Catl 302 AH from Docan

[Northernchateau]

I have 2 310ah 24v LifePO4 battery banks w/Overkill BMS running and saw a need for more battery storage so I went online shopping.
Everything coming from China is 4-8 weeks out so I contacted Any @ Docan and got a price on 8 302ah Catl batteries.
Her price is good and she could ship from Texas in 1 week which she did.
Batteries came via UPS 2 per box and the packaging was mint.
I inspected the cases and everything looked good and the sides were flat withing 1 mm.
Connected them in series with a new Overkill 100 amp BMS and charged them to 28.5 volts (all batteries started out at 3.27 volts)
After that was complete I checked the side flattness and noted all swelled approx another 1 mm ish.
Now I connected the batteries in Parallel and charged them to 3.65 volts.
Once my power supply was down to 0.2 amps I took them apart and load tested 2 cells.
One cell load tested 315 ah the other one load tested 319 ah.
Once the 2nd tested battery get charged back up I will do a quick top balance then put them back in series, in compression and in service.

 

[Alkaline]

Test WH also, what tester are you using?

 

[Northernchateau]

Test WH also, what tester are you using?

1st cell 957.99 wh
2nd cell 951.83 wh
The test from one of the 310 ah cells presently running was 320ah 984.64 wh

https://www.amazon.com/Electronic-Interface-Adjustable-Intelligent-Temperature/dp/B07HB3XK7L/ref=psdc_14244471_t1_B07F3NHHST

 

[Alkaline]

Hrm exceed the AH but are short WH. The Catl 302 is a 966 Wh cell.

Can you upload some pics I would like to see the qr code.

 

[Northernchateau]

Hrm exceed the AH but are short WH. The Catl 302 is a 966 Wh cell.

Can you upload some pics I would like to see the qr code.

USA STOCK CATL LF302 LiFePO4 battery with laser welded stud

 

[Alkaline]

Those look good, I think you got a nice set of cells! What was your cost / cell?

 

[John Frum]

I have 2 310ah 24v LifePO4 battery banks w/Overkill BMS running and saw a need for more battery storage so I went online shopping.
Everything coming from China is 4-8 weeks out so I contacted Any @ Docan and got a price on 8 302ah Catl batteries.
Her price is good and she could ship from Texas in 1 week which she did.
Batteries came via UPS 2 per box and the packaging was mint.
I inspected the cases and everything looked good and the sides were flat withing 1 mm.
Connected them in series with a new Overkill 100 amp BMS and charged them to 28.5 volts (all batteries started out at 3.27 volts)
After that was complete I checked the side flattness and noted all swelled approx another 1 mm ish.
Now I connected the batteries in Parallel and charged them to 3.65 volts.
Once my power supply was down to 0.2 amps I took them apart and load tested 2 cells.
One cell load tested 315 ah the other one load tested 319 ah.
Once the 2nd tested battery get charged back up I will do a quick top balance then put them back in series, in compression and in service.

What capacity tester did you use?

 

[Northernchateau]

Those look good, I think you got a nice set of cells! What was your cost / cell?

$1386.00 to my door

 

[Northernchateau]

What capacity tester did you use?

https://www.amazon.com/Electronic-Interface-Adjustable-Intelligent-Temperature/dp/B07HB3XK7L/ref=psdc_14244471_t1_B07F3NHHST

 

[Alkaline]

$1386.00 to my door

that's pretty high...

 

[John Frum]

https://www.amazon.com/Electronic-Interface-Adjustable-Intelligent-Temperature/dp/B07HB3XK7L/ref=psdc_14244471_t1_B07F3NHHST

I don't think that tester has voltage sense leads.
If I'm right, its not going to produce reliable results for watt hours.
The voltage drop over the current carrying leads will make the watt hour computation artificially low.

 

[Alkaline]

I don't think that tester has voltage sense leads.
If I'm right, its not going to produce reliable results for watt hours.
The voltage drop over the current carrying leads will make the watt hour computation artificially low.

Yes for a little more money get the version with v-sense leads:

https://www.amazon.com/gp/product/B0B5CNRMTK

 

[Northernchateau]

that's pretty high...

For 8 batteries of that size that I got in just over a week?

 

[Northernchateau]

Yes for a little more money get the version with v-sense leads:

https://www.amazon.com/gp/product/B0B5CNRMTK

The one I have was recommended back when I purchased it and if this one dies I will step to the one you linked.

 

[Alkaline]

Actually your right, they are fair priced, I was thinking should be 600 but those were the 280.

 

[Kornbread]

I have 2 310ah 24v LifePO4 battery banks w/Overkill BMS running and saw a need for more battery storage so I went online shopping.
Everything coming from China is 4-8 weeks out so I contacted Any @ Docan and got a price on 8 302ah Catl batteries.
Her price is good and she could ship from Texas in 1 week which she did.
Batteries came via UPS 2 per box and the packaging was mint.
I inspected the cases and everything looked good and the sides were flat withing 1 mm.
Connected them in series with a new Overkill 100 amp BMS and charged them to 28.5 volts (all batteries started out at 3.27 volts)
After that was complete I checked the side flattness and noted all swelled approx another 1 mm ish.
Now I connected the batteries in Parallel and charged them to 3.65 volts.
Once my power supply was down to 0.2 amps I took them apart and load tested 2 cells.
One cell load tested 315 ah the other one load tested 319 ah.
Once the 2nd tested battery get charged back up I will do a quick top balance then put them back in series, in compression and in service.

I received a quote from Docan a couple weeks ago inquiring about US stock 302ah cells. They quoted China stock shipped to US because 'the US stock listed on their website was an error.' ???

 

[Northernchateau]

I received a quote from Docan a couple weeks ago inquiring about US stock 302ah cells. They quoted China stock shipped to US because 'the US stock listed on their website was an error.' ???

When I looked 302 ah were in stock in texas and I got a quote from Amy on Oct 10th. I sent them money via Paypal and 10 days later I had batteries.

 

[John Frum]

I received a quote from Docan a couple weeks ago inquiring about US stock 302ah cells. They quoted China stock shipped to US because 'the US stock listed on their website was an error.' ???

Sounds like classic bait and switch.

 

[Kornbread]

When I looked 302 ah were in stock in texas and I got a quote from Amy on Oct 10th. I sent them money via Paypal and 10 days later I had batteries.

Don't know what's up. Docan still shows Eve 304ah in US stock and the quote was from 10-23. I like the price difference US stock vs China, but the wait ...

 

[SparkyJJO]

Their website is constantly wrong (they really need to keep the inventory up to date...)