question

ask1234 avatar image
ask1234 asked

BMS for bigger systems ?

  1. Hi,

I have an issue with the "charge disconnect" of the BMS ve bus.

We are on a big 24v system with

3x100A chargers , 2 x 80A alternators , 60A solar

and wind generator.

We can't use any of the Cyrix-li because they are

At 240A max

so the chargers and the solar are gonna

Be shut off by 4 wire, 3 with static relay and 1 with ve direct adaptation made by victron for this purpose

Alternators are gonna be shut off by shutting off the regulation via relay

Wind generator are gonna be shut off by activating their brake function via relay


The problem is, the charge disconnect output of the

BMS is only providing 10mA current wich is not enough to trigger a 24v relay to make the system work.


It is any way wich I'm not aware of, made by victron to secure systems like that ?

Using a 120a Cyrix-li-ct as a main relay to trigger the others relay is an idea, but as soon as the batteries are gonna be lower than 26.8v the all charging system will shut off wich we don't want.


BMS
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2 Answers
bathnm avatar image
bathnm answered ·

Take a look at the solid state switch 104


https://www.victronenergy.com/upload/documents/Datasheet-SolidSwitch-104-EN.pdf

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ask1234 avatar image
ask1234 answered ·

That was a solid and quick answer ! Thx

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