Issues with the Energy Flow Card Plus

[Waggers58]

I am having some issues with the Energy Card Flow Plus.

My data all comes from my Solis Inverter. I am feeding in solar generated, battery charge, battery discharge, grid import and grid output figures. All the values are in kWh and represent energy used so far today. See below for the code:

type: custom:energy-flow-card-plus
title: 'Energy Flow (Date Selection: ON)'
energy_date_selection: true
kwh_decimals: 2
entities:
solar:
entity: sensor.solis_daily_generated
grid:
entity:
consumption: sensor.solis_daily_grid_import
production: sensor.solis_daily_grid_export
battery:
entity:
consumption: sensor.solis_daily_battery_discharge
production: sensor.solis_daily_battery_charge
home: {}

The output I am seeing is as follows:

Note, I am generating two displays one where energy_date_selection is true and one where it is false.

My first question, why are the two displays different? The first display (On) matches the output I am seeing on the both the Solis app and the Home Assistant Energy dashboard. The second display (Off) reflects the current value of the inputs. Why does introducing the energy period selector change things so much?

The following images show the corresponding diagrams on the Solis app and Home Assistant Energy:

My second question is how does the Energy Flow Card Plus calculate Home usage? Both Solis and HA use the same formula:

Home Usage = Solar Generation + Grid Import + Battery Discharge – Grid Export – Battery Charge

The difference between the two appears to only be rounding errors. The Energy Flow Card Plus clearly does something different and gets very different results.