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Multiplus II and AC Out 2

Hi,

I am trying to get my head around installation of a Multiplus II. I am installing this in Denmark as there is grid support for this but as far as i understand. The inverter must shut down it's AC Out 1 when the grid fails inorder to protect the technicians on the street to not feed in electricity BUT is there a way i can get power out on AC Out 2 while not delivering to the grid on AC Out 1 in that way i can power some critical things while power is down ? If it is possible i was thinking to put a switch 1, 0, 2 on those critical things so when power drops i can go an d switch it to get power from the inverter AC Out 2 if that's doable and allowed which essentially makes it a off-grid system for that period wile power is down. In the current system i am designing i will have a energy meter and run with ESS since the Multiplus II is a one phase system and the house system is 3 phase so the inverter will start producing energy when it's told from the energy meter there is a usage inorder to get the consumption to 0 as much as possible.

/donnib

Multiplus-IIESSac out 2
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harold avatar image harold commented ·

I don't get your question.

AC1OUT is meant for the critical loads and will ge on in inverting mode, when AC1IN is off

AC2OUT will be only on when AC1IN is ON

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peternielsen avatar image peternielsen harold commented ·

@Harold i can see why it is confusing what i am writing. So i didn't notice the AC IN. So let me start from scratch. In the happy case i guess a user like me with a grid code don't use AC OUT 1 / 2 since the inverter will pump out what it's producing on AC IN in sync with the grid and my loads are also connected on the AC IN not directly but in the panel. When LOM happens the inverter will stop to produce on AC IN but will continue to do so on AC. OUT 1 is that correct understood ? If that's the case then i think i pretty much answered my own question. Just connect the critical loads on AC OUT 1 but the problem is that these loads usually run on AC IN e.g grid so now i need to add the Switch i was mentioning so i can move them from Grid to the AC OUT 1 connection, do i understand this correct ? I hope i make more sense now :)

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harold avatar image harold peternielsen commented ·

Hi
I still don't know why you need a switch.

But it switches like this:

And if you enter no grid code, it will never deliver current to the grid!

1605010856003.png

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