude ur the best thank u for the thorough explanation!!
Your welcome. There are many ways to top balance. Sometimes I just use my i-charger. Sometimes I charge each cell individually. If the cells are not series connected, then I can parallel all of them together. Just depends on the situation I'm in at the time.