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jjm asked

Smart Shunt - Which device is the right one?

Hello to all,


I am wondering which variant of the Smart Stunt (500, 1000, 2000) is right for me.

I have the main battery on one side (2x 170Ah in parallel) and the starter battery (1x 170Ah) on the other side.

So I will do the circuit as in 3.4.1 of the installation instructions.

I am now wondering, is the Smart Stunt 500 enough?


What else is the selection based on?


...according to the charger?

It will be a Blue Smart IP22.

...what else does it depend on?


Thank you very much in advance for your help.

Regards

Jens


SmartShunt
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klim8skeptic avatar image klim8skeptic ♦ commented ·

What is the max charge/discharge rate your batteries will be exposed to....

Bounced back to you..

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jjm avatar image jjm klim8skeptic ♦ commented ·
It´s 375 @ 80 % discharge according to the data sheet, but I don´t know how old the Battery is.
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1 Answer
Matthias Lange - DE avatar image
Matthias Lange - DE answered ·

The number (500, 1000 or 2000) is the maximum current the shunt can carry.
For most systems the 500A shunt is enough.

500A at 12V = 6.000W
(12.000W at 24V and 24.000W at 48V)

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jjm avatar image jjm commented ·

Thanks for your reply.

Yes, I guess that 500A should be enough.

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sergio-moura avatar image sergio-moura commented ·
Dear Matthias,

I take the chance to ask you for a little help.

I have 4 Gel batteries 12V 250Ah each. They are mounted in serial of two parallel sets that results in a bank of 24V. I guess in the end it is 24V 500Ah. Right?

If that's correct, which smart shunt I should use? a 500, 1000 or 2000?

Thanks.

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