It's what your panels generate, and what you export to the grid. Nice system by the way.
Yesterday was below average, but I did have a new all time high peak of 15.11 kW, not bad for a 15.535 kWp system, some of it almost 10 years old.
Actually that ten year old 4kWp system was peaking to 3931w and that's the inverter output.
SolarEdge: 15.7 kWh
Garage: 18.52 kWh
North west roof: 20.7 kWh
House rear wall: 4.61 kWh
Peak power was 15.11 kW at 13:28
Total generated yesterday: 59.53 kWh
Total exported yesterday: 68.9 kWh
Total imported yesterday: 28.94 kWh