question

motylu avatar image
motylu asked

Limit MultiPlus-II feed-in current in parallel installation

Hello,

is it possible to limit feed-in current individually in Multis in parallel installation? I want to limit feed-in current to grid to 8 A for each Multi to achieve max. 16 A per phase.

In Grid code settings for Europe there is "Max. AC current xx.x % of INom" desribed as "Maximum AC current for charge and feed in". If I set this parameter to 72.5 % (approx. 8 A) in both Multis, will it work as I expected?

snimek-obrazovky-2023-02-03-v114023.png

Many thanks for answer.

Multiplus-IIcurrent limitfeed-in limit
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3 Answers
Rob Duthie avatar image
Rob Duthie answered ·

Hi

The master unit takes control of the current sharing you set that to what you like and it tell the other inverter to do the same, as far as i know it can't be set for each one.

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motylu avatar image motylu commented ·

Hello @Rob Duthie ,

so if I set 8 A in master and slave Multi in one phase (let's say L3), total feed-in current to grid in phase L3 will be limited to 8 A or 16 A? Or all Multis will be limited according to master in phase L1?

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Rob Duthie avatar image
Rob Duthie answered ·

Limited to the number of parallel units so 16 Amps if master is set to 8Amps

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motylu avatar image
motylu answered ·

Hi @Rob Duthie ,

I tested this settings in three installations and unfortunately system does not work as expected... If I limit both Multis in one phase (two Multis in parallel) to 72.5 % (approx. 8 A), total output current is limited to 16 A, but not only output current for feed-in, but also to home installation connected on AC-out. So this settings seems to be "inverter" output limit, but not only limit for feed-in, as is described in VEConfigure dialog.

Is it possible to limit only output current/power for feed-in (to AC-in) in parallel Multis, but not limiting output current/power to AC-out?

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