calculate savings of battary storage

[barakuda21]

Calculate each 24 hours the charging energy and discharging energy, by adding the energy tarif for charging and discharging, the saving or profit can be calculated.
2 Values can be displayed daily profit and the accumulated profit.
Energy data can be gathered by the smart plugs.
Tarifs must be entered at the first setup. Later modified in the App dashboard.
The NFT-Time can be used to set a particular time to calculate once in a day.
A useful time could be daily at sunrise, since it´s expected that the storage is empty or lowest capacity.