Hi,
I like the energy dashboard.
Though a few things could be changed or added:
First, what could be interisting to compare the energy usage, is the history of the outside temperature in the given timespan.
Secondly, I think that the self consumption of produced energy (5) is currently calculated with the wrong focus.
Currently it is calculated by [solar energy consumed] / [solar energy produced]. Where [solar energy consumed] = [solar energy produced] (1) - [solar energy fed in] (3)
Well that might be interesting too. But it doesn’t help to compare the energy in relation to the total energy consumed.
If the total energy consumed is higher, than - of course - also the self consumption is higher. But how much of the total energy was used with self produced power?
To see this, it must be standardized to the total energy consumed.
Here is my example from real data:
Last year compared with the current year.
- Since the year isn’t over yet, my current energy consumption is much lower than the full last year
- I also did some investigations to decrease my total energy consumption this year
- I also did some changes to use more energy during the day, to increase consumption of solar power
But due to the way, home assistant currently calculates the self consumption, this was 48% last year and only 40% in the current year. But the data can’t be compared this way, due to the high difference in total energy usage.
So how can we compare that better?
I would propose this: Get the value of [solar energy consumed] divided by [total energy used] (4)
Where [total energy used] = (1) + (2) + (3)
When I calculate this way, I had last year 10018 kWh total energy used, where 2735 kWh are self consumed solar power => 27% relative self consumption.
And this year I had 6381 kWh total energy used, where 2247 kWh are self consumed solar power => 35 % relative self consumption.
Looks much more plausible now - I not only decreased my total energy consumption, but also increased my self consumption of solar power by +8 %
Do you agree?
