Information relating to the degradation of a solar panel type can be found by clicking Settings > Equipment

Clicking modules will show Dimensions (in millimeters), Capacity (in watts), Efficiency, and yearly degradation.

Clicking on Inverters will allow you to see the efficiency and AC Output

Clicking on Batteries will show battery dimensions (in millimeters), Capacity (in kWh), Product warranty (in years), and peak output power (in kW).