How to connect Multiplus II and Microinverters

Question

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question

markus32 asked Sep 3, '22

My Setup:

12 x panels (a 400 Watt)

3 x Microinverter (Hoymiles HM-1500)

1 x DIY Lifepo4 battery (16 cells a 280ah)

I would like to buy 3 x Multiplus II 48/3000/35-32 and connect them to L1, L2 and L3. Using a current sensor I’d like to achieve zero feed in.

For the sake of simplicity lets just look a one phase:

So in my image this would be:

(A) connected to (B) : power grid and microinverter

(A) connected to (2) : power grid to ACin

(3) connected to (A) : ACout2 to power grid

So I have a direct connection between ACin and ACout2, no?

Multiplus-II ESS microgrid

mp2.png (200.2 KiB)

2 |3000

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Answer 1 · 2022-09-04T18:35:47Z

ianjoyner answered · Sep 04, 2022 at 06:35 PM

ACin is bi-directional, so you don't need to connect (3) to (A).

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Answer 2 · 2022-09-04T19:14:48Z

marekp answered · Sep 04, 2022 at 07:14 PM

Do those 3 micro-inverters work as 3 phase system?

When (A) is connected to (B) there is no way to achieve "zero feed" unless you can set (B) to "zero feed".

You cannot connect (3) to (A).

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