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Check out the back half of this thread. https://diysolarforum.com/threads/catl-310ah-grade-a-prismatic-cells-from-basen.17359/post-266161 From what i've read - I don't think a 310AH cell exists...

Are you out west as well? I am sure they'll take a kidney for shipping to Toronto.

Have you looked at their native sunmax products? https://solar.ui.com/

I bought from this store. They shipped very quickly. I had my cells in 32 days (Toronto, CAN). The cells were packaged well and came with bus bars. Physically, they were in great condition when they arrived. They were advertised as 310AH, but are all testing around 299-303. They have a...

100% a mistake in that description. The unit does not have a solar input at all. Also, this may throw a wrench in your plans : key feature number 7 states; Note: This inverter is not compatible with Lithium Iron Phosphate Battery.

The problem is it takes foreverrr. by my timer... my batteries are each taking about 200AH. So they came around 30%. Thats 1600AH.... with a 10A bench charger... 160 hours..

I ended up ordering a HRP-300-3.3 https://www.meanwell-web.com/en-gb/ac-dc-single-output-enclosed-power-supply-output-3-hrp--300--3.3 Was just under 90usd with shipping.

From a physical POV - mine are all in really good shape. A lot better then what most seem to look like throughout the forum. No buldging, dents, or scratches at all. Also - it was nice to receive them in 30 days instead of the 90+ we see sometimes too. The 4 cells I have tested so far, all...

Well. Cell number 2 only pulled 299AH. Looks like they are closer to 300AH cells then 310AH. Anyone know what I should expect when going back to the supplier? I am assuming a few cycles really wont make a difference?

Makes sense. After 24h we were at around 3.532.... 0.001 voltage drop over 3 hours. I'm going to throw it on the tester shortly and see how we make out. Again, this time with no inturruptions or changes. Hoping I can pull 310!

I think this is very dependant on the tool. Do you have a specific tool / battery? Can you get us a model number? The information may be difficult to find. It's likely the BMS has protections built in against cold temperature charging. For example, some of my Ridgid tool chargers have a...

For anyone who is interested; Off charger: 3.655 17H resting: 3.540 @SparkyTMS - thoughts on this voltage drop? Seems to be less then 0.001v an hour now... Will wait another few hours..

(y) Thank you good sir.

With the "better" charge of the second cell in my batch, I feel like I am getting better numbers all around. Will be curious to see what we end up with after 24H. I am trying to source a power supply with more then 10A so I can charge all 8 cells I have, and do a 24h self-discharge test. Cell...

A lot of people seem to use a variety of amazon 10A bench power supply(s) for balacing and cell testing needs. Does anyone have experience with the next level up? IE something that could do 20A or 30A? For both individual cell testing, and pack balancing? Without completely breaking the bank...

I have a few of the same units. It can be useful if you want to control a small load - IE have the load turn off at a certain battery voltage... Or turn the load on and off with a mobile app. It also has some other cool features - like timers (I beleive it's called streetlight) if you wanted...

Well - here we are. 12:20PM 2.550 @ the Terminals with DMM... 2.300 @ the Tester... Andddd 301.36AH I do have to say, the charge of this cell was not ideal. I discconected a bunch, and initially only charged to 3.60. So lets see how the next cell works. And - the next cell is coming off...

If using on a boat / around water - should the unit you are looking for be water resistant? I have the 12/24v Aims unit that Will uses - it's fantastic and capable of high current / fast charging. Otherwise - you should probably look at something more weather tight? Victron and NOCO make good...

745AM. Tester: 3.02v : 215.81AH DMM @ Cell terminals: 3.240V 1010AM. Tester: 2.94v : 262.62AH DMM @ Cell terminals: 3.179 1020AM. Tester: 2.870v : 285.45AH DMM @ Cell terminals: 3.124

I hade mine set to 20A but now you’ve got me nervous :). I will drop it down to 17.5A for the night.

Voltage cutoff is set to 2.5 right now. I will see how things look in the morning, and if the delta is still the same (around 0.17v) I will drop the cutoff voltage to compensate. I was not expecting that big of a difference (made the cables myself with nice ring terminal) - that being said...

After it dropped even less over the next 30 minutes. I decided to start a discharge test. I have also started another full charge on another cell. I will do a full 12hr chart like above, and 24h self discharge test on this cell once it hits 3.650. As for the discharge test.. Will check in...

Here is what we have... Not sure what to think at this point... Time Voltage v Drop 2:42 3.650 3:42 3.595 0.055 4:42 3.564 0.031 5:42 3.545 0.019 6:42 3.531 0.014 7:42 3.523 0.008

8x https://www.aliexpress.com/item/1005002276849871.html?spm=a2g0s.9042311.0.0.5a4d4c4d0QOlp7 They were roughly 1200 usd all in (tax, duty, shipping to canada)

These were listed as 310AH. They were roughly 1200 usd all in (tax, duty, shipping to canada). so 150 a cell.

Thanks Guys - I really apprecate the feedback and advice from everyone. Very informative videos. After 1hr, the cell is reading 3.595. I will measure again over the next few hours before I start the discharge test and update with a small chart later this evening. My other 4 cells arrived...

It's done - both the PS and Cell @ the terminals sat at 3.650 - no current for a solid 15 minutes. Will let it rest for an hour and check the voltage at the terminals. Nothing currently connected. I've got a second cell charging up - I will get that one to 3.650 and do a 24h test to review...

Yes. PS is set to C.V @ 3.65 Battery at the time of writing this @ the terminals is 3.647

I upped the voltage from 3.60 to 3.65 on the PS. Battery hovering around 3.647 now.... ps still around around .28a going into the battery. Will let it hit 0.00 and report back.

It appears as tho I am almost there... Once i'm down to very low current - should I let the battery rest before attempting the capacity test? If yes, how long? What do the people want to see with this new 310AH cell?

Let the testing begin...

https://www.aliexpress.com/item/1005002276849871.html?spm=a2g0s.9042311.0.0.40584c4dbi0Vjw

I received mine today... well 1/2 of them. Will tackle the fun stuff after work. The initial inspection has me feeling positive. They were packed well, and look very clean. No issues with wrapping, dents, or any other visable issues at this time. I will do a full charge and discharge of a...

For anyone in the north Interested - SOK is expecting a container in Canada in June. And we should be able to order then, according to their customer support.

Check out Ontario Battery Service if you're in the GTA as well. I've been dealing with Stefan who has been fantstic. They don't have much for a website - but are really responsive via email and carry some great product.