Help understand the GoodWe Inverter integration diagnostics

Hi,

I’m using the GoodWe Inverter integration to track my solar production. I see the ‘Diagnostics’ that there are several items that I don’t understand. There are several readouts called “On Grid L1 Power” " On Grid L2 Power" " On Grid L3 Power".
Do these refer to power drawn from the grid? Or exported to the grid? Or other?

Thanks in advance for your help!

Jason