Envision 305 grade B

[Bleedingblue]

That will be the issue, I am sure..
Another lesson learned..always, always multimeter .

Also OP .
I HIGHLY suggest you don't top balance these at the same time :
1. It will take 6+ weeks
2. You want your leads on the opposite side of the cells ( so + on the most positive, one on the most negative


That is quite an impressive row of cells though !

Yes that is what I did. I got some 10 guage wire and tightened the nut down on each end of it. Of course each one was around 10ft long.

But since my BMS has 2A active balancers on em I'm going to let those balance them out.

 

[Quattrohead]

I just put them in the box with the Seplos BMS,connected it all up and added to my other 6 batteries.
Bit of a spark as my existing were at 84% and the new one was at 50%.
Cells have settled down to a 10mv difference with a gentle charge.

 

[Bleedingblue]

I just put them in the box with the Seplos BMS,connected it all up and added to my other 6 batteries.
Bit of a spark as my existing were at 84% and the new one was at 50%.
Cells have settled down to a 10mv difference with a gentle charge.

I've got 4 strings of 16 so I'm going to have to get or make a busbar that holds at least 5 cables. I have been making my own out of copper bars and threading holes in em but that is a super PITA to make. I got some copper bar left but don't know how much. Might take that to a machine shop if I have enough for 2 more busbars

 

[Quattrohead]

I've got 4 strings of 16 so I'm going to have to get or make a busbar that holds at least 5 cables. I have been making my own out of copper bars and threading holes in em but that is a super PITA to make. I got some copper bar left but don't know how much. Might take that to a machine shop if I have enough for 2 more busbars

https://www.amazon.com/gp/product/B09ZY576QL/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1

Sorted.

 

[cs1234]

https://www.amazon.com/gp/product/B09ZY576QL/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1

Sorted.

That has 4 spots. He said he needs 5 spots.

Also has 4 strings of 16.. wouldn't he need more than a 250amp rated busbar?

Am I missing something here? You were probably joking, and I just didn't get it.

edit.. Maybe we are talking about only 2 amps of balancing or something?

 

[a619]

That has 4 spots. He said he needs 5 spots.

Also has 4 strings of 16.. wouldn't he need more than a 250amp rated busbar?

Am I missing something here? You were probably joking, and I just didn't get it.

edit.. Maybe we are talking about only 2 amps of balancing or something?

You can get this bus bar and future proof..

600A 12 Stud Busbars | Red & Black Kit

Manage high-current electrical connections efficiently with the 600A 12 Stud Busbars in a Red & Black Kit, ensuring organized and reliable power distribution in your electrical setup.

signaturesolar.com

 

[Quattrohead]

I am double stacking on mine and it is fine, but yes the big SS version linked to is even better.

 

[Zwy]

Well I paralleld 32 of them and hooked up a charger for 3.5 volts. Never used it before and I turned it off and hooked up the positive and negative wire and it blew up on me. Smoked it before I even turned it on

You had polarity reversed.

 

[Quattrohead]

If this is indeed what happened it might be a simple repair, there's usually a diode across the output to protect against reverse polarity and you probably took that diode out and maybe a track or two.

 

[JJJJ]

It also is beneficial to double check each battery for polarity. Had a batch where at least one of the batteries was marked incorrectly.

 

[Partimewages]

It also is beneficial to double check each battery for polarity. Had a batch where at least one of the batteries was marked incorrectly.

That's a disaster waiting to happen! Every time I read something like this I have to go back to my original electrical/electronics training. Test everything with a verified meter. We tend to get lazy/comfortable and don't with low voltage.

 

[Bleedingblue]

You can get this bus bar and future proof..

600A 12 Stud Busbars | Red & Black Kit

Manage high-current electrical connections efficiently with the 600A 12 Stud Busbars in a Red & Black Kit, ensuring organized and reliable power distribution in your electrical setup.

signaturesolar.com

Those are some great quality ones. Thanks for the link

 

[Bleedingblue]

This is what I'm going to use to put the batteries on. Got some osb already cut into strips and the cells gonna set in these frames. Frames going to be mounted on the wall with 2 studs holding outside up. Have 2x8 on ends and 2x6 in middle with 4 inch long screws to put a little bit of pressure on the cells but not very much. Just very slightly snug.