Anyone buying these 305ah envision cells?
- Thread starter G00SE
- Start date
42OhmsPA
What's in a title?
I forgot to mention the 13 that delivered today were all at 3.28V
42OhmsPA
What's in a title?
One could easily fit 32 cells per shelf and have room for retention / compression on the end.
I'd absolutely add a sheet of 3/4 plywood to the bottom.
Ps it's $240 if you have access to whirlpool inside pass...
I'd absolutely add a sheet of 3/4 plywood to the bottom.
Gladiator White 4-Tier Heavy Duty Steel Garage Storage Shelving Unit (60 in. W x 72 in. H x 18 in. D) GARS604TKW - The Home Depot
Easily store your tools and equipment with this White Four-Tier Heavy Duty Steel Garage Storage Shelving Unit (60 in. W x 72 in. H x 18 in. D). Each shelf can support up to 2,000 lbs. It's simple to install.
www.homedepot.com
Yes thar shelf will work for 1x16 stack, the dewalt will do 18x48 will do 2x8 side by side and may do another 2x8, for $199. Same type of assembly, board vs wire shelf, mine holds 2x Trophy and 2x EEL 280Ah.One could easily fit 32 cells per shelf and have room for retention / compression on the end.
I'd absolutely add a sheet of 3/4 plywood to the bottom.
Ps it's $240 if you have access to whirlpool inside pass...Gladiator White 4-Tier Heavy Duty Steel Garage Storage Shelving Unit (60 in. W x 72 in. H x 18 in. D) GARS604TKW - The Home Depot
Easily store your tools and equipment with this White Four-Tier Heavy Duty Steel Garage Storage Shelving Unit (60 in. W x 72 in. H x 18 in. D). Each shelf can support up to 2,000 lbs. It's simple to install.www.homedepot.com
42OhmsPA
What's in a title?
Freaking FedEx... My 5th box went from GA to PA (around 40 miles from my house) to TX. ? I can't do much with 13 cells for my 48v system.
I’m pulling a @Quattrohead. Cells here, boxes here, BMS nowhere to be found and no tracking and haven’t heard back from Howard
I’m itching to play with these cells but didn’t have time last weekend. Hoping I can tackle them this one upcoming
I’m itching to play with these cells but didn’t have time last weekend. Hoping I can tackle them this one upcoming
Quattrohead
Solar Wizard
3 days later and still no tracking for the BMS, I feel a dispute coming.
... and a claim for the cost of all those beers! ?Looks familiar.
42OhmsPA
What's in a title?
Ha. One of my best friends is Mike F, is that you whitesnake? ?
WolfbaneAries
New Member
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- Sep 10, 2022
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Well all the cells look good visually and all showed 3.31v. Charging up now in preparation for top balancing... I'll let you know in a week or two ?
42OhmsPA
What's in a title?
4S4P with no BMS? Am I missing something? I'd abort mission.
WolfbaneAries
New Member
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Just getting the cells up to a higher state of charge with a 12v charger before putting them in 16p configuration for top balancing with a dc power supply. Then they'll go into the box in 16s configuration with a jk bms.
Quattrohead
Solar Wizard
Seriously you are wasting your time, build the battery and put her in service. Let the BMS take care of it for you.
WolfbaneAries
New Member
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- Sep 10, 2022
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Is there any value in getting the cells closer to the SOC of the existing batteries before putting them into service?
Quattrohead
Solar Wizard
SOC maybe 25% difference or around 0.5v should be fine.
Zwy
Emperor Of Solar
Looks to me like you are asking for trouble. No BMS and no voltage limit. If that battery charger was to go over 14.5V (and many lead acid smart chargers will to desulfate) then you will be over 3.65V per cell.
I'd build the pack and use the BMS, charge to about 3.45V per cell and allow balancing to occur. Use the battery as intended and let cells balance. If the cells seem to not balance well, I've used 10AWG wire with ring terminals after removing the busbars to parallel balance cells without taking a pack apart that I have in compression. I have enough 10AWG leads to do 16 cells at one time and use a power supply to charge cells in parallel. Voltage can be whatever you decide, 3.45V, 3.5V or even 3.65V and let the cells charge to that voltage until amps drop below 0A. Then install the busbars and use the battery.
Smarttowers
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- Mar 25, 2020
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I purchased 16 of these envision cells. I have been taking the time to test each cell individually and none of the cells have tested at 305AH or better. The average is 300AH most are just over 300. 3 have been just under at 299.x
I am satisfied with the price to performance. But think they should pull back on their advertised capacity a bit.
Also wanted to include that there is noticable swelling of all the cells. I wouldn't purchase these for systems requiring exact dimensions for a case.
I am satisfied with the price to performance. But think they should pull back on their advertised capacity a bit.
Also wanted to include that there is noticable swelling of all the cells. I wouldn't purchase these for systems requiring exact dimensions for a case.
Last edited:
Agreed on the swelling. There’s varying degree of swelling on all the cells, but nothing seems to bad. I capacity tested only 4 of my 33 cells and they tested approximately 301, 301, 303 and 308Ah. I have top balanced all of them to 3.62V and so far they have been holding voltage within 20mV of each other.
