Question about AC PV coupled setup high-level schematics

For Quattro AC PV coupled setup shown below (source), it seems to me some details are missing (I am ignoring AC Out 2).

Is it the case that for the above setup, only a tap of PV inverter and grid is needed as shown above, and no other re-configuration need to be made to existing PV setup connection. If that is the case, I have edited above image to create another setup image where I have added the following to show existing grid-tie PV inverter connections as well (as understood by me):

- Utility meter in between the grid and other inverters

- Electrical panel, with feedback connection from that panel to the grid via the utility meter (for existing grid-tied PV setup).

I will appreciate confirmation from knowledgable folks if my understanding of connection schematics is correct. If it is incorrect, corrections will be very helpful obviously.

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Mike Dorsett commented · Mar 06 at 03:46 AM

There is no connection required between the utility meter and the AC-out1 electrical panel. If you want to bypass the inverter / pv combination, then a proper transfer switch must be used. Do consult a qualified electrician before making any changes to your installation. The PV inverter rating must not exceed the Quatro inverter rating, other than that, excess pv can feed back to the grid through the Quatro. Hence a loop connection is not necessary but DANGEROUS as it will connect the grid to the output of the quatro!!

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sal Mike Dorsett commented · Mar 06 at 04:16 AM

Seems like it is not clear that I was only adding the details of existing PV inverter setup to original victron setup which seems to leave out the details of how existing PV inverter might be set up with grid, utility meter and electrical panel. I have now added clarification to the post.

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