Good review on supplier.

tim0shel

Solar Addict
Joined
Jan 27, 2020
Messages
388
Air conditioned space. Well maintained at 25c.The second and third tests came in a bit higher at 308.7 and 309.5. The battery is now installed in my new solar generator after a solid top balance.
Did you post anything about this Solar Generator? I have built one and now want to use some of these cells as a add on battery for my solar generator. Which would give me 7kw + of power. :)
 

Joe BoyKey

Watts, Watts, more Watts
Joined
Sep 11, 2020
Messages
521
Location
Austin Texas
As the pic shows, connections from cell to cell with supplied bus bars and from bank to bank you will have to shorten and drill a new hole, Joe.

View attachment 65047
Thanks @Sback
Update, instead of shorting/ cutting the supplied buss bars, I was able to bend them shorter, thus not changing resistances and creating a little buffer between banks, not the prettiest, sure the electrons won't mind, haha. Funny the supplied bas bars are the exact width of the 2x4 before bending, Joe.

1632362850334.png 1632362894990.png 1632362947466.png

1632363002725.png 1632363054942.png
 

FloridaSolarMan

Solar Enthusiast
Joined
Sep 11, 2021
Messages
8
Ok well I have seen enough both here and in email with Amy Zheng to go ahead with a purchase of (8) 280ah Grade A EVE cells. Total cost shipped to Tampa, FL was $1235. I don't have all my other components picked out yet, namely having the hardest time with the BMS, but I am picking up a top balancer as well as the simple capacity tester Will recommends so I can fully test each cell.

I am building a solar generator, plan is a 24v 280ah bank, 200A BMS (looks like Daly may be my only option here), 4000w Giandel inverter (needed mostly to handle the well pump surge), 2x40a Epever MPPT, 1500w solar. Still have to figure out all the fuses but have found enough information on this forum and Will's videos to be comfortable enough to do this myself. So thanks to him and everyone else for sharing everything you do. Hopefully I can contribute something useful here as I go through this process.
 

Joe BoyKey

Watts, Watts, more Watts
Joined
Sep 11, 2020
Messages
521
Location
Austin Texas

Sback

Solar Enthusiast
Joined
Jul 5, 2021
Messages
83
Straight from the Manufacturer - takes 21 days. You can top balance batteries while waiting, 1/2 price of Overkil that's out of them, of course youl want 12 or 24v model, Joe.
Jbd is the way to go if only need 200amp or less. Dally bms suck.. the one thing about Dally that I don't understand is they only ballance when charging. That makes no sense to me.
 

beckkl

Solar Enthusiast
Joined
Jun 9, 2020
Messages
144
Just got 16 of the 304's from Amy. Packaging seems good. Cells seem good at first glance, but only had time to open one package before leaving for the weekend. These three were all at 3.22V.

Communication was great. Buying with FB and paypal is a bit weird, but you can't argue with results. I'll report back after I capacity test a few.

IKifN84pQzRl7u3YbF4tLPGE_HIyexWe-ZGBFLFEkvgY53Wkb-zO0Wv3dflu4I6vwRZtbd9dqziUJaew-M_Ly-EJTAOX00eoececZ93-MpAM2Dp8s1RvzOwzE0duQeQsyjJQfx7MIn_L-hVaxjYvZpZqdBY3UZEIJ0cJyZE0b74NO7py8Wa0uzd0M87bb2XzT0kEp_th3rTldZid_jd5Ejx_OTeJKm-WM83uwIhro2PnzhZvzA-gEOaDWrP6RJE5tetdZZZ_U_4OjR5r_S9S3qjtOSjBdkzMXYLZq-XcA_WvG4HuRnJweN8ygFS5F90DhEHGjl0P3Y0Wi6ATtYaJ_N4GZ-Z1LhKwlfme3nJd8watXaYCZIldNZ7Oz_v3kIHLKXsqSPJSIa1a-J20jK62QDUu67_656xUXfNX9uN4s5EJeSpI0wza0_8Het911N4oKKQCQItR1AsrzDT6X6L0o6qkaWTNcOt3LYuue9bcuVbHZzCDBc4AZqAFuY1TPmcA47DVMVWWS-eTKJXFC0zmZo9gFNLUGmMUVQKBeerlMriAOjwIwdTTMsFV2FzGodVeXFq2Ov3l_AHJPqUw3LrN7_SVMj_04hQ6_HlKQVxlFZq1qFGNLKX4OOIXmgF5QIA_lGykxrYJ6RdYH4eWu46wTe5J--RE40vSC4hgBP6MH1kTNcuNBLnuHY3Sk8NvKA8iP3QLNF2u_dgG9UBuo_OgNtIT=w530-h941-no
 

Amy Zheng

Docan Power
Joined
Sep 1, 2021
Messages
90
Location
China and USA
Just got 16 of the 304's from Amy. Packaging seems good. Cells seem good at first glance, but only had time to open one package before leaving for the weekend. These three were all at 3.22V.

Communication was great. Buying with FB and paypal is a bit weird, but you can't argue with results. I'll report back after I capacity test a few.

IKifN84pQzRl7u3YbF4tLPGE_HIyexWe-ZGBFLFEkvgY53Wkb-zO0Wv3dflu4I6vwRZtbd9dqziUJaew-M_Ly-EJTAOX00eoececZ93-MpAM2Dp8s1RvzOwzE0duQeQsyjJQfx7MIn_L-hVaxjYvZpZqdBY3UZEIJ0cJyZE0b74NO7py8Wa0uzd0M87bb2XzT0kEp_th3rTldZid_jd5Ejx_OTeJKm-WM83uwIhro2PnzhZvzA-gEOaDWrP6RJE5tetdZZZ_U_4OjR5r_S9S3qjtOSjBdkzMXYLZq-XcA_WvG4HuRnJweN8ygFS5F90DhEHGjl0P3Y0Wi6ATtYaJ_N4GZ-Z1LhKwlfme3nJd8watXaYCZIldNZ7Oz_v3kIHLKXsqSPJSIa1a-J20jK62QDUu67_656xUXfNX9uN4s5EJeSpI0wza0_8Het911N4oKKQCQItR1AsrzDT6X6L0o6qkaWTNcOt3LYuue9bcuVbHZzCDBc4AZqAFuY1TPmcA47DVMVWWS-eTKJXFC0zmZo9gFNLUGmMUVQKBeerlMriAOjwIwdTTMsFV2FzGodVeXFq2Ov3l_AHJPqUw3LrN7_SVMj_04hQ6_HlKQVxlFZq1qFGNLKX4OOIXmgF5QIA_lGykxrYJ6RdYH4eWu46wTe5J--RE40vSC4hgBP6MH1kTNcuNBLnuHY3Sk8NvKA8iP3QLNF2u_dgG9UBuo_OgNtIT=w530-h941-no
Looking forward to your test of EVE 304Ah battery cell, thank you
 
Last edited:

Sback

Solar Enthusiast
Joined
Jul 5, 2021
Messages
83
All done with another battery build for a customer with the catl 280 from amy zheng. Capacity test was 285 on this set. This battery supplier is selling good batteries. Happy I found them..
 

Attachments

  • 20210925_160406.jpg
    20210925_160406.jpg
    547 KB · Views: 59
  • 20210926_145419.jpg
    20210926_145419.jpg
    725.8 KB · Views: 62

Amy Zheng

Docan Power
Joined
Sep 1, 2021
Messages
90
Location
China and USA
All done with another battery build for a customer with the catl 280 from amy zheng. Capacity test was 285 on this set. This battery supplier is selling good batteries. Happy I found them..
So excited to see your testing, thank you so much the battery bank build so beautiful.
 

deanbob

New Member
Joined
Aug 30, 2021
Messages
6
What charger do you use to charge your cells initially and back to peak following the capacity test?
 

Sback

Solar Enthusiast
Joined
Jul 5, 2021
Messages
83
What charger do you use to charge your cells initially and back to peak following the capacity test?
To top ballance I hook up bms and charge with a 20 amp watte charger for lithium and then top ballace with a dc 10amp power supply box. Then do capacity test after done charge back up with 20 amp watte charger.
 

deanbob

New Member
Joined
Aug 30, 2021
Messages
6
While I know it would take longer, could I get by using the 10 amp power supply to do all of the charging?
 

Sanwizard

Photon Sorcerer
Joined
Feb 2, 2021
Messages
1,354
I am considering ordering the 304's. 16 shipped to my door is about $2400. Seems like a good price at this point. The "Michael" prices from February are long gone I think. Anyone else get some from her?
Not a bad price.
 

Sback

Solar Enthusiast
Joined
Jul 5, 2021
Messages
83
While I know it would take longer, could I get by using the 10 amp power supply to do all of the charging?
I'm assuming your talking about the one that you can adjust the voltage on that is used for top balancing. If so yes you can. I would have a bms installed if charging at 14.6v
 
Top