what size shunt do i need

stevewah

New Member
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Jun 3, 2021
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hi all am new here :) am changing all of my set up in my work van . am up grading my setup from 2x 110ah leisure batteries. with a ctek 20a split charge and 200w solar with a 1000w inverter and a 100amp bm1 battery monitor. and for the new set up 4 x 120ah leisure batteries with a ctek 140a split charge to 300w solar and a victron 2000va smart inverter but i dont know if my old shunt is any good for new set up or what one to get if needed thanks for any help
 

snoobler

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Welcome to the forum.

Assuming 12V:

2000W/12V = 167A

If 24V, half that.
 

stevewah

New Member
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Jun 3, 2021
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yes 12v 2000va with prob a surge of 4000va . i do use my set up for tool at work sometime but most of the time camping with low power use
 

snoobler

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Per the above, 2000W/12V = 167A - that's your max continuous, but you should never run continuously higher than 66-80% (manufs differ) of the shunt rating. You don't size for surge. They can handle it for those brief periods.
 

snoobler

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The ebay shunt has a 300A version. If that's the one you got, that's more than 167A or 167/.67 = 249A

Can't go wrong with the smartshunt. Only complaint I've heard is short bluetooth range.
 

stevewah

New Member
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Jun 3, 2021
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yes its the 300a one ive got coming just been put off by the small price lol thanks for ya help with all this
 
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