How to design system with no grid injection

[MGLopez]

Hello,

Beside a "regular" PV system that is saturating the grid injection capacity, I have to design another PV system that will feed the household but whose production will have to be trimmed in order to inject nothing in the grid.

With the model "Connected to the grid", minimum grid capacity is 1 kW, which is higher than the actual grid capacity.

With the model "Isolated", battery are needed, which is not the case.

Any suggestion ?

[dtarin]

11 hours ago, MGLopez said:

With the model "Connected to the grid", minimum grid capacity is 1 kW, which is higher than the actual grid capacity.

 

I don't quite follow what this means. What is the minimum grid capacity and actual grid capacity? I can create a "connected to grid" simulation with a single module. 

[MGLopez]

Thanks for your interest.

The actual remaining grid capacity for this second PV system is 0kVA, as the actual grid capacity of 9kVA is used by the first PV system.

I found a workaround by reworking the data of the loss graph but this is not straightforward

So, in short : autoconsumption with no grid capacity.

[André Mermoud]

In the version 7.2.17 of PVsyst, we have implemented the option of forbidding the grid reinjection when self-consumption is used, without storage.

This option appears in the User's load definition dialog:

In the Loss diagram, this will result in a n "Unused energy" loss.

[MGLopez]

Merci beaucoup !