Stacked or busbars for Lithium

[1967bowesj]

Collective expertise please, should you stack positive connections with lithium or use busbars. The install will include 2000w inverter although not a long cable run possibly 400mm.

 

[MichaelT]

I used bus bars simply because I have 2 batteries on ks 200a and one fogstar 280a so needed to get them to work together properly, if I only had 1 battery I would just stack them.

 

[1967bowesj]

I used bus bars simply because I have 2 batteries on ks 200a and one fogstar 280a so needed to get them to work together properly, if I only had 1 battery I would just stack them.

Thanks Michael.

 

[Lenny HB]

Bus bars if you have two or more batteries make sure the cables from each battery are the same length.
Even if you only have one battery Bus bars makes the wiring far easier.

 

[1967bowesj]

Bus bars if you have two or more batteries make sure the cables from each battery are the same length.
Even if you only have one battery Bus bars makes the wiring far easier.

Thanks Lenny HB
I seen a picture of the an instal that had what looked like far to many stacked crimps and just wanted the suggestions if there's any issue/performance issues when stacked over busbars.

Mines all busbars even though a single battery, future proofed if I expanded battery capacity

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[eddie]

If your running a decent size inverter, and your lithium batteries have internal BMS's you'll save potential problems using a BUS bar

Connecting multiple Lithiums in the same way as a conventional lead acid set up can cause the initial load requirement from the inverter, which would individually too great for one battery to cope with to cause the battery to shut down, it's impossible to synchronise say three separate batteries to all respond at exactly the same split second and inverter requires power.

Three connected to a BUS bar stops this

If your using a more sophisticated set up with external BMS this can be allowed for in the programming

 

[1967bowesj]

If your running a decent size inverter, and your lithium batteries have internal BMS's you'll save potential problems using a BUS bar

Connecting multiple Lithiums in the same way as a conventional lead acid set up can cause the initial load requirement from the inverter, which would individually too great for one battery to cope with to cause the battery to shut down, it's impossible to synchronise say three separate batteries to all respond at exactly the same split second and inverter requires power.

Three connected to a BUS bar stops this

If your using a more sophisticated set up with external BMS this can be allowed for in the programming

Hi Eddie,

This is the image that had seen, single battery but there's a 2000w inverter in the mix.
I thought I had read on here and other sources that it is best practice to use busbars over stacked connections as it removes most of the risk of the main battery connection coming loose and easier to fuse each wire.

Mines all busbars but was just taking the collective knowledge on this.

Regards John

 

[Nikwilko]

Mbrf on the battery post, heavy gauge cable of greater current capacity to than max circuit draw and greater than the mbrf rating. Take the heavy cable directly to a fuse box feed and distribute to separate circuits with local fuse protection.

 

[Lenny HB]

Hi Eddie,

This is the image that had seen, single battery but there's a 2000w inverter in the mix.
I thought I had read on here and other sources that it is best practice to use busbars over stacked connections as it removes most of the risk of the main battery connection coming loose and easier to fuse each wire.

Mines all busbars but was just taking the collective knowledge on this.

Regards John



View attachment 1111277

That looks like a right bodge.

 

[1967bowesj]

That looks like a right bodge.

Funny you should say that, bet you would feel better if you had spend 3k getting it fitted

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[Lenny HB]

Funny you should say that, bet you would feel better if you had spend 3k getting it fitted

If I'd been charged a fiver I'd be doing my nut.

 

[Carpmart]

Bus bars if you have two or more batteries make sure the cables from each battery are the same length.
Even if you only have one battery Bus bars makes the wiring far easier.

Or the same length proportionate to their diameter if the install doesn’t allow for them to be side by side… thanks to the excellent advice on MHF, I’ve one battery 3m away from the other two, so had to use 50mm2 cable for that 3m cable runs and 1.5m 25mm2 for the other two!

 

[1967bowesj]

If I'd been charged a fiver I'd be doing my nut.

And from a well talked about company

 

[MichaelT]

And from a well talked about company

Name and shame please, dont want others making same mistakes

 

[1967bowesj]

Name and shame please, dont want others making same mistakes

Wasn't my install and have no dealings with the company, might be a bit controversial to name them

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[MichaelT]

Wasn't my install and have no dealings with the company, might be a bit controversial to name them

Ooh not one that everyone thinks are the only company who can install an alarm by any chance ?