Solar monitoring systems are made of hardware and software components, and a system for displaying that data to the customer.
Monitoring sensors will gather data from solar panels or other devices. Depending on the type and brand of system you go with, the monitoring devices might gather data from each solar panel, the power inverter, or on your battery if you have one installed.
The most important part of the monitoring platform is the software, which provides system owners with a data display of all the information being gathered by the sensors and solar inverter.
This information is typically accessible through an app for a mobile device, or a web portal. Many systems these days will upload data to a cloud based monitoring platform which can be accesses easily from anywhere.
Many popular systems for solar panel monitoring can also integrate with a smart meter to provide measurement data on you energy usage and export to the grid, as well as what is being produced by your solar PV system.