Yes, that is what it does. It’s not really possible to sum up “Watts”, as that is an instantaneous measure of power at a single moment rather than energy consumed over time. There is an Average option next to the feed, but I’ve never managed to get it to work.
You’d be better off graphing the use_kwh feed instead, selecting the ‘daily’ interval and ticking the Delta option for the feed. Then you’ll get the amount of kWh used per day.
If you don’t have a use_kwh feed, you can add “Power to kWh” process to your input.
