Quattrohead
Solar Wizard
I also ended up holding the bus bars so they could not twist, maybe that's the secret.
Anyone buying these 305ah envision cells?
- Thread starter G00SE
- Start date
Bleedingblue
Solar Enthusiast
- Joined
- May 12, 2020
- Messages
- 564
I'm sure that helps. I held onto the socket/Nut area while tightening. I didn't want them slinging off into another busbar or post and have a really bad day lol
Well shoot.. still $89 a cell. Was waiting for a few more replies as to how they turned out for those that bought them. Can someone elaborate a bit on the diff between A and B grade? Being new (are they new.. or said new but used previously) I would assume if they are same build as grade A, then what caused them to be B grade?
When I looked last night they showed the grade B as out of stock.
I think the “swelling” is why they are grade B
You can expect some swelling and slightly less capacity than grade A cells. Folks here (including me) have tested these cells at 300Ah or higher though. Swelling wasn’t too bad, varying from 1/16”-1/8”, but that’s just my experience. For the price, I think these are good value cells.
Bleedingblue
Solar Enthusiast
- Joined
- May 12, 2020
- Messages
- 564
Was told these were 3000 cycle cells instead of 6000 cycles that is grade A. Even at 3000 Cycles they will last a long time
houseofancients
Solar Wizard
NKON show 5000 for their b grade envision cells
On the grade a they stated 6000
Bleedingblue
Solar Enthusiast
- Joined
- May 12, 2020
- Messages
- 564
NKON show 5000 for their b grade envision cells
On the grade a they stated 6000
That is just what I was told by 18650 battery themselves on the phone.
I'd be happy with 3000 or 5000. Still a lot of Cycles
tjstepanian
New Member
UPDATE :
Wednesday 25 Oct. Have tested 11 of 16 EVE 304Ah cells from 18650. Lowest cell capacity is 311.7 Ah, highest capacity 316.2 Ah. Will keep you posted.
Wednesday 25 Oct. Have tested 11 of 16 EVE 304Ah cells from 18650. Lowest cell capacity is 311.7 Ah, highest capacity 316.2 Ah. Will keep you posted.
42OhmsPA
What's in a title?
I used finger pounds and didn't have an issue. Normally I'll torque nuts/bolts until they break then back off 1/4 turn, I gave it 3 less fingerlbs this time and didn't have any issues, so far.
Good technique.
I was told by a seller that EV or A batteries are capable of a faster discharge (and charge?) rate.
B batteries are fine for ESS (storage batteries).
I think B grade batteries are still capable of a fast enough discharge rate if you were to drop your torque wrench across the terminals
We call that "calibrating".I think B grade batteries are still capable of a fast enough discharge rate if you were to drop your torque wrench across the terminals
Dang! that's really good. My best one tested less than 310Ah. I imagine most of it is down to difference in testing equipment, mine is definitely not lab quality.
tjstepanian
New Member
houseofancients
Solar Wizard
Tested my envision grade a- cells with the same tester...
Came in about same, maybe a bit higher.
Currently NKON has the envision b grades, and no idea when the a grades will come in..
Contemplating if I should go for the b grades or wait for the a- .
So far liking what I see from the b grades though..
Exception the terrible laser welts
tjstepanian
New Member
As you may remember (stated earlier), I bought the B cells from 18650, received a tracking number but three days later received a refund due to lack of inventory. The thing that scares me is the laser welds on the B cells. They gave me a good price on the EVE cells, when finished testing, I may ask for same price on another 16 EVE 304 cells. If they had Envision A cells I would be willing to go that route.
BTW, 18650 is showing the B cell Envisions IN STOCK (just checked) $89 dollars
tjstepanian
New Member
Sorry, here is the link:
www.18650batterystore.com
Back in stock ???
ENVISION AESC 305Ah Grade B Cells - 3.2V LiFePO4 Battery
Brand new ENVISION AESC Grade B 305Ah LiFePO4 battery cells. Tested, sorted, and matched for guaranteed performance. Ideal for applications that prioritize cost-efficiency. 30-day warranty and moneyback guarantee.
www.18650batterystore.com
Back in stock ???
I wish you would buy me 32 too.
Ha, I have the same tester. Maybe I need some calibration.
houseofancients
Solar Wizard
18650 is for me irrelevant..
1. They are half way around globe
2 about 30% tax and shipping would be added by the time I have the cells here
NKON is just a 30 minute drive away
tjstepanian
New Member
I am hoping to catch a video on YouTube showing the process of calibration. I need to brush up on my Chinese if I were to read the manual.
tjstepanian
New Member
Lol, I see...but look at the money you save on the price ?
Similar threads
