Constant QC problems from Big Battery for multiple years now. They are not a new company. Failed to put low temp charging protection on their recent packs. Labeled 3 kWh BYD packs as 4-5kWh packs. They say sorry everytime, and constantly assure us youtubers that everything is A-ok, but these issues keep happening. And these issues that pop up are not acceptable. It drives me nuts how they are still sending out packs with problems. Thanks for the review btw. Very useful info as always. You are about to hit 100K!!! :)
Finally heard back from big battery about the issues I was having with my on/off switch not working and always being on and the battery got down to 5.6v on the lcd display, they asked if it took a charge and told me I shouldn't be turning it off unless I'm putting it into storage for a long period of time.
Thanks very much. Residing in Puerto Rico means I am reluctant to geta battery that I may have to pay the high shipping cost to return the unit if it does not work. So sad - because I really wanted a Big Battery. (either the 5.2 or 6.0 kwh)
Thanks to your videos, I opened the batteries my son-in-law purchased from Big Battery and found similar problems with 2 of them and another potential problem with another that could have caused a problem, had I not fixed it. Even though they state that they warranty the battery, they don't pay for return shipping, which is not inexpensive. I was going to purchase two of their 48V PLBR models but after watching your video, checking his batteries and reading Will Prowse's comment, I am going with GyLL's
I’ve had the wolf battery for about a month now, and I’ve had problems with the bms. When it triggers the low voltage disconnect, my battery will not turn back on at all unless I open the top and run a jump cable from one side of the bms to the other, essentially bypassing the bms for a few seconds. Once done, the bms resets and everything functions normally. I’ve only had the battery voltage that low 3 times, but this happens every time.
This is fairly normal behavior for most BMS. Mine did the same thing. The BMS will turn back on once you connect a charger. If your inverter or charger is one of those that won't start without a battery, then you have to do the jumper thing. It's annoying... but many of the batteries that I've tested or built with small BMS do the same thing.
I bought one of these batteries a few months ago, everything seemed find, but after I connected my inverter/charger to it, the LCD no longer turns off, and it makes me wonder if the battery is even disconnecting. I went out the other morning and the LCD display was reading 5.6V even with the battery button off. Shouldn't the BMS have kept it from getting that low? I did get a charge on it but not sure about the BMS, when I emailed big battery the only reply i got was to sign up for their newsletter and still haven't heard anything else back.
I'm looking to buy about 10kW in a 24V configuration in the next few months and Big Battery is on the top of my list currently for the form factor, energy density and price. I was planning on going with the the Hawk 24V MAX, but this is for a mobile system and I am a bit concerned about them since it's been reported that they might need to be laid down flat on their back to avoid issues with mechanical vibration causing damage and electrolyte leakage. That made me consider these since these cells seem better engineered for a mobile application where vibration will be present and I could stand them up as intended, which is preferable as is it makes better use of space even if I'd need three of them to get 9kW. But honestly, QC issues are very concerning given that the customer is responsible for return shipping after 30 days. So if there is a QC issue that doesn't present for 30 days I'm on the hook for (possibly many?) hundreds of dollars of shipping and weeks or even a month or more of returning, waiting, arranging shipment. This means you MUST disassemble and inspect the battery if you don't want to be liable for that. If youtubers are having these issues consistently it's pretty much guaranteed that most customers will.
Those start out as a 13s battery and they cut it up into 3 Of the 1s goes back to make 14s for a (low end voltage) 48v pack, but since lfp is so flat it is above the voltage cutoff of most inverters and works. 4s goes to make one of the battery evo 120ah packs...same form factor as an owl but way cheaper. 8s goes to the husky that you have.
The only fuse that can be used with lithium is a Class T fuse or equivalent or greater. Those ANL fuses don't have a high enough ampere interrupt capacity (AIC), the current can arc over the blown fuse
@@LithiumSolar mega fuses and Ani fuses also don't have a high enough ampere interrupt capacity. I think a mega fuse is around 2000 amps, believe it or not lithium iron phosphate can push out 13,000 amps or higher I've heard. So it's still not sufficient
48v pack will be too heavy but that would be my choice if I buy one. I also prefer 1p rather than 8p for a battery pack since it will be more easy to balance and identify bad cells. Thanks for the information.
The smaller and lighter Gen-2 Badger 48v packs aren't real heavy (34.2 LBS). Even for a 75 year old, like me. Install 3 of them for 120Ah / 5.85kWh. The harness that shipped with my (NV vendor) order is good for 4 Badger packs (160Ah). Due to long-range bumpy truck shipping, and what seems to be limited QC, I feel like using three or four of these 48V BDGR packs might be a good idea, if one of your packs fails. You still have much of your stored power available. My 48v setup is only for Back-up in grid-down conditions. My Inverter is only 2,000W because my standard loads aren't that large. If you have only one big 48v pack and it fails during an outage, get out the gas gen?
@@neliosamch3195 I'm not sure about the internal hook ups in the Badger 48v packs, I do have a copy of the spec sheet and 50.4V is the recommended charge voltage. The BCM has 11 white wires between the Red & Black wires. Does that mean 12S config? These BCMs don't have any interface to the outside world. So, it might not be easy to locate a bad cell. I didn't pull the cover over the cell wiring, so I don't have a clue what kind cells are down there..
Are they actually laser welded? Looks like they ground down on tabs. Dont typically see that with laser welded parts. I have 2 dozen of the oem 5kw 96v a123 packs as a reference
I'm fairly certain they are laser welded. I see what you mean about looking like the tabs were ground down a bit. I assume it's just melted from the laser welding? I'm not sure... 96V would be a 30s? That's a huge module!
Their recommendations have changed since I made some of these videos and I don't think they permit series-connecting any of their batteries anymore. It's been a while since I've worked with them though. I would strongly recommend checking with them and following their instruction. They'll be the ones to know best.
Good question. They're headed in the right direction at least. LiFePO4 where significantly more expensive just a couple of years ago. That's why I began with recycled NMC/LCO cells.
@@LithiumSolar I appreciate the reply, been looking up to your channel for a while now, about to graduate from Appalachian state university this semester with a sustainable tech degree, I was considering going into the energy storage industry specifically...a follow up question if you don’t mind, do you think solid state batteries have the ability to penetrate every industry? Not just the ev space?
As I said in an earlier comment that was removed, Big Battery, Battery Evo and Tech Direct are all the same people selling used and marginally tested equipment that wont hold up over time. Personal experience with defective batteries from them has led me to this conclusion. Remove if you like but it doesn't change the facts.
@@LithiumSolar I agree. Eric is a good guy and often times quite reasonable. I have defended him before on DIY solar forum because so many people are quick to judge such a young company and say the whole company is crap because because so many people are quick to judge such a young company and say the whole company is crap because of one mistake
@@HighTechLab I disagree. Just because Eric is a good guy, doesn't mean their QC is good. They also failed to put low temp charging protection on a pack. That is just not acceptable. And just because they are a young company, does not mean they should have these problems for years. They are not a new company, and I bought Li-poly cells from tech direct (big batteries sister company) 4 years ago. I don't think it is a good excuse. It is not 1 mistake. It has been multiple mistakes, starting with mislabeling the capacity of BYD packs. And many other mistakes for multiple years. It is NOT ok.
I think you guys are way too easy on them. Imagine if you spent your hard-earned money on this pack for it to arrive unable to turn on. I never have these issues with any other companies batteries. That laser weld makes me cringe.
Eric "is going to hire a QC manager"? WHY wasthere not such a position from the beginning? Big Battery is bullshitting its customers. They must be accepting a high failure rate due to Will Prowse giving them an (unintended) boost in sales. They figure they come out ahead even with too high of a failure rate, IMO. I was going to order the 24V WOLF - LifePO4 - 120Ah - 3kWh battery, but saw this video as I was doing last minute research. Will had a leaky battery that was a health hazard as well as a Hazmat issue! He was not the only one who had this happen. Big Battery needs to go away. They sell shoddy products.
I bought 4 200 amp HR 24 volt 5s8p batteries 2 we're in small cabinets 2 in bigger cabinets and didn't fit under invertor.so I want to order another pack to add 1pack to each of the oversized cabinets no longer available..they need to figure out what to build and how to build it.batterys 3 months old should not be obsolete and no longer available not sure I would buy from them againbuyer beware they should not have these issues as a so called professional battery builder.
They build what they get parts to build with. They are repurposing used, excess production, and new old stock batteries. Not really something you can plan extended production runs around.
Hello Mike, Thank you for your review of our "BigBattery Wolf Kit". Thank you for confirming that our batteries tested as advertised. If our batteries ever do not perform as intended, we are happy to replace them (for free) per our (10) Year Warranty - No Questions Asked. It is not an easy task to build products like these in the USA as we constantly strive to build a better team, process and product. When customers buy from BigBattery, they are helping to save our environment and employ US Citizens in our factories. Side Update: The grey sticker in your video is a protective covering to protect during shipping, feel free to remove that.. We look forward to having LithiumSolar review our upcoming "Razor Power Wall" and "All-In-One R2D2" Models. I think your viewers will really like these products! - Eric Lundgren : CEO BigBattery.com
More effort in the direction of quality before quantity . The retail world is a very public place now thanks to Al Gore's internet . People are putting these things in there house and sleeping in there with them . You might ask your employees to build a battery they would put in their mother's basement to give them something to think about while working.
Eric: I almost made the mistake of buying a 24V WOLF - LifePO4 - 120Ah - 3kWh from your company! Thankfully, your order/cart showed me the wrong tax amount or I would have bought it last week! I feel I dodged a bullet. I follow Will Prowse and he gave you the benefit of the doubt, several times, yet more problems. Are you moving on to new YTs? I will check back with your company a year from now and see if you fixed the problems. Not having a QC manager from the beginning is either laziness, being cheap/greedy, or you just do not care! There is NO excuse for what you did on production setup.
Big Battery is the worse company after sale. All they do is sale, support is horrible, never responded to email, VM. We wait to chat with them for over 3 hours, but nobody pickup Never 👎 do business again. We have made terrible mistakes to buy their batteries
Dude, you keep apologizing for Big Battery's FUs! If I want to give to charity, it will be to those who need and deserve it, not a company that is more interested in making a quick buck at the expense of the customers safety and/or time and money.
@@LithiumSolar Again, Will Prowse has already given "Eric" the benefit of the doubt for 2 years! Your disregard for Will's work leads me to think you are benefiting from continuing to support "Eric" and his shoddy products, IMO.
@@winstonsmiths2449 I am not disregarding Will's issue; however, there are some important details Will did not share. I don't want to get involved with it and repeating things in a "he said she said" manner. Also, I am hardly benefiting here. Yes, I receive a commission on sales; however, this is an honest review and as a result of such, has not resulted in any sales of this battery. Not even one. I'm not sure what you're deal is, but if you don't like it, don't buy it... I'm not trying to encourage you to buy something that obviously doesn't fit your needs.
@@LithiumSolar I don't think you missed anything. Big Battery hardware is well made. Everything I've seen reviewed on YT and opening up 48V Badger boxes shows me they are build like Tanks! However, there may be some assembly and minor mechanical design problems. The assembly problems should disappear once a good QC program is in place. The Engineers who write the production line processes need to work with Manufacturing Test Engineering & QC to add inspection steps to the production line, so an inspector can 'see' when parts (like shock-absorbent pads) are missing or badly installed, BEFORE the top covers are installed. Regarding the design problems, it seems like these units are well designed for normal use in normal environments. I think one big problem is over-the-road shipping exposes the shipping packages to much higher G-forces than would seen under normal use. (Learned this while investigating large hard-disk drives being damaged during shipping). I suspect that batteries for RVs & golf carts might also need over-designed internal shock-absorbent materials. Picture driving 800 miles in a dune buggy over rocky roads with your battery pack bolted to the frame. Will it keep working? Does this call for DOD grade shock proofing? Depends on if you want to truck them 3000 miles on US roads..
Constant QC problems from Big Battery for multiple years now. They are not a new company. Failed to put low temp charging protection on their recent packs. Labeled 3 kWh BYD packs as 4-5kWh packs. They say sorry everytime, and constantly assure us youtubers that everything is A-ok, but these issues keep happening. And these issues that pop up are not acceptable. It drives me nuts how they are still sending out packs with problems.
Thanks for the review btw. Very useful info as always. You are about to hit 100K!!! :)
They need to hire Will as QC manager! :) Good test!
For second hand batteries there's not too much to expect even if they look new.
Another UA-camr had a leaky cell in his Big Battery. Lol
Finally heard back from big battery about the issues I was having with my on/off switch not working and always being on and the battery got down to 5.6v on the lcd display, they asked if it took a charge and told me I shouldn't be turning it off unless I'm putting it into storage for a long period of time.
Thanks very much. Residing in Puerto Rico means I am reluctant to geta battery that I may have to pay the high shipping cost to return the unit if it does not work. So sad - because I really wanted a Big Battery. (either the 5.2 or 6.0 kwh)
Same here. I am from PR, but I don’t feel comfortable buying these batteries.
Take a look at his SOK battery review, you will be impressed with the construction of the build. Stay safe.
Thanks to your videos, I opened the batteries my son-in-law purchased from Big Battery and found similar problems with 2 of them and another potential problem with another that could have caused a problem, had I not fixed it. Even though they state that they warranty the battery, they don't pay for return shipping, which is not inexpensive. I was going to purchase two of their 48V PLBR models but after watching your video, checking his batteries and reading Will Prowse's comment, I am going with GyLL's
I’ve had the wolf battery for about a month now, and I’ve had problems with the bms. When it triggers the low voltage disconnect, my battery will not turn back on at all unless I open the top and run a jump cable from one side of the bms to the other, essentially bypassing the bms for a few seconds. Once done, the bms resets and everything functions normally. I’ve only had the battery voltage that low 3 times, but this happens every time.
This is fairly normal behavior for most BMS. Mine did the same thing. The BMS will turn back on once you connect a charger. If your inverter or charger is one of those that won't start without a battery, then you have to do the jumper thing. It's annoying... but many of the batteries that I've tested or built with small BMS do the same thing.
At least your bms worked 🤣 I went out to my battery after about 4 days and it was reading 5.6v on the display
I like the way those cases look! Great teardown and capacity test vid!!🤘
I bought one of these batteries a few months ago, everything seemed find, but after I connected my inverter/charger to it, the LCD no longer turns off, and it makes me wonder if the battery is even disconnecting. I went out the other morning and the LCD display was reading 5.6V even with the battery button off. Shouldn't the BMS have kept it from getting that low? I did get a charge on it but not sure about the BMS, when I emailed big battery the only reply i got was to sign up for their newsletter and still haven't heard anything else back.
I'm looking to buy about 10kW in a 24V configuration in the next few months and Big Battery is on the top of my list currently for the form factor, energy density and price. I was planning on going with the the Hawk 24V MAX, but this is for a mobile system and I am a bit concerned about them since it's been reported that they might need to be laid down flat on their back to avoid issues with mechanical vibration causing damage and electrolyte leakage. That made me consider these since these cells seem better engineered for a mobile application where vibration will be present and I could stand them up as intended, which is preferable as is it makes better use of space even if I'd need three of them to get 9kW. But honestly, QC issues are very concerning given that the customer is responsible for return shipping after 30 days. So if there is a QC issue that doesn't present for 30 days I'm on the hook for (possibly many?) hundreds of dollars of shipping and weeks or even a month or more of returning, waiting, arranging shipment. This means you MUST disassemble and inspect the battery if you don't want to be liable for that. If youtubers are having these issues consistently it's pretty much guaranteed that most customers will.
Those start out as a 13s battery and they cut it up into 3
Of the 1s goes back to make 14s for a (low end voltage) 48v pack, but since lfp is so flat it is above the voltage cutoff of most inverters and works.
4s goes to make one of the battery evo 120ah packs...same form factor as an owl but way cheaper.
8s goes to the husky that you have.
I've been wondering why the fuse is on the negative terminal as opposed to AC current where is on the live wire?
The only fuse that can be used with lithium is a Class T fuse or equivalent or greater. Those ANL fuses don't have a high enough ampere interrupt capacity (AIC), the current can arc over the blown fuse
It's not an ANL fuse. It looks like a MEGA fuse, but a generic version of it. I'm not sure...
@@LithiumSolar mega fuses and Ani fuses also don't have a high enough ampere interrupt capacity. I think a mega fuse is around 2000 amps, believe it or not lithium iron phosphate can push out 13,000 amps or higher I've heard. So it's still not sufficient
What’s the highest ambient temperature that these batteries can operate in?
Thanks for the review, very helpful. Wow, they are going to hire a QC Manager. It should have happened from day one.
48v pack will be too heavy but that would be my choice if I buy one. I also prefer 1p rather than 8p for a battery pack since it will be more easy to balance and identify bad cells. Thanks for the information.
Indeed
The smaller and lighter Gen-2 Badger 48v packs aren't real heavy (34.2 LBS). Even for a 75 year old, like me.
Install 3 of them for 120Ah / 5.85kWh. The harness that shipped with my (NV vendor) order is good for 4 Badger packs (160Ah).
Due to long-range bumpy truck shipping, and what seems to be limited QC, I feel like using three or four of these 48V BDGR packs might be a good idea, if one of your packs fails. You still have much of your stored power available. My 48v setup is only for Back-up in grid-down conditions. My Inverter is only 2,000W because my standard loads aren't that large. If you have only one big 48v pack and it fails during an outage, get out the gas gen?
@@XRinger That is a good deal for the 12S configuration. It is a little low voltage for my applications which need 14S NMC or 16S lifepo4.
@@neliosamch3195 I'm not sure about the internal hook ups in the Badger 48v packs, I do have a copy of the spec sheet and 50.4V is the recommended charge voltage.
The BCM has 11 white wires between the Red & Black wires. Does that mean 12S config? These BCMs don't have any interface to the outside world. So, it might not be easy to locate a bad cell. I didn't pull the cover over the cell wiring, so I don't have a clue what kind cells are down there..
Are they actually laser welded? Looks like they ground down on tabs. Dont typically see that with laser welded parts. I have 2 dozen of the oem 5kw 96v a123 packs as a reference
I'm fairly certain they are laser welded. I see what you mean about looking like the tabs were ground down a bit. I assume it's just melted from the laser welding? I'm not sure... 96V would be a 30s? That's a huge module!
what's your opinion on these A123 pouch cells vs the Prismatic they use to use.
I asked tech support if I could run their Mule batteries in series and they said absolutely not. Can the Hawk be put in series?
Their recommendations have changed since I made some of these videos and I don't think they permit series-connecting any of their batteries anymore. It's been a while since I've worked with them though. I would strongly recommend checking with them and following their instruction. They'll be the ones to know best.
Update on your power shed?
I'm still waiting on the BMS to install the EVEs :(
Great video, when are battery prices going to be feasible for profitable pv systems (when it isn’t diy)
Good question. They're headed in the right direction at least. LiFePO4 where significantly more expensive just a couple of years ago. That's why I began with recycled NMC/LCO cells.
@@LithiumSolar I appreciate the reply, been looking up to your channel for a while now, about to graduate from Appalachian state university this semester with a sustainable tech degree, I was considering going into the energy storage industry specifically...a follow up question if you don’t mind, do you think solid state batteries have the ability to penetrate every industry? Not just the ev space?
buy sok batteries
What are you doing with your “old packs” as you move to lithium iron phosphate?
I don't know yet. I'm considering selling them but am not sure how that would work out from a liability perspective.
Interesting. Shocked about the QA issues. So easy to remedy - just push the button and hit with volt meter - duh. Thats just lazy, Good review. Thanks
As I said in an earlier comment that was removed, Big Battery, Battery Evo and Tech Direct are all the same people selling used and marginally tested equipment that wont hold up over time. Personal experience with defective batteries from them has led me to this conclusion. Remove if you like but it doesn't change the facts.
I have not deleted/removed any comments...? I always welcome honest feedback/thoughts!
@@LithiumSolar Must have been the Amazon review link I put in in. Anyway, thanks for keeping the good, bad and ugly up.
Good video. Are you going to post this in DIYSOLARFORUM? I hope you will. Yes, BB does have QC problem.
After talking with Eric, I feel confident he is doing what it takes to resolve these QC problems.
@@LithiumSolar I agree. Eric is a good guy and often times quite reasonable. I have defended him before on DIY solar forum because so many people are quick to judge such a young company and say the whole company is crap because because so many people are quick to judge such a young company and say the whole company is crap because of one mistake
@@LithiumSolar I have had so many QC problems from my packs over the last year. These problems are still common.
@@HighTechLab I disagree. Just because Eric is a good guy, doesn't mean their QC is good. They also failed to put low temp charging protection on a pack. That is just not acceptable. And just because they are a young company, does not mean they should have these problems for years. They are not a new company, and I bought Li-poly cells from tech direct (big batteries sister company) 4 years ago.
I don't think it is a good excuse. It is not 1 mistake. It has been multiple mistakes, starting with mislabeling the capacity of BYD packs. And many other mistakes for multiple years. It is NOT ok.
I think you guys are way too easy on them. Imagine if you spent your hard-earned money on this pack for it to arrive unable to turn on. I never have these issues with any other companies batteries. That laser weld makes me cringe.
Great stuff!
You're very smart.
100K SUBSCRIBERS OTW BOYYYYY
I know, I'm super excited! :D It will be another 1-2 months though at the current rate.
Hey I joined from the infamous portable battery pack vid. I still love what you do. Keep it up!
They look ok but I would not want to fix it if it broke down.
Me either. Can't really separate and repair laser-welded cells. Hopefully I won't have to do that though!
Eric "is going to hire a QC manager"? WHY wasthere not such a position from the beginning? Big Battery is bullshitting its customers. They must be accepting a high failure rate due to Will Prowse giving them an (unintended) boost in sales. They figure they come out ahead even with too high of a failure rate, IMO.
I was going to order the 24V WOLF - LifePO4 - 120Ah - 3kWh battery, but saw this video as I was doing last minute research. Will had a leaky battery that was a health hazard as well as a Hazmat issue! He was not the only one who had this happen. Big Battery needs to go away. They sell shoddy products.
very bad company, return their battery and they keep promising refund but never seen it, have to call our CC to dispute it.
👍
👍🤗Super 🤗👍
Kind of a hack job from them. But I guess it will work. Thanks for sharing
I bought 4 200 amp HR 24 volt 5s8p batteries 2 we're in small cabinets 2 in bigger cabinets and didn't fit under invertor.so I want to order another pack to add 1pack to each of the oversized cabinets no longer available..they need to figure out what to build and how to build it.batterys 3 months old should not be obsolete and no longer available not sure I would buy from them againbuyer beware they should not have these issues as a so called professional battery builder.
They build what they get parts to build with. They are repurposing used, excess production, and new old stock batteries. Not really something you can plan extended production runs around.
Hello Mike,
Thank you for your review of our "BigBattery Wolf Kit". Thank you for confirming that our batteries tested as advertised. If our batteries ever do not perform as intended, we are happy to replace them (for free) per our (10) Year Warranty - No Questions Asked. It is not an easy task to build products like these in the USA as we constantly strive to build a better team, process and product. When customers buy from BigBattery, they are helping to save our environment and employ US Citizens in our factories. Side Update: The grey sticker in your video is a protective covering to protect during shipping, feel free to remove that..
We look forward to having LithiumSolar review our upcoming "Razor Power Wall" and "All-In-One R2D2" Models. I think your viewers will really like these products!
- Eric Lundgren : CEO
BigBattery.com
More effort in the direction of quality before quantity . The retail world is a very public place now thanks to Al Gore's internet . People are putting these things in there house and sleeping in there with them . You might ask your employees to build a battery they would put in their mother's basement to give them something to think about while working.
Eric: I almost made the mistake of buying a 24V WOLF - LifePO4 - 120Ah - 3kWh from your company! Thankfully, your order/cart showed me the wrong tax amount or I would have bought it last week! I feel I dodged a bullet. I follow Will Prowse and he gave you the benefit of the doubt, several times, yet more problems. Are you moving on to new YTs? I will check back with your company a year from now and see if you fixed the problems.
Not having a QC manager from the beginning is either laziness, being cheap/greedy, or you just do not care! There is NO excuse for what you did on production setup.
Big Battery is the worse company after sale. All they do is sale, support is horrible, never responded to email, VM. We wait to chat with them for over 3 hours, but nobody pickup
Never 👎 do business again.
We have made terrible mistakes to buy their batteries
Better off doing your own build, too many unknowns with this company.
Dude, you keep apologizing for Big Battery's FUs! If I want to give to charity, it will be to those who need and deserve it, not a company that is more interested in making a quick buck at the expense of the customers safety and/or time and money.
😁👌👍✌🖖😎
I would not trust that company just my opinion
After talking with Eric, I feel confident he is doing what it takes to resolve these QC problems.
@@LithiumSolar Again, Will Prowse has already given "Eric" the benefit of the doubt for 2 years! Your disregard for Will's work leads me to think you are benefiting from continuing to support "Eric" and his shoddy products, IMO.
@@winstonsmiths2449 I am not disregarding Will's issue; however, there are some important details Will did not share. I don't want to get involved with it and repeating things in a "he said she said" manner. Also, I am hardly benefiting here. Yes, I receive a commission on sales; however, this is an honest review and as a result of such, has not resulted in any sales of this battery. Not even one. I'm not sure what you're deal is, but if you don't like it, don't buy it... I'm not trying to encourage you to buy something that obviously doesn't fit your needs.
You really ran it down to 3v??? LOL
Huh? I ran it down until low voltage disconnect of the BMS, which is 20V for this battery or 2.5V per cell.
@@LithiumSolar 8:55 your tablet reads 2.95v
@@ftShinanigan Yes, because the BMS shut off in the battery and it's now reading a bit of voltage left in the inverter capacitors.
looks like really poor quality work to me. i could have done better in my basement.
I don't see anything at all here that's poor quality. Can you please elaborate on what specifically looks bad? Did I miss something?
@@LithiumSolar I don't think you missed anything. Big Battery hardware is well made. Everything I've seen reviewed on YT and opening up 48V Badger boxes shows me they are build like Tanks!
However, there may be some assembly and minor mechanical design problems.
The assembly problems should disappear once a good QC program is in place. The Engineers who write the production line processes need to work with Manufacturing Test Engineering & QC to add inspection steps to the production line, so an inspector can 'see' when parts (like shock-absorbent pads) are missing or badly installed, BEFORE the top covers are installed.
Regarding the design problems, it seems like these units are well designed for normal use in normal environments. I think one big problem is over-the-road shipping exposes the shipping packages to much higher G-forces than would seen under normal use. (Learned this while investigating large hard-disk drives being damaged during shipping). I suspect that batteries for RVs & golf carts might also need over-designed internal shock-absorbent materials. Picture driving 800 miles in a dune buggy over rocky roads with your battery pack bolted to the frame. Will it keep working? Does this call for DOD grade shock proofing? Depends on if you want to truck them 3000 miles on US roads..
Non serviceable....
wow so expensive for low grade
Low grade? What is "low grade" about it? It's designed very well.