More than 10 systems?

Is their anyway to add more than 10 systems to PVoutput? At the moment I have 11 discrete inputs from inverters but can only add a maximum of 10 systems.

Its not possible to have more than 10 systems. There are no plans to support per micro-inverter monitoring.

So would that require data aggregation on the system side before it goes out to PVoutput?

Yes, the systems are meant to represent arrays or a string inverters not micro-inverters, so there would never be a requirement for more than 10 ‘systems’