Cheapest 48 volt LiFePO4 Battery, Pre-Built with BMS, Testing and Review, Gyll from Signature Solar

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This is the cheapest pre-built battery for 48 volt off grid powerwalls. At only $300/kwh nothing else comes close. This is a LiFePO4 battery, pre-built from the factory with a BMS, circuit breaker, all in a beautiful case. It's ready to go to work with your powerwall and off grid solar system. No need to add a BMS. It's rated for nominal 51.2v so it works with normal 48v equipment (inverters and MPPT charge controllers). This is the Gyll brand sold by Signature Solar. It's 100ah, 5,120wh. That's over 5.1kwh per battery!
Retail price as of this video is $1,500, which is less than $300/kwh.
Update: There is no longer a discount code available.
In the video I do a full capacity test. I test the BMS for over-current protection, and over-voltage protection. Finally I connect the battery to my computer to see what can be read.
Overall, I'm very impressed with the build quality of this battery. I think it's the cheapest at $300/kwh. I haven't seen any other 48v LiFePO4 batteries (pre-built with BMS) come close to this price point.
Amazon Affiliate Links:
Resistor used to pre-charge inverter: amzn.to/30lgg4c
“As an Amazon Associate I earn from qualifying purchases.”
Affiliate Links:
Growatt 5000W Inverter with 450V MPPT Charge Controller 5000ES: signaturesolar.com/growatt-48...
Auto-Transformer, 5000ES: signaturesolar.com/growatt-5k...
EG4 Battery, 48V, 100Ah, 5.12kWh, LiFePO4, Server Rack design: signaturesolar.com/shop-all/b...
Waterproof EG4 battery: 48V LiFePO4 Lithium Battery with Bluetooth, EG4 Brand: signaturesolar.com/eg4-wp-lit...
Disclaimer:
My videos are in no way intended to be instructional "how-to" lessons. I am simply documenting my project for informational purposes. Property damage, personal injury, or death may result, even when following manufacturer's instructions. I cannot be held liable for such damage or injury. It is YOUR OBLIGATION to ensure that you are complying with any local and federal laws as well as code and permit requirements.
David Poz, LLC

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5 мар 2021

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Комментарии : 1,9 тыс.

@heart4Pahoa 3 года назад

Love the server rack usage. As an IT guy, I could mount my home power storage, server, switch and patch panels all in a single rack in my garage. Geeking out hard on this one. Nice bit of kit, thank you for taking the time to review and test this.

@shadowtheimpure 3 года назад

You can combine that with a rackmount 48 volt inverter and you've got it made.

@riccardoz2953 3 года назад

as IT guy u should know that u have to keeep AWAY batttery banks from data banks. risk of fire pretty high on battery banks \ ups

@shadowtheimpure 3 года назад

@@riccardoz2953 No higher than any other UPS battery, and basically every rack I've ever seen has a UPS in the bottom.

@FrozenHaxor 3 года назад

@@riccardoz2953 Yeah, people lack basic common sense these days.

@edguantero9188 3 года назад

@@riccardoz2953 yeah so true. If i gonna have it i will have a new rack just for solar setup keep it away for my internal network and storage. 😁😁😁

@caddyzig 3 года назад

Wow, very cool! Thanks for reviewing these. Looking forward to seeing the whole rack. That would sure be nice to have.

@natewho7261 2 года назад

This is truly a terrific presenter and a first class EDUCATOR. I love the integrity and style the most out of every single one of the competition. Safety, instruction with information on why you do things a certain way through a step by step technique. No nonsense approach into Facts along with a Pro's Opinion A+!

@DavidPozEnergy 2 года назад

Thank you, that means a lot.

@davidgimellihemme5992 3 года назад

I just stumbled across your channel. Too bad you were not around when I was doing solar when I was younger. I might get back into it though! Love the content!

@zekeboz5533 3 года назад

Nice find David. It is good to highlight these other options to drive competition and hopefully bring prices down for already assembled battery bank options.

@TrackGeeks 3 года назад

Hopefully a glimpse at the future in regards to price vs capacity. A solid step in the right direction.

@incognitotorpedo42 3 года назад

Tesla has talked about getting the price per kWh at the cell level down to the mid fifties (USD). I presume that's LFP, but don't know for sure. At any rate, that suggests there's a lot of room for home battery prices to fall.

@terryctane1617 2 года назад

I just came across this fine u tube presentation.first of all Dave Poz is an excellent teacher,I love his sensible and no music and NO WAZZ UP BS .

@timber1111 3 года назад

Congrats David!!! You made SignatureSolar sell out of these!!! Hope they cut you a nice check for all the great work you do!

@hoofheartedicemelted296 2 года назад

I really appreciate you explaining the price up front. I hate it when people don't quote the price. This is a pretty good battery, I'm going to consider purchasing one immediately after Christmas. Thank you David.

@spacehitchhiker4264 3 года назад

Great Scott had a good video on making a soft-start for inverters that automatically bypasses the resistor

@GLInick 2 года назад

@Mike Sims go back to the 7' mark

@gabrysur 2 года назад

Thanks for this video! I now own one of this batteries, I'm using it on my remote off grid cabin. I came back to the video because y want to connect the battery to my computer and I think you are the only one that shows how. Also I like that you showed your mistakes, now I know what to be careful with.

@buffintl 2 года назад

Man this is crazy, I remember when your channel was around 20k. Congrats on the growth of your chanel over the last 2 years. I finally got my solar shed up and running lol.

@DavidPozEnergy 2 года назад

Thank you. And Thanks for being a long-time subscriber.

@NeilBlanchard 3 года назад

David, this is an excellent review - you have my attention. This price is really good. I am looking forward to the next part. I think the key thin for many folks will be to use this as a home battery in a grid connected solar array, that lets you buffer your "own" power overnight - and if/when the grid goes down.

@DavidPozEnergy 3 года назад

Yeah, I haven't been able to find a better price point for a pre-built 48v battery with BMS and with circuit breaker. I don't have time of use rates where I live, but I can see that being a big benefit for many viewers. Thanks for watching.

@TheCruisinCrew 3 года назад

Fantastic, exactly what I've been looking for... I think these will go into our next build! :)

@arowberry Год назад

Super presentation! I understood it well even at 2x speed. I don't know how yet, but I am confident that this may be part of the answer that I've been looking for a power system for my van camper. Thanks!

@SuperJamster1 3 года назад

Thank you David, I'm about a year away from putting in a off grid system, and or a backup powerwall. Finally something that doesn't say T--la, and performs right out of the box. Thank you.

@randybobandy9828 Год назад

T--la? What?

@DCGULL01 3 года назад

Wow- that's impressive! I LOVE the rack system, the compact 100Lbs. battery with breaker built in, and the communication capabilities. Looking at your 'power wall' from years of building batteries from whatevah was available- it's great but... Imagine having 6 in a rack, taking up virtually no space (well, in comparison David!), checking out cell status while eating a microwave dinner on top of the rack!!! (Are you feeling the convenience of this thing? I know I am!). Breaker, SoC, Pos. & Neg. are far apart for safety, sealed container, 103% of promised energy- what's NOT to love? It's too bad that the form factor doesn't work well for RV's, but- these folks may just consider that market as well!!! I really like this non DIY battery at $300/Kwh!!!

@jimmyg6215 3 года назад

Hi David from your fellow New Englander. Great video. I own 3 of these bought them last year. So far so good. I also use a pc to monitor them. The dip switches are kind of backwards from the manual, but u can figure it out to assign each pack a unique id. Then it will show all the packs once u use that green cable to patch each serial connection of each pack. I just assigned them starting with Id 1 and worked my way up to id3. Good luck on your build, cannot wait till next video. I think I may be ordering another pack and the rack for my cabin setup.

@jamesbsa6450 2 года назад

@Signature Solar How is your precharge resistor wired? Is in constantly inline and adding resistance to the output terminal?

@PasanKarunanayake 3 года назад

This video recommended by RU-vid and I'm very happy about that. Superb experiment.

@JPHER217 3 года назад

Thanks for video David, these things always intresting to watch. Keep it up my man.

@ai6mk897 3 года назад

What an awesome battery. The construction quality looks very professional.

@J7innovation 3 года назад

But they are not for sale 😂

@Donatus11 3 года назад

They don’t have those batteries anymore.

@_a1001 3 года назад

Me: “I have enough batteries.” David: “check out this battery!” Me: “... well another one won’t hurt”

@DavidPozEnergy 3 года назад

Yes, this. LOL. I feel the same way when I see a new battery out there.

@a.w.thompson4001 3 года назад

And we're so glad that you do!

@jacquesb5248 3 года назад

enough batteries ? you can never have enough

@joepah51 3 года назад

you might be on to something.

@hillbillyintheasia6122 3 года назад

@@DavidPozEnergy 2021 new 5kwh 48V 100ah LiFePO4 Lithium Iron Battery Pack for BTS Solar Energy Storage Power Wall Battery $1,306.54 alot 6 x total over 7k call the cheap unless make 100k a year perfamily.

@henmich Год назад

Pretty impressive battery there... These items may finally push me over the edge into a solar system.

@carson3210 3 года назад

David, you sold me on this with your review last night. Ordered. Thank you!

@DavidPozEnergy 3 года назад

Your welcome. And thanks for watching and ordering. I hope you saved 5% with the discount code DAVIDPOZ

@notsoshortbus1651 3 года назад

@@DavidPozEnergy I got the discount and bought 2 of them came in 5 days, hey Dave I got the 12 volt version and the pic on there web site shows a breaker and mine has none

@LumenCache 3 года назад

The 58.2V peak during charging is perfect! Love the price too. Thanks for the review and I'll definitely reach out. -dc

@trevortrevortsr2 3 года назад

Looks very impressive - After watching you detailed testing & tear down I went to their site and saw they had 24V & 12v versions with the same capacity even cheaper - the 12v would work brilliant in my little RV - Its so tempting : )

@whatyagotder 3 года назад

Was the 24v cheaper? Same price now.

@joshuacaudell7356 2 года назад

How does this do with rattling inside. Want to do one in a off grid bus

@randybobandy9828 Год назад

@@joshuacaudell7356 rattling? I highly doubt these rack batteries rattle.

@JimNichols 3 года назад

Everyone has their kink and that is cool but I did some hard math on this system you built $1500 a piece for the batteries X 6, inverters and MPPT charge controllers, 6 X 300 w solar arrays all adds up to a hefty sum. Where I live there is an import fee added, so even more of a hefty sum. I run split unit inverters for cooling and my electric bill on grid is about $60 a month and the power company is not set up to accept reverse current flow into their system. So it all around is just a nope, can never do that for me. BUT: your system is amazing and seems to be well thought out, well engineered and well built, you have a slow, easy voice that you use to explain things well and thoroughly and I enjoyed the content. Thanks for the ride along showing your system and the time and effort put into this video.

@johntatman9168 3 года назад

I wish I could have seen this a week ago. I just ordered cells and bms to build my own. This certainly simplifies the precess and this battery looks awesome. Thanks for the review. I will still be buying some.

@DavidPozEnergy 3 года назад

Your welcome. You can always parallel your DIY build with one of these. So long as your DIY build is also 16s LiFePO4.

@johntatman9168 3 года назад

@@DavidPozEnergy I was thinking the same thing. I was actually planning a 24V system but now I think I'll go 48v in order to do this.

@DavidPozEnergy 3 года назад

Good call. 48v will make the overall system more efficient, and future compatible.

@sephjfox 3 года назад

I really dig the testing methods

@Bin216 3 года назад

RS485 is a serial standard used in a lot of industrial equipment. There isn’t a preferred standard physical connector but screw terminals are very common. In this case the RJ45 socket is just a convenient commonly available connector. As there are 2 connectors on the front of the unit I would expect you would be daisy chaining from one unit to the next (with screw terminals you would usually daisy chain from just a single pair of terminals).

@mcdevious2229 3 года назад

Nice. It's good to see someone experimenting with electrical circuits.

@IamDerick 2 года назад

Thanks I was curious about this model. Nice to see inside and get a look at the software , features and your testing. Cheers.

@junkerzn7312 3 года назад

Something like this is exactly what I was looking for. Hopefully more vendors will follow suit and hopefully the maker won't cheap-out on components once they start to get sales volume like so many others have. -Matt

@besearchingforwisdom6267 3 года назад

@Signature Solar It's an impressive looking build from this side of the camera, David does an excellent job and your reply was perfect. I'll look into your site as I'm interested in a marine environment use with recharging via a generator and shore power. Thank you for quality

@praetorianblade6490 3 года назад

@Signature Solar I need to run full off grid my 4000 sq foot home with 7 ton Mitsubishi mini splits, computers, propane tankless, propane stove, propane dryers, etc. Will these be able to handle the loads required?

@Psi-Storm 3 года назад

The Pylontech US2000C are sold for a similar price, $750-800 for a 2.4kWh 2U rack unit.

@radudorurus 3 года назад

@@Psi-Storm where? It is ~900-1100 eur anywhere I found.

@johnscarborough8425 3 года назад

@Signature Solar Electric sailboats are becoming a hot thing. How would this work in a bank of LiFePO4 batteries to power an electric motor on a boat?

@kuhrd 3 года назад

Wow, this is probably the first all-in-one unit I would actually consider buying rather than just DIYing it all myself as I have done so far.

@JasonWho 3 года назад

@@crashoverride5107 so?

@BobHannent 3 года назад

@@crashoverride5107 it's still plausible to call it DIY because it's a self-assemble system and the arrangement you use, with solar and inverters can still be DIY. This isn't a self-contained powerwall like unit, it's just a battery. Sure, it isn't a bunch of 18650s, but as he points out the price is competitive for those without tonnes of free time.

@uncleeddie5813 3 года назад

Especially when my diy's end up costing me twice as much by buying mismatched parts and blowing things up 😂

@antibodyarmy 3 года назад

@@BobHannent I personally would not call this in any way DIY. you can technically mount this on a wall (or place it on the floor)and have just 1 battery be a stand alone unit, making it basically the same thing as a powerwall, as there might be some cases(especially offgrid) where you can mount and hookup a Powerwall yourself. this does not qualify as DIY IMO, Its the same thing as buying a preconfigured rack server slapping it on a rackmount and plugging in the plugs. or buying a tv, placing it on a media center and plugging it in to the wall and cable box. sure you placed it yourself, but didn't make it yourself.

@jimbob3030 2 года назад

@@antibodyarmy It's only DIY if you customize an existing product like OCC, put some ape hangers on it and raked front end and glitter paint and then it's completely custom DIY.

@joselr146 3 года назад

Looking forward for more videos on this product. Keep up the Good Work David.

@DavidPozEnergy 3 года назад

Thanks. I'm working on it. Currently powering my house with it.

@lemagreengreen 2 года назад

These look great, the 19" rackmount is just a perfect format for these batteries.

@BobHannent 3 года назад

For your test rig, perhaps put a label over the previous correction value and mark the date you calibrated it? If you test it later and its changed you'll have a record.

@jams19641996 3 года назад

I have 4 of these batteries and Solar-Ark 12k. These batteries are absolutely great!

@d2putman 3 года назад

James, what is your PV array size and configuration?

@harvdown 3 года назад

Do they work in multiple

@MrSeth166 3 года назад

@@d2putman I hate when you ask a question and never get an answer. This is probably a scam.

@jeromepark7002 3 года назад

Yes it is a scam ....😎 You should watch his other videos ... This guy is terrific .... Almost a wizard

@dayozhu4459 3 года назад

You are very professional, the battery manufacturing process is very good.

@dave3005 3 года назад

The 24 and 48 volt Gylls are all gone. You’re a great advertising source for signaturesolar, I hope they’re paying you well!

@ChadHafer 3 года назад

@Signature Solar They still haven't arrived?

@johnpalmer5131 3 года назад

Great testing. One additional test you might want to try is a low temp cutoff test. Don’t know if you have a freezer with enough room. If not, maybe leaving the unit outside overnight would work...

@DavidPozEnergy 3 года назад

Thanks for the suggestion.

@evlhat 3 года назад

I had mine running during the big Texas freeze in my uninsulated power shed they didn’t get to the discharge temperature cut off. But they did get to the charging cutoff, one started charging at 32f and the other started at 33f.

@TrackGeeks 3 года назад

If the BMS screen is to be believed it may have heaters. David, can you verify if there are heat strips on the cells?

@ralphbell1786 2 года назад

You could undo one of the temp sensors and hold it against an ice cube or dip into glass of ice water.

@davideudy3473 Год назад

David, Hello Sir Watching a lot of your videos and wanting to ask if the Gyll battery pack would work for an enclosed trailer? It would see hot and cold weather while not in use, and wondering if the battery would last by being hot/cold while being recharged by solar….. any help would be greatly appreciated

@johnstxiii 3 года назад

Never mind I should have known you would cover it in the resource section. Thank You. Great battery gonna go put one on reserve.

@DavidPozEnergy 3 года назад

Glad you found it. Actually, after I posted Signature Solar reached out to me. Turns out there is a pre-charge resistor built into this battery (aluminum thing right next to BMS). So I didn't need to use a resistor.

@stevesimmons3563 3 года назад

Hi David, I have just put a 48 volt battery together for my 1000 watt electric bicycle. I love the battery except I can't tow it behind my bike! keep up the good work. Your safety is really good.

@neobreaker91 3 года назад

Have you considered one of those pull behind things they use for children or small animals? And put the battery in that and tow behind the bike?

@Upliftyourbrothers 2 года назад

Buy two and mount them like saddlebags on rear wheel. In a waterproof controller. You’d have. 400 mile range! Lol

@MaxMax-dq1lu 3 года назад

That looks like a great battery & @ a great price point..! I look forward 2 more videos on this... Cheers & keep up ur great work.

@MarkOfBitcoin 3 года назад

Loving all your videos, David. This product looks fantastic! Do you have a favorite website that you recommend for the calculation of what sized components (batteries, solar cells, charge controllers, etc) someone needs based on their power requirements?

@DavidPozEnergy 3 года назад

Generally, I like the resources at Alt-E. They are easy to understand. www.altestore.com/store/calculators/off_grid_calculator/

@peterkranz8711 3 года назад

I'm purchasing similar 100Ah 48V lifepo4 rack mount packs from Meritsun, that also have an ethernet port supporting SNMP management for $1440/piece.

@JRis44 2 года назад

Dang great content man. I cant wait to start my solar panel and charging bank journey someday!

@NotSoCrazyNinja 3 года назад

It's always nice to get out of a product what it was rated for, instead of the usual getting less out than rated for since many companies expect most consumers to not check.

@LithiumSolar 3 года назад

Great test. That looks like a very well-engineered battery. I cringed when you plugged that RS485 cable into your Ethernet jack. I hope your Ethernet port is ok :) I look forward to seeing the full rack setup completed.

@DavidPozEnergy 3 года назад

Thanks for watching. IDK computers well. It fit.

@wimfu 3 года назад

@@DavidPozEnergy lol @ "it fit"

@eDoc2020 3 года назад

@@DavidPozEnergy Don't worry about it too much. I've plugged USB cables into Ethernet ports before. And I _do_ know computers well.

@MrArtist7777 3 года назад

Excellent battery, thanks Dave! I think this is the best option out there as DIY'ing a battery is pretty scary, I talked to a guy the other day who DIY'd his own battery, burnt his garage and part of his house down when the battery overcharged and caught on fire. Going low-cost is great but need to be safe.

@notsoshortbus1651 3 года назад

@Signature Solar ordered the 12 volt 400ah and they haven't got a breaker

@henrydamiani1507 Год назад

David , thanks for the experiment

@rdtsvideos 2 года назад

Ordered 6 of the 24V 200Ah units a month ago. Liked it so much I ordered another 6 today. My system is 48V but the only ones in stock were the 24V. So I will run 2 of them in series for 48V. I was told the 24V and 48V are identical with the difference being the 24V is divided in the middle. Time to sell my 20 Valence U27-12XP Lithium Battery's!

@jamest.5001 3 года назад

You can use a 120v incandescent light bulb to charge caps also, 40 watt and up work great, when the glow stops, the caps are charged! Nice batteries, can they be bought individual? I think I'm still at the diy level, although the 120ah LG batteries did spoil me a LOT! Building large 18650 banks get old fast!

@samuelgilbert9734 2 года назад

"Blow out the capacitors" 😲 There is no risk of damaging the capacitors in the inverter if you hook it up directly to the battery. The question is if the internal BMS or the battery's breaker will trip. I would hope that they can handle the short high in-rush current.

@MsAlisonWunderland 2 года назад

Brilliant presentation. Wish I had the benefit of this video before I had Pylon batteries installed by a con man here in the UK.

@fy7589 3 года назад

Dude you're just going to save my life I guess. I'm going to be building a datacenter soon in the United States. And I'm kinda conservative about our budget for second backup power. I think I'ım on to something right here tho. Thanks for the amazing content! Keep on rocking!

@DavidPozEnergy 3 года назад

Your welcome. Good Luck with your data center build.

@pattimichellesheaffer103 2 года назад

Nobody seems to want to talk about "battery fade" over the cell's lifetimes, and how that interacts with the nameplate "number of cycles" a battery is supposed to yield. These are two important things you can only find out by using the battery, it seems. Maybe after 5 years it will fade to 4 kWh or even 3 kWh, depending on *how* you use it. It's well-known that if you don't use the full capacity (that is, charge it to maybe 90% and discharge to maybe 10%-15%) that you will slow down this "battery fade," and battery manufacturers will admit to this - but there doesn't seem to be good information on voltages, etc., to lengthen battery life. This is important to those of us who are trying to maximize battery lifetime in a working home solar system in island configuration.

@Flashbang_Photo 2 года назад

That sounds like regulat battery conservation to me, just like EVs and phones. I guess you can set up a system that modifies charge and discharge behavior based on SOC?

@theshepard22 2 года назад

Right right! I'm interested in this. I think there are certain parameters recommended for lifepo4s, based on the specific make and model. It's programmed into the bms and possibly the solar charge controller as well? Not sure as I haven't connected my system all together yet.

@charlesball6519 2 года назад

The G4LL LiFePower4 batteries are rated to 7000 full charge cycles (which just means it takes 7000 cycles to reach 80% of original capacity)

@weaponizedautism6199 2 года назад

Just build it bigger.

@joergreinicke5945 2 года назад

There is lots of information about it everywhere online. You just have to read it.

@tomwilliam5118 3 года назад

Will sent me your way. Great video, can this be charged solar panel and how would you connect Shore power to it to use it in an RV setting or would it be wise to use it in the RV setting

@mdnazmulislamnazmul1927 3 года назад

David poz you're battery powered plan capacity is good stronger. Nice ⚡⚡👍

@rogerherrick8323 3 года назад

Thanks to the in-depth evaluation I just bought a 12v 400ah battery for my RV installation. Thanks for efforts David.

@DavidPozEnergy 3 года назад

Cool. Did the discount work on the 12v version?

@rogerherrick8323 3 года назад

@@DavidPozEnergy Yes. And their phone sales support was outstanding.

@DavidPozEnergy 3 года назад

Thanks. First time I've done a video of one of Signature Solar products, so I appreciate the feedback.

@rogerherrick8323 3 года назад

@@DavidPozEnergy My battery came without bolts for the terminals. I am sure the thread is metric. Can you tell me the specs for that thread? Thanks.

@DavidPozEnergy 3 года назад

M6x1.0

@lnxpro 3 года назад

btw, you can daisy chain multiple of these packs to one single USB adapter. you just use small ethernet cables between each one. left port on one going to right port on the next one, left port on the second one going to right port on the third one and so on.

@PhG1961 3 года назад

That's actually a good question. RS485 is suited to run serial connections over a long distance and daisy chain should be possible. However, is it some kind of proprietary protocol/software ? Is there a web based interface available ?

@goodcitizen4587 3 года назад

dang, this battery keeps getting more awesome. I think 4 of these for $6K would be a great little 'powerwall'.

@Labeeman 3 года назад

Up to 32 devices

@bikerkiter 3 года назад

@Signature Solar will this support canbus?

@mickwolf1077 3 года назад

I thought so, I should have looked at your comment before saying the same, lol

@johncarr123 3 года назад

David, can you do a video that lays out a 5KW system using Growatt inverter and these batteries connected to grid showing how you can make a cost effective system on grid off grid. Also if possible show how we can connect a 9000 W harbor Freight generator as backup. This video done right would get over a million views. Thank you

@texasdoc68 3 года назад

Yes, Please!

@tjhayes9911 2 года назад

I third this request!

@tabbott429 2 года назад

I just bought 2 24V 200AH LiFePo batteries to replace my 12 lead acid bank ive had since 2014. What an improvement LiFePo makes!. Wired them together for 24V @400AH since I already had a 24V inverter. They charge fully even on cloudy days with 2 panels @265W each so easily as the capacity only drops 15% overnight running my refrigerator, internet modem, CCTV system. No more Lead acid for me!! Ill be adding a couple more in the future

@mwlaursen 2 года назад

I like the battery. I need to build one like it for my PowerWheel Race car. I am looking at a 48 volt system that will run a brushless motor system. I have a small atv chassis that I need to fit everything on. I was wonder about batteries, and you have shed a lots of knowledge to get me going on this part of my project.

@1BrockSawyer 3 года назад

Hey Dave! Thanks for all your hard work showing us whats up out there! I noticed in the software it mentioned heat film so I was wondering if there was a heating circuit under the battery? and if it was automated to protect in frigid environment? if so what are the temp presets and are they adjustable? Also was there a auto shut off to prevent charging in the same? Maybe use the solar vendor freezer outside to test? Hey we could just build our own from ali for 1000$ with all the bells n whistles but that is a rocking case! I like em too! Thanks, Brock in Myrtle Beach SC

@vladimirnekic3241 3 года назад

Ok, #1 - Batteries out of Stock... imagine that. #2 Signature Solar - Shame that you don't have the usb cable completed for the customer. Such a small item. Poor David had to suffer.

@dennisford2000 3 года назад

My thought exactly

@atheldown 3 года назад

Awesome as always, I may have just found my first batteries.

@maximus6884 2 года назад

Love those experiments o you did. Love the insights you gave. Im sold!

@jimmysquires5093 3 года назад

David, Take some Acetone (finger nail polish remover) and remove your old markings from your charge box. Was a really nice trick fro calibrating it!

@___Chris___ 3 года назад

Alternatives in the same price category: Pylontech (e.g. 3.3 kWh @1260€) or Sunstone (e.g. 10.2 kW @ 3290€), especially for customers in Europe, when shipping costs have to be added.

@fabiuh991 2 года назад

Too bad they are 0.5C rated

@RollinHomies 2 года назад

These complete package battery banks are awesome! Saves time and money from having to shop around for parts. Cant wait to see where batteries will be in five years. Eventually manufacturers will have to beat out the DIY’ers and they have to come down on prices do it.

@mattdiaz9360 3 года назад

Another excellent vid Dave. Glad I subscribed!

@Manatee360Phototography 3 года назад

this is a game changer!

@DavidPozEnergy 3 года назад

LOL, yeah they could have called it that and it would make more sense.

@terrya6486 3 года назад

Likes like a very nice battery pack. I wish I was rich so I could buy 80kwhs of them.

@kc7419 Год назад

After watching your videos, I am really considering going off grid… & from the rent of my properties, I am setting up a fund replacement battery unit for every 5 years… Given that I am using log burner to heat up the house & run a steam powered generator at the same time… thanks.

@ninja5672 Год назад

I know this is an old video about a battery that is probably no longer sold, but your over-load testing was a good test for any battery. It appeared the breaker is only used as a switch or was not functioning because it failed to throw at 200amps.

@AGhostInTheMachine 3 года назад

Hi David. A request: on one of these videos, can you please use an incandescent bulb instead of the resistor to pre-charge the capacitor. Would like to see that method as well. Thanks.

@DavidPozEnergy 3 года назад

Thanks for the idea.

@anjhindul 3 года назад

AHAHA, loved doing this in my electronics class!

@av1204 3 года назад

I bought 6 in the rack. A month ago. This thing is well built.

@almostoffgridgarage3485 3 года назад

I purchased 4 and a rack. Excited to test them.

@georgedrenes8143 3 года назад

6 for me too, about a month or so ago, but still waiting for the off-grid house to be finished so they're still in the boxes.

@catch22frubert 3 года назад

Looks like a really solid unit. Anybody know if it has cold temperature shutoff?

@N1CH0LAS12 3 года назад

I wish I had that kind of cash. That would be so awesome.

@WilliamRNicholsonLST-1195 3 года назад

Thanks for the great video David ! Reliable info is difficult to find & the way you present all the tech in an easy to digest way makes me feel much more confident . I have always felt like I could not trust the slick used car saleman type guys that I've seen on other channels & you may have gotten me ready for the next step of actually handing over a few bucks & joining this movement to modern self sufficiency ......

@DavidPozEnergy 3 года назад

Thank you for the kind comment. Comfort level needs to be high before spending money.

@PastorwithoutaPulpit 3 года назад

As good as that battery looks and the way it performs I truly hope they used the best binned cells they could get there hands on. I'm really looking forward to your content on how these continue to perform and any warranty information you find out. Thanks for a great video...

@Jnshaw81 3 года назад

Oh man, the secret is out on these batteries. Hopefully Signature Solar doesn’t jack prices!

@davidjames1684 3 года назад

This is a car jack. Well of course it's a car, but my name is not Jack, it's Greg, and this is my sister Marsha.

@praetorianblade6490 3 года назад

@Signature Solar You guys will make a mint if the quality is good and the prices stay as they are. I WILL get 10 at end of summer if these test well! Well done guys!!!!

@lioneldisla01 3 года назад

@Signature Solar good to hear! I plan on getting these later this year!

@SuperVstech 3 года назад

Little tip for ya David, when charging, avoid connecting the clips to the screws, try to connect directly to the terminals, or a copper or aluminum lug. Also, when you measured the Cel voltage, you measured on the screws, not on the bussbars. It is best to measure on the bussbars to avoid any steel resistance.

@Dingbat217 3 года назад

If you're measuring the internal resistance then yes, but if you're just measuring voltages with a high-ohm multimeter then the tiny additional resistance from the steel screws have no effect.

@continental_drift 2 года назад

Nice gear. Seems like a quality manufacturer with attention to detail.

@MrTurbotom1982 3 года назад

Awesome battery, Nice video as usual! 😊

@papaannefranku9693 3 года назад

So 60+kWh for less than the quote I got for 2 power walls, sounds great!

@errcoche 3 года назад

So it's about $300 per kWh and a powerwall has 13.5kWh. Pure equivalent energy capacity is going to cost you $4,500 plus shipping. They sell a cabinet for three of these at $400. Looks like you could get a nice 48 volt inverter charger for about $2k with a 6kW output 120/240. So you could get a powerwall equivalent for around $7k. If you double up to 30kWh, the inverter/charger might be another $1k and the larger cabinet an extra $100 so you would be at $12.5k . I think about the fact that you can buy a used Nissan Leaf for about $10k with a 24kWh battery in it, albeit probably a little bit degraded. Actually, an 18kWh battery pack out of a Chevy Volt costs $3k new. That's 9kWh for $1,500. It's Lithium Ion as is the battery in the Powerwall but I think it's an interesting comparison from a price perspective. The one thing that the Powerwall has is a compact floor space footprint - You can probably put them one above the other on a wall. Guess it depends on what you have, wall space and money or floor space.

@yakapo999 3 года назад

@@errcoche The volt battery cost has doubled. I’m not sure why.

@Zorlof 3 года назад

When you’re shooting 100 amps through an AWG6... it will definitely heat up. 60 amps is max permissible on 6AWG. More copper is always a good thing, less copper is a terrible thing.

@timballam3675 2 года назад

100% 25mm for 100Amps 16mm for 60Amps

@deang5622 Год назад

@@timballam3675 Let's get the units right shall we? It's not 16mm, it's an area we are talking here, it's 16mm2 (or 16mm^2). = 16 mm squared. mm is a distance and not a cross sectional area. Which is why the other poster is getting confused.

@RodneySolarCircuits 3 года назад

Great Job. I bought my 12k inverter from Signature Solar. I really wish mine had that 480v mppt.

@MarkSpencerAZ 3 года назад

Thanks David! Considering upgrading our super -C RV to a 24 volt inverter charger setup. One of these batteries would be more than enough in the 24 volt version. Just concerned that I will lose the charging ability from the truck chassis system. Probably not a big deal since I'm going to be throwing about 800 watts of solar on the roof.

@robertallenmcdowell 3 года назад

I know the price is good but, for $1500 a correctly pre-made cable to connect to my PC is not too much to ask.

@juri14111996 3 года назад

no. a lot of people already have a usb to serial converter with the correct cable. having a standard usb to serial converter is great, you can use it for other devices to.

@smarouchoc7300 Год назад

Actually, yes, since they used a serial port. That's only really useful for enterprise or cloud - there have not been standard serial ports on consumer laptops for a decade or more. Univeral Serial Bus (USB) would have been ok - the jank solution they include is NOT standard USB. The real question I have is, why not wifi AND/or Ethernet? Or at worst Bluetooth? That is what I would expect from a pro-sumer product. Sure, connect the devices together via serial over an RJ45 Cable so they can talk to one another. But these really should communicate either via Ethernet or wifi. Or better yet, both.

@pmbdk 6 месяцев назад

They use a serial rs485 which is perfect for this. When you buy 20 of these you dont want to have 20 usb cables or bluetoth or any other crap. Just a single rs485 where you can daisychain each unit and be able to communicate 1000 meters away. On a consumer product the use of RJ45 is probably not a good idea tho.

@E-BikingAdventures 3 года назад

I think they grouped those temps sensors in pairs because one might be a low temp and the other a high temp.

@alext8828 3 года назад

That seems plausible.

@TopEndSpoonie 3 года назад

or, it could be averaging between the two for better accuracy, or redundancy in case of probe failure.

@guygrotke7476 3 года назад

That seems pretty unlikely. Temperature sensor chips are around $1 each and they can measure temperatures over the range of -40 C to +125 C.

@EricLDunn 3 года назад

Seems really well packaged and thought out. Need rack mount options for all the other required components (Inverter, charger, module for monitoring and connection to network or wifi, ...)

@engineer323 3 года назад

Hi David, my understanding is that the battery terminals are designed to be mounted in a rack with a flat copper bus without cuts between the individual cells. you can take 2 tires, a couple of feet long and parallelize all the batteries, about 1/2 inch wide and 1/8 thick. I propose to insulate the tires with a heat-shrinkable tube in their entire length and remove the insulation in places of contact with the battery. this is not a guide to action, these are my thoughts, as I would have done) Thank you for the interesting videos, success in everything!

@leputube 3 года назад

Thanks Roman, great find, now the terminals design make sense. And I agree with insulating the copper bars completely except at the terminals!

@HectorDiabolucus 3 года назад

I like the concept, but I have some issues. They should provide the right connector for the comms package. The circuit breaker does not provide over current protection. And the cells are only rated for 7000 cycles. Newer cells have up to 20,000 cycles. This is why this unit is only warranted for 5 years. So when comparing price you should take that into account. Update: after reading the specs. you may not have run the over current test long enough.

@leputube 3 года назад

LFP typical cycle life at 80% DOD is 6000-9000 cycles. Maybe you are thinking about LTO batteries at 20k cycles. Gyll uses cells from Jiangxi Ganfeng which is one of larger and reputable "mine to cell" manufactures.

@guygrotke7476 3 года назад

The real life limit in most power electronics is the electrolytic capacitors. If you look at cycle ratings on Digikey, they are typically horrible!

@mikemcshane816 3 года назад

Unfortunately the owner of Signature Solar never returns phone calls. Biggest flake... Worst customer service I have ever worked with as well.

@omerzaidhussain1751 2 года назад

Thank you for sharing this video, really informative , the battery is also with a reasonable price.

@samsonite8017 3 года назад

Ha, to push the breaker on with a stick, that's funny! I probably would've used a stick too, you just never know if it's gonna blow up in your face hehe... Nice review, thanks for taking the time to make this video!

@symtron 3 года назад

No need to damage your hands if it were to fault...good video. Wondering about the rest of the circuit for this battery bank....

@HighTechLab 3 года назад

Except James Showalter doesn't pick up the phone when you call him! Their product is a great idea but their company owner really should return his calls.

@eyeswideshut2800 3 года назад

Good to know

@joshg1244 3 года назад

I would love to see some abuse testing on this one

@richardshultz6834 3 года назад

He answered my call, talked my ear off.

@eliotmansfield 3 года назад

It’s RS485 which is a an industrial serial protocol - other people’s ethernet patch cables wont necessarily use the same colours - so you need to make sure you are connecting to the correct pin on the rj45 connector rather than assume a particular wire colour. TBH bit crap they don’t provide suitable cable, given they provide the rs485 to usb dongle

@gabiold 3 года назад

There are 2 standard ethernet wirings, TIA 568A and TIA 568B. The difference is that the orange and green pairs are swapped, but the blues and browns are in the same location for both. So the brown wire most likely should work with any ethernet cable that seen the standard remotely. 😉 But I agree, the pinout is the reference, not the wire color - they should have provided a dongle with a jack receptacle.

@chazbarclay 3 года назад

This is how I built my modules for a 48v setup. I designed a server chassis with Protocase and they did the fabrication. Using batterybackup's 32650s. My first 2 were for a van and I have a 200kwh bank planned when my house is done being built. Not sure if I'll use the same cells but we'll see.