Solar DetailedInfo always output 0W ?

Hi guys,

I was messing arround trying to do a solar alignement script and i'm stuck in one of the basic task : get the solar panel output.

I'm accessing the detail info in the most basic way i know :

Echo(GridTerminalSystem.GetBlockWithName("(SOL) Solar Panel Master").DetailedInfo);

and it always give me 0W as max and current output.

Is there any other way to access power data ?