My PV and battery system has an export limited to zero. What does this mean for me if I want to join a VPP?

In this scenario where your local network operator has limited the export of electricity from your home to zero, this means that you won't be able to participate in a VPP. A requirement for your battery to participate in a VPP is to export energy when a VPP event occurs; if this cannot be achieved, you will not be able to participate.