question

nam-erik avatar image
nam-erik asked

Supersizing Off-Grid System

Hi,

I have the idea to super size an offgird system and require some technical feedback if this has been tested yet. The idea is:

  1. create a 3 phase system with 12x 15kVA Quattro
  2. Take the above created network and assume this to be a grid/generator and connect it to the input of another 3 phase cluster consisting of 12x 15kVA Quattro.
  3. Each cluster would have its own battery bank installed and charged by a combination of AC and DC coupling.

Theoretically this would allow for maximum 3 phase power of 360kVA, but a few concerns are present:

  1. Can each of the output of each of the inverters in cluster 1 be connected to the input of the inverter of cluster 2 without the use of a common 3 phase bus (with individual protection)?
  2. Can all 24 inverter be connected to a Cerbo GX device and power flow indicated correctly
  3. Can 2 independent battery banks (lithium each with own BMS) be connected to the Cerbo GX device?
  4. Can Cerbo GX devices be cascaded in a master/slave configuration where the master will act as the VRM portal interface?

Should the above work, I presume it would also work for split phase

Thanks for your feedback

Erik

MultiPlus Quattro Inverter Chargeroffgrid3 phase
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2 Answers
Alexandra avatar image
Alexandra answered ·

@Nam_Erik

A cascade set up might work however it is unsupported. So if things go bang or dont work as expected then you are on your own.

https://community.victronenergy.com/questions/23230/two-multiplus-in-cascade.html


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nam-erik avatar image
nam-erik answered ·

Thanks, how about the monitoring part, would want "both" clusters under one VRM plant. Will this be possible?


1 comment
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nickdb avatar image nickdb ♦♦ commented ·
You would need a cerbo for each, so each would be a separate instance.
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