New Eve cells Mb30 MB31
- Thread starter Bennos
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ScropusGobbleBottom
Corn Pop was a bad dude.
No idea, was wondering the same.Just checked them out thanks to you
Looks nice but I am confused by the Charge/ Discharge numbers. Instead of 1C/1C its a says .5P/.5P What is a "P"???
Did done more searching and they are aka LF306f, lf314f.
They also have a massive 560Ahr one, lf560f
ScropusGobbleBottom
Corn Pop was a bad dude.
YES, I saw that last week. Seems to me just a doubled up/ side to side 280k. Interesting, but what about 16 of those? How can you move that? Is any company like Seplos/ EEl going to make a box for a 500Lb battery?? Ha, it seems kinda excessive.
some-random-guy
New Member
- Joined
- Dec 21, 2019
- Messages
- 25
Yes, there really is, lithium battery manufacturers, have been continually improving the production techniques and tweaking the structure of the chemistry to increase the quality and charge and discharge, along with lifespan.
The MB30 and MB31 are real, they are the next generation of cells from EVE, CATL and others also have next gen cells up to 18000 cycles, but that is in a fully climate controlled container for use on the grid, not for your little battery for your home, but you are almost guaranteed to be sold fake, or rebadged CATL cells, so that is why EVE became so popular. The quality is better at EVE if you buy genuine.
What country are you in? You should look for reputable sellers in your country, if you are price sensitive ask for discount. But for warranty reasons its a no brainer. Plus no hidden costs which are still a bit common with Alibaba. Along with fake A grade cells, they are rampant on Alibaba. They laser the QR codes to appear as genuine, and with new dates and with the fake QR excel spreadsheets.
There are at least 1 wholesalers in china who sell to all the alibaba shops, they are the ones who do the sorting and QR code lasering, Hence why almost all sellers are selling the same product with the same fake EVE data.
I know for a fact the stock is up to 2 years old, been sitting somewhere, or pulled out of service in a high voltage pack. It really rare to get A grade outside EVE themselves, and they have resellers in most countries now.
Sverige
A Brit in Sweden
MB31 314Ah cells showed up on Nkon.nl today on preorder for delivery end of June. €92 each plus shipping which is €8 more than I recently paid the same vendor for LF304K cells.
eu.nkon.nl
Eve MB31 Prismatic 314Ah - LiFePO4 - 3.2V grade A - Prismatic - LiFePO4 - Rechargeable batteries | NKON
Additional height of the studs: +-13mm
eu.nkon.nl
bolhuijo
TechnoGeezer
Ooh I saw this when Andy got these in his off-grid garage. P is power. So the 314Ah cell at 3.2V is 1005 Watts at 1C. .5P is 500W. Not sure why they changed this or how helpful it is.Just checked them out thanks to you
Looks nice but I am confused by the Charge/ Discharge numbers. Instead of 1C/1C its a says .5P/.5P What is a "P"???
Brucey
Solar Wizard
18650 has them for preorder for $110 plus shipping, 304s are $105.MB31 314Ah cells showed up on Nkon.nl today on preorder for delivery end of June. €92 each plus shipping which is €8 more than I recently paid the same vendor for LF304K cells.
Eve MB31 Prismatic 314Ah - LiFePO4 - 3.2V grade A - Prismatic - LiFePO4 - Rechargeable batteries | NKON
Additional height of the studs: +-13mm
EVE MB31 Grade A Cells - 3.2V LiFePO4 314Ah Battery
Brand new Grade A EVE MB31 LiFePO4 cells with 314Ah capacity. 10+ years design life, 8,000 cycles. Get unmatched power and performance for your energy storage needs.
www.18650batterystore.com
Andy only tested one cell from each batch of MB30/31s and the 30 had the higher capacity.
https://www.alibaba.com/product-det...j8oj9l&bm=cps&src=saf&productId=1601075636787
$100.50 per cell with shipping.
https://www.alibaba.com/product-det...j8oj9l&bm=cps&src=saf&productId=1601075636787
$100.50 per cell with shipping.
Brucey
Solar Wizard
That listing seems dubious:
Qishou 10000 Times Cycle Brand New Grade A Mb30 306A Lf306 306 Ah 306Ah Lifepo4 Lithium Ion Batteries Cells For Solar System
Brucey
Solar Wizard
As someone mentioned they are now listing cycles to 70% degradation versus previous 80% level
S Davis
Solar Addict
- Joined
- Sep 25, 2021
- Messages
- 779
And reducing the C rate.
I’m thinking calendar life will do them in before cycle in my case. In two years the bms’s have only counted 145 cycles probably because I don’t have much depth charge. Example of the last 30 days;
Sverige
A Brit in Sweden
18650 has them for preorder for $110 plus shipping, 304s are $105.
EVE MB31 Grade A Cells - 3.2V LiFePO4 314Ah Battery
Brand new Grade A EVE MB31 LiFePO4 cells with 314Ah capacity. 10+ years design life, 8,000 cycles. Get unmatched power and performance for your energy storage needs.
It’s not often we in Europe get better pricing than the US. Those guys at 18650 seem to be making the most of end users not having fully caught up with how much the producer prices have dropped, and must have jacked up their margins compared to last year.
I think most will pay the extra price to have someone state side that they can deal with for warranty issues.
The datasheet of the LF304, which has a similar capacity to the EVE MB30, states that it has 4000 cycles until its capacity degrades to 80% when charged and discharged at 0.5C.
Considering this point, isn't the MB30 an upgraded cell that has a large capacity yet maintains durability similar to that of the LF280K?
Considering this point, isn't the MB30 an upgraded cell that has a large capacity yet maintains durability similar to that of the LF280K?
ScropusGobbleBottom
Corn Pop was a bad dude.
Oh how I love being utterly irresponsible and getting my order from 18650 in just 3 days.. it scratches my itch.
floop
New Member
The change is to highlight the fact that the voltage changes over the course of discharge so constant amps doesn't equal the same amount of watts over the course of a full discharge. They're saying you can continually pull 507W from a MB31 cell for the full 3.65V to 2.5V and expect to get the charge cycles advertised (along with compression and temp of course), even though the amps would be lower (138.9A) than .5C at the beginning (3.65V) and end higher (202.8A) than .5C at the end (2.5V). This makes sense as most loads, like an inverter, isn't consuming constant amps as voltage changes over discharge. The spec sheet for for MB3(0,1) is way more specific on performance characteristics relating to maximizing lifecycle performance. I love that it has clear expectation on full voltage charge/discharge to get rid of the diy folkwisdom of not charging to the full 3.65 or discharging to 2.5 to extend cell life. It's obvious that with the added unadvertised capacity, when new, that EVE expects full charge discharge to still result in the full advertised cycle count.Ooh I saw this when Andy got these in his off-grid garage. P is power. So the 314Ah cell at 3.2V is 1005 Watts at 1C. .5P is 500W. Not sure why they changed this or how helpful it is.
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