This is one of the reasons why I created this custom card:
https://community.home-assistant.io/t/energy-custom-graph-a-custom-card-trying-to-fill-the-gap-in-the-energy-dashboard
It uses the internal Home Assistat echarts instance, so the look and feel can be as close as possible to the default cards.
There’s an option to fill up the current hour with a calculated value from the already available 5min aggregations.
This will show events like large usage from the wallbox, or exporting energy when the battery is full way earlier than the core card.
The last bar for the current hour in this screenshot would be missing in the core energy chart for example:
The card also allows to overwrite the aggregation period for each time-window size the picker provides.
So when looking at a line chart for the current power values of the current day, it might make more sense to generally display 5min aggregations instead of hourly ones (or even raw data from the short term history, which is also supported by the card).
You can override this aggregation setting for each date picker period separately (day, week, month, year).
That way, you can also show raw data for shorter periods while using aggregated data when looking at the whole year.
What’s missing so far is a seperate mode for the card to mimic the core energy-devices-graph (but again with including the data of the current hour), where no time x-axis is used and instead only one bar per entity is show.
Maybe I add something like that in an future update. Would be also cool for displaying power values instead energy, but using the last raw value instead of the change aggregation.
So you see which device currently draws the highest amount of power.