New Year Special
24V 200AH LiFePO4 Deep Cycle Battery ONLY $2790
*FREE SHIPPING
*FREE BLUETOOTH
*3 YEAR WARRANTY (lifetime free service)
*A-Grade GFB Prismatic Cells (up to 8000 cycles)
*Max. Charge/ discharge current:200A
*Weight: 44.6kg
*Dimensions: 37 × 25 × 30 cm (+3cm to include terminals)
Pickup is available at Big Wei Battery located at Unit4/17 Moss St, Slacks Creek, 4127
Other models on special, too:
https://www.bigweibattery.com.au/christmas-new-year-sale/
A-Grade GFB 3.2V 200AH LiFePO4 Prismatic Cell << this is just listing what "cells" it contains…
8 x CELLS make up a 24v Battery
It is kinda poor wording but most people that have a bit of an idea about batteries would understand it…
If you're considering one of these batteries do some research on the Daly BMS's first, they don't have a very good reputation, very poor cell balancing, a lot of them you cant change the bluetooth password so anyone can log in and change your settings, and such… (I have a 12v 100Ah battery from these guys, the capacity is spot on but I have mixed feelings about the BMS)
Saw this popup on their website. Might help the BMS problems?
BWB LiFePO4 Battery Users: DALY BMS is experiencing a major update, which should be completed very soon. The SMART BMS App may get unstable during this period. The software update doesn't affect the performance of your BWB batteries. Please delete the old SMART BMS and downlowd the latest version. Thank you
Thanks but nah, the issues with my Daly BMS aren't related to the Smart BMS app, they seem to be design and firmware issues… I actually went through and installed/uninstalled every old and new version of the Smart BMS app to ensure the password change issue wasn't an app issue… I also contacted Big Wei and they just blew me off with BS replies, I got the impression they don't really know too much about batteries or BMS's, they just throw components together to make a buck… I also asked a Daly company rep about it on one of the battery/off-grid forums, they just said something along the lines of "that isn't possible on that BMS", lol, it felt like a "go away we're not interested in supporting our products" type response …
I wrote a heap more but it got a bit long-winded and ended up as a bit of a ramble so I deleted it all, lol
Ahhh, it seems there was an app update on Dec 23rd that forced a BMS Firmware update which failed, lots of unhappy Daly owners ended up with bricked BMS's:
https://diysolarforum.com/threads/todays-daly-smartbms-andro…
It wasn't an issue for me because I settled on a 6 month old version of the app because it runs a lot smoother than the newer versions, and I hadn't looked for updates since early Dec… (I doubt the firmware update issue would have affected me anyway, the BMS that came with my battery is a 2yo discontinued model and I very much doubt they would be writing new firmware for it, it seems they drop support the second they released a newer model)
It seems they released another version on Dec 29th which I assume was to roll back the disasterous Dec 23rd version, I just installed that latest version to double check that it was the same as all the other versions and the password cant be changed and such, yep no different… It's just a lot more unreliable than all the other versions, slow and constantly crashes, so I'm back to the 6 month old version again, lol…
This is why I suggest people do some research before spending big money on a battery which contains a Daly BMS ;) (and/or buy from a company that offers support)
Edit: Here's one comment on the first page of the forum link I posted above, lol
I've written to Daly and to the outfit I bought the BMS from.
I'm not really expecting any response because:
1) Daly are "famous" for ignoring their customers.
2) Given the level of Coronavirus infection in China at the moment, I doubt there is anyone in the office who can do serious work.
I don't need my battery bank for the next week or two. If nothing has been sorted by then, I guess I'll order a different BMS and join the long line of people who have chucked their Daly BMS into the bin.
Agreed about far too sparse technical detail on their website…. which means you need to trust them a bit…BUT
Bigger concern to me is the company's credibility - regarding their warranty. - What they say about warranty conditions is against australian consumer law. Does this mean you'll have a battle with them or worse, if something goes wrong? Big Wei says any manufacturing defects under warranty will be fixed by them, but you pay freight both ways (not cheap with a big lithium battery) Australian law says they must pay freight (both ways) for warranty repairs.
https://www.bigweibattery.com.au/wishlist/bigweibattery-warr…
The benefits of this warranty are in addition to any other rights and remedies available at law. Costs of transportation to and from the Big Wei Battery shop will be shouldered by you.
Which is contrary to australian consumer law:
https://www.accc.gov.au/consumers/problem-with-a-product-or-….
Return costs
If the business confirms that the product does have a problem, it must reimburse the consumer for any reasonable return costs they have already paid.
Not a good indicator for a business you might spend thousands at!!
This has been pointed out to them previously. They probably can't be bothered amending the website.
Remember we complained too much on the few hundred bucks ones listed earlier so here come this one for the answer. Probably not much better but who cares as people might think the more expensive the higher quality hey
This is a bit of a hard one, there's a fair difference between a cheapo 12v 100Ah lithium battery and a 24v 200Ah battery that contains new A-grade brand-name cells… You generally do get what you pay for with large LiFePO4 batteries…
To start with this battery is 4 times the capacity of a 12v cheapie, lol… and this sort of battery is likely to be installed in a boat, yacht, or motorhome where quality and reliability is a fairly high priority due to where and what they'll be used for… i.e. it wouldn't be good if you were in the middle of Bass Strait and you lose all your electronics, (comms, Nav, and such), due to a failed battery (most people would have backup systems but that's a different story)… or if you're on a big lap of the country and your battery fails up The Kimberley while you've got a big fridge full of frozen meat and such, it gets expensive fast, and there's the time and effort factor of trying to get a replacement battery while you're on the road and/or in a remote area… …
Horses for courses, the cheap lithium batteries have their place in the market, perfect for camping, 4x4, weekend trips and such, where if it fails it's not going to be a big deal, but a lot of people are happy to pay more for reliability and life span… Each to their own…
(I'm not promoting this brand, just saying there is a place in the market for quality batteries)
I hope I'm okay to post this, given I'm a competitor (given I'm not really commenting on BWB or their product, it seems to be fine as per the code of conduct).
I agree with you, the thing I'll have to disagree with you on is that the cheap batteries are fine for any form of mobile application, especially 4WDing. I recently purchased one for testing and you can hear and feel the internals move if you tip the battery on its side. Over time this may well become an issue in a mobile application and in my opinion it's a safety hazard.
That's another reason to buy a quality battery (such as the one in this listing) over a cheap one on ebay. It might also not be true for all cheap ones out there, but I can only speak from personal experience about the one I bought.
you can hear and feel the internals move if you tip the battery on its side.
That's not good, I'm fairly sure I've seen that issue in one of Will Prowse's videos also…
Most of the teardown videos and photos I've seen of cheap batteries haven't really impressed me much, like these ones that often come up as deals here:
https://www.ozbargain.com.au/node/723192#comment-12638775
https://postimg.cc/gallery/vMSrj46
They contain 60Ah pouch cells in a series-parallel setup to make a 100Ah battery, they must be quite low grade cells if they're only getting -85% capacity (50Ah) out of the 60Ah cells, they don't really inspire confidence, and I struggle to see them holding their capacity and lasting in the long term…
A lot of people seem happy with the cheapies but from the research I've done I was happy to pay more for a better quality battery, I just can't be bothered stuffing around with crap these days… I've purchased cheap-ish AGM's in the past and they've always been a disappointment, early failures, sub-par performance, and such, the initial cost saving has never worked out well..
this sort of battery is likely to be installed in a boat, yacht, or motorhome
You would have to like taking big risks to install a large lithium battery in a boat or yacht.
Quality LiFePO4 batteries are relatively safe, a hell of a lot safer than the Li-ion batteries used in ebikes/scooters/cars… LiFePO4 generally doesn't light up like Li-ion….
Everyone is installing LiFePO4 batteries in their boats and yachts these days, a lot of bigger yachts are installing large banks so they can use all electric cooking, induction cooktops, household fridges, and the likes, some do it just so they can get rid of the LPG dangers … Some manufacturers are making electric and hybrid yachts with huge LiFePO4 banks as well…
@FLICKIT: And yet boats and especially yachts need ballast for stability, which could be lead-acid batteries.
If lots of people are installing lithium batteries, I wonder if much of the reason is "oooh, new, shiny" without learning about the risk.
Where I work, we have had two incidents where a D-size non-rechargeable battery caught on fire, and both times we got the fire under control with a bucket of sand, but had to evacuate the building until the next day due to the toxic smoke. Not something that you can readily do when cruising around in a yacht, and we had the batteries burning against a non-flammable concrete floor.
@Russ: I get the impression you don't really know anything about LiFePO4 batteries, can I suggest you go do some research?
All the lithium battery fires you see in the media are generally Li-ion or the likes, LiFePO4 batteries generally dont go up in flames and they're considered a safe chemistry, even if they're damaged or punctured they generally only vent gas, and overcharging doesn't cause them to light up like what happens with Li-ion at times…
LiFePO4 isn't a fad ("oooh new shiny" as you say) lol, they're a significant improvement over lead/AGM, in general they're far superior to lead/AGM batteries in every aspect, which is why everyone off-grid is switching to them… (off-grid homes, boats-yachts, campervans-motorhomes-caravans)
Weight is one of the benefits of LiFePO4/LFE batteries, significantly lighter, much easier to manhandle and especially important for campervans and 4x4's… (and BTW, yacht ballast goes down in the keel, batteries dont)
Charge Rate, LiFePO4 can be charged very fast compared to AGM so if you have patchy sun you can cram more power in when the sun is shining, or if you're charging from an alternator or genset you don't have to run them anywhere near as long… (this was probably the biggest benefit for me)
Charge efficiency is higher with LiFePO4, near on 100%, if you throw 100Ah in you will recharge it by 100Ah… AGM is down around 85-90%…
Capacity and depth of discharge, you can only discharge lead/AGM to 50%, so a 100Ah AGM is really only 50Ah, LiFePO4 can be discharged 100% but 80% to 90% is usually advised to maximize cycle life (my 100Ah LFE is good for 100Ah while using quite conservative non-stressful voltages, 13.8v charge, 12v discharge, it's new though, not sure how long that will last, it'll probably drop off a few % fairly fast and then level out)
Cycle life, AGM is only good for a few hundred cycles, LiFePO4 is thousands of cycles….
So basically with LiFePO4 you can get more capacity in a smaller area and charge them faster and they last longer, the downside is cost and most people need to upgrade their charging systems which isn't cheap, but for anyone spending time off the grid the cost is worthwhile, it is what it is, and with the cycle life it should all balance out in time…
@Russ: Boats were early adoptees of LFP technology (which isn't new, it has many years behind it already) and marine use continues to be a major market for the same reasons as elsewhere - reliability, weight, power delivery, discharge rates, charging speed etc.
There is far less risk of fire than you seem to think and as Flickit says you're probably confusing Li ion battery tech and this FAR safer technology. Lithium Ion safety issues are well known, as are 12/24V LA battery explosions.
I've bought a bwb in 100ah.
Doing its job
They have a decent reputation, among atg and renogy.
What an insane price. Lithium seems horribly poor financial decision for this use case
Weight savings bro. These will let you tokyo drift your golf buggy faster
Be handy for that reason and the ability to use all of the battery but not at roughly 10x the cost of AGM. Love the name and avatar btw
Is that your GTR? Do you use LiFePO4 in it? Thinking about switching to one since they're not that much expensive than your regular lead acid battery if you use a motorcycle LiFePO4 in a mount, but don't know if I want to deal with the drama of having a charger and everything.
@Save Medicare: Nah it's a very old avatar from when that r34 was all but a myth. Have a camper van with a house battery that's getting on and one day would like to go lithium and induction cooking
its 44kg lol.
Damn light compared to AGM's !…. 24v 200Ah of AGM batteries would be around 2 to 3 times that weight and they can only be discharged to 50%, so you would be looking at 200+kg of AGM's to get the same capacity as the 44kg lithium battery, lol….
Saw this and thought “didn’t realise Big W sold high capacity LIFEPO4 batteries “
$0 NSW C&C
How? There doesn't seem to be a C&C option at checkout.
Pickup is available at Big Wei Battery located at Unit 4/17 Moss St, Slacks Creek, 4127
Where in NSW is Slacks Creek 4127?
In one line it says "24V 200AH Lithium Battery LiFePO4" (4800Wh). Further down it has "3.2V 200AH LiFePO4 Prismatic Cell" ( 640Wh).
Which one is it? There is a BIG difference.