question

ravens avatar image
ravens asked

What is the current rating of the Multiplus 12/1600VA/70 for AC-OUT-1 with power assist active?

I'm trying to determine the external breaker needed to go between the Multiplus 1600 and the AC Distribution Panel and am unable to find this information in any documentation.

The link below states to use a 75A breaker for the Multiplus 12/3000/120 due to the 50A transfer switch current and the additional 25A when power assist is active. https://www.victronenergy.com/blog/2020/10/30/how-to-install-a-multiplus-inverter-charger/#:~:text=The%20service%20manual%20suggests%20using,for%20the%2012%2F3000%20multiplus.

Any help would be appreciated. Thank you!

current limit
2 |3000

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1 Answer
Kevin Windrem avatar image
Kevin Windrem answered ·

You can add the transfer switch current rating to the inverter's continuous VA output converted to amps for your output breaker on this unit also.

16 amp transfer switch limit

1600 VA / 230 volts = 6.9 amps

so 22.9 amp breaker (round down to next available size)

If you use a larger breaker, you risk overloading the inverter and/or tripping the input breaker if loads exceed 22.9 amps.

Also note that if you set a lower input current limit, the output current will also be limited. For example, setting the input current limit to 10 amps means you have 16.9 amps available with full power assist. So if that's the normal situation for your installation, size the output breaker accordingly.


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ravens avatar image ravens commented ·

Thank you! Where did you find the information about it being a 16 amp transfer switch limit?

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Kevin Windrem avatar image Kevin Windrem ravens commented ·
The data sheet on the product page
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