POC - build a battery storage state of charge

[5snowflake5]

Is your feature request related to a problem? Please describe.
Currently, the app visualizes battery and hydro storage primarily through power flows (MW). This hides the 'state of charge' or the energy volume (MWh) available. For a user, it's impossible to tell if a 15 GW battery discharge in California can last for 30 minutes or 4 hours, which is critical for understanding grid reliability during the evening ramp.

Describe the solution you'd like
I propose a Proof of Concept (POC) for California using a derived State of Charge (SoC) forecast. Since real-time MWh data is often unavailable, we can use the known installed capacity (approx. 60 GWh for 15 GW power) as a denominator. By integrating the net power flows (Charge vs. Discharge) over time, the app could display an estimated percentage of remaining energy. This 'virtual SoC' would provide a much clearer picture of how much 'buffer' the grid has left. On top of that I would suggest a "hours of storage remaining" indicator. Seeing "3.5 hours of storage left at current discharge rate" would be a killer feature.

Describe alternatives you've considered
none

Additional context

• SOC might drift due to efficiency losses
• The model might need a daily "reset" or "anchor point"

[VIKTORVAV99]

It's a interesting concept but I'm not sure we would want to make anything for a specific zone. Most if not all our data (with the exception of price) is universal and can be applied for all zones and so far this data have not been available in most of the sources we use. Especially for battery (hydro storage is a little bit better but not as granular).

I'll raise it with the team though as I think it's a good idea. But our internal roadmap and priorities have already been set for the next few months so this might take a while.

The second point is we can't really do this just for battery (once again to keep it consistent) so we would have to build a system that includes all kinds of storage we support today (or might add in the future).

I'm really interested in as to why you want this feature though, is it just because you yourself (and others) want a better understanding of the grid or is it for some other reason? This will help us put the right priority on the issue internally.

[5snowflake5]

Haha, no worries. At my job before anything is implemented in full, we always start off with a POC. But I would be more than happy to have this feature for all countries :)

I am a highend user of the app myself, and it's something i really miss to understand the value of hydro storage and battery storage. It would close a gap in understand the grid, indeed!

[VIKTORVAV99]

Yeah a POC technically makes sense but all the logic would have to be consistent across all zones so while we wouldn't have to compute all data for all zones for a POC it would still have to be integrated the same way as a production system would.

This is mostly because we don't really compute data per zone, we compute it per grid (so the whole european grid at once to account for import and exports). Which means that any changes to that methodology needs to be zone agnostic.

We are however considering getting the hydro reservoir levels into our systems (and the app) but the current data from ENTSO-E at least is weekly. But if you know any other such sources it would be easier to motivate and implement as we can do it for more zones!

I know it's not battery but I think it would be a good addition for the zones that does have hydro reservoirs.