How to solve the problem of power recording

[vernal plume]

Thank you for your time and patience.
Here is a detailed introduction to the problem:
The electricity bill for the new house is paid to a third-party company, so I encountered the problem of not being able to check the remaining power.
When the remaining is insufficient, they will suddenly cut off the power (my NAS!!!).
Currently, I have an ESP Home module that can connect to indoor electricity meters to record electricity consumption and other data.
I have the following requirements, and I have tried some AI methods but they have not worked properly.

1. Can check the current remaining available power.
2. After recharg, can click a button to fill in the recharge amount and automatically update the record.
3. When the amount remaining is low, an automation can be executed (for linking notifications with other smart devices).

Thanks again for your help and patience!

I did tried to use some of the input_number component to do such things... but I got confused by the yml stuff..

plus I got the Browser mod installed but still confusing by how to use it