Hello, I'm using nodered to interface with a single phase meter configured for solar pv.  How can I retrieve the kw generated only for today?

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The daily kWh is not calculated based on the power value but on the total kWh value. You should perform specific operations when a new day begins.

Store the first and last kWh values of each day and calculate the difference at the end of the day.

For a tutorial on how to implement daily kWh calculation in Home Assistant, you can refer to the following video:

Daily kWh Calculation Tutorial

I think the nodered may also have the same logic.

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