Solaredge SE27.6K on Multiplus-II AC-IN

Question

question

joergsc asked Mar 24, '22

Solaredge SE27.6K on Multiplus-II AC-IN

Hello,
a short questions about the Solaredge SE27.6K Inverters with 3Pcs Multiplus-II (3-Phase System with about 10kWh Battery).
Is it also possible to use the Solaredge SE27.6K on the AC-IN Port of the Multiplus-II ?

like here, but connected to AC-IN:

The PV System with the Solaredge SE27.6K is already installed, the ESS with Multiplus-II, Cerbo-GX etc. have to be added.

Because of the 1.0 Rule, the Solaredge SE27.6K can not add on the AC-OUT of the Multiplus-II.

I know if the Public Grid is down, then the PV Generators also not work, but this would be no problem for me.

Multiplus-II ac coupling solaredge

capture22b.jpg (52.5 KiB)

2 |3000

Attachments: Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

Modifications Space

Node Red Space

Answer 1 · 2022-04-26T07:44:41Z

markus answered · Apr 26, 2022 at 07:44 AM

Hi,

yes, this is possible. You need a grid meter for this to work though, if you live in Germany and you are billed for the net sum of all phases, go for EM24 grid meter, not ET340.

BR

2 |3000

Attachments: Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

Answer 2 · 2022-10-18T18:50:37Z

bulraydin answered · Oct 18, 2022 at 06:50 PM

Hi Markus, we will try out the same setup. There will be a automatic transfer switch which will connect the Solaredge to AC-out in case of grid loss. Due to 1:1 rule, at the same time we will disconnect one PV-String from solaredge, so that the output power of Solaredge never exceeds 15kVA.

For this to realize we are looking for a DC contactor of 750VDC and 20ADC.

Has anyone tried this before ?

1

2 |3000

Attachments: Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

andreas-ziegenfeldt commented · Oct 26, 2022 at 01:43 AM

I’m doing it as we speak, but I will not disconnect any panels and I have 32kwp. Why Should I? How ever I will limit the SE to 3x20A (main fuse size)~ 3x4,6kw when I switch over the inverter from before the MP2 to “after” the MP2. If my loads then are lower then 3x20A the MP2 will change the HZ and that will tell the Inverter to minimize the production.

50.2Hz, 100% Power
51.2Hz, 0% Power
51.5Hz converter disconnects

0 ·

question