Seplos CAN BUS RS485 48v 200A 8S-16S BMS

[Neil H]

The v3 connects only to the negative side of the battery and there is a small screw terminal on the bms for a positive feed (B+)


The positive from the battery feeds directly via fuse to the invertor

 

[scobo]

The v3 connects only to the negative side of the battery and there is a small screw terminal on the bms for a positive feed (B+)


The positive from the battery feeds directly via fuse to the invertorView attachment 189046

Thanks Neil, do you have a picture at all showing the busbars connected to the board ?

 

[Neil H]

Thanks Neil, do you have a picture at all showing the busbars connected to the board ?

You fitting it to a Mason?

Horizontal or vertical ?

 

[scobo]

You fitting it to a Mason?

Horizontal or vertical ?

Mason horizontal.

 

[scobo]

These are the busbars that came with it.
Radio silence from Seplos so far. ?
And awaiting a reply from Frogstar.

 

[Neil H]

These are the busbars that came with it.
Radio silence from Seplos so far. ?
And awaiting a reply from Frogstar.

View attachment 189050

That looks like the V2 kit

 

[scobo]

That looks like the V2 kit

So I have a v3 board with v2 busbars ? ?

 

[Neil H]

See belowe

 

[scobo]

Yeah the busbars don't look quite the same as v2 apart from SF-N5.
And there's only 4 whereas v2 has 5 as far as I can see.

 

[Neil H]

So N2 goes from B1 to battery neg looking at the BMS it will go to the left and up

N3 will go to the left side of the fuse from P-

N5 from fuse to Neg outpout

N7 from battery to poss output

PS the neg / positive outputs are the other way round to V2

 

[Neil H]

hope that helps

 

[scobo]

Thanks for taking the time Neil, much appreciated, but that doesn't look right either.
N2 won't reach the battery from there and N3/N5 wouldn't fit either .
I'm not convinced I even have the correct busbars.

 

[Neil H]

Thanks for taking the time Neil, much appreciated, but that doesn't look right either.
N2 won't reach the battery from there and N3/N5 wouldn't fit either .
I'm not convinced I even have the correct busbars.

View attachment 189065

That's right they do need a bit of bending also put the fuse in 1st

 

[Neil H]

N2 (B1) goes the other way (points to the right
sorry

 

[scobo]

Actually Neil, that's beginning to make more sense and I think you could be right.
I'll maybe hang fire till I get a reply from Frogstar or Seplos though for some official instructions.
Don't want to end up with a £2k brick. ?

 

[scobo]

N2 (B1) goes the other way (points to the right
sorry

I'll have a go at connecting the busbars this afternoon without connecting up to the battery to see if they fit.
Do you reckon then that nothing actually connects to the small B+ screw ?
Or is it maybe something to do with the active balance board ?

 

[houseofancients]

That looks like the V2 kit

it is

 

[Neil H]

I'll have a go at connecting the busbars this afternoon without connecting up to the battery to see if they fit.
Do you reckon then that nothing actually connects to the small B+ screw ?
Or is it maybe something to do with the active balance board ?

View attachment 189066

this is the positive supply to the BMS as the other main leads are only negative

should have a short red lead with a large round terminal on one end and a small on the other this connects to the positive on the batteries

 

[Neil H]

it is

its not

 

[scobo]

this is the positive supply to the BMS as the other main leads are only negative

should have a short red lead with a large round terminal on one end and a small on the other this connects to the positive on the batteries

Yes, there is. About 48cm long. ?
So presumably, the BMS negative supply goes to B- via the busbars ?
Therefore P- is power negative and B- is battery negative ?