[v2026.9.0-a0] Empty result for get_battery_soc_forecast

[FoxP]

Doesn't work : get_battery_soc_forecast

Works : get_forecast

Energy dashboard :

I have 1 battery : LUNA2000-5kW-C0

[ReikanYsora]

Hi @FoxP, thanks for the detailed report.

The empty get_battery_soc_forecast isn't the projection being broken, It's the projection correctly not running because one of its inputs is missing, but until now it did so silently, so there was no way to tell why. The next version fixes exactly that: it logs a clear reason whenever the SoC projection is off, e.g.

Helios battery SoC projection is off: the SoC entity sensor.xxx is unavailable

So on the next alpha, could you check your log for that line? It points at the exact cause. Two things to confirm on your side:

• the battery is configured inside Helios Forecast's own options (capacity + a live SoC entity) — this is separate from the Energy dashboard battery;
• the SoC entity reports a plain 0–100 number (not unavailable).

I've verified the projection itself works end to end (a coherent 24 h SoC curve) once those inputs are present, so this should get you sorted.

Let me know what the log says on the new version.

Cheers ;)

ReikanYsora / Jérôme

[ReikanYsora]

Version 2026.9.0-a1 is out ;)

[FoxP]

From the log :

Cette erreur provient d'une intégration personnalisée.

Logger: custom_components.helios_forecast.coordinator
Source: custom_components/helios_forecast/coordinator.py:331
Intégration: Helios Forecast (Documentation, Problèmes)
Première occurrence: 12:00:37 (1 occurrence)
Dernier enregistrement: 12:00:37

Helios battery SoC projection is off: no battery is configured in the integration options (set the battery capacity and the live SoC entity to enable it)

---

Question :

I have a LUNA2000-5kW-C0 battery (5kW).
But maximum charge level is set to 90%, and minimum to 10%. So 20% of the battery total capacity is never used.
What battery capacity should I set ?

[FoxP]

I set this (from the datasheet).
What is the "rendement aller-retour" ?

[ReikanYsora]

Salut @FoxP :)

Pour celle-là, je vais répondre en français parce que j'ai pas les mots en anglais et la traduction automatique me donne des trucs plus que douteux :D (et c'est d'ailleurs pour ça que tu te retrouves avec un "Rendement aller-retour", je n'ai rien trouvé de mieux :s). Si tu as un meilleur terme, je le corrige de suite.

Le rendement aller-retour, c'est la part d'énergie que tu récupères vraiment de la batterie par rapport à l'énergie qui est entrée. À chaque étape, en charge comme en décharge, une partie se perd en chaleur (dans l'onduleur, l'électronique, la batterie elle-même), donc tu ne ressors jamais 100 % de ce que tu as stocké.

Donc 90 %, ça veut dire que tu stockes 10 kWh et que tu en ressors environ 9. Pour un pack LiFePO4 comme ton LUNA2000, c'est en général autour de 90 % (d'après ce que j'ai vu sur internet, mais je peux me tromper). Tu peux laisser la valeur par défaut sans souci : ça ne fait qu'affiner la projection de SoC, ça ne l'empêche jamais de fonctionner.

Cool pour le nouveau log :) Est-ce que la projection se remplit bien maintenant que la capacité est renseignée ?

ReikanYsora / Jérôme

And the "auto" traduction :

Round-trip efficiency is the percentage of energy you actually recover from the battery compared to the energy that went in. At every stage, whether charging or discharging, some energy is lost as heat (in the inverter, the electronics, and the battery itself), so you never get back 100% of what you stored.

So 90% means that if you store 10 kWh, you’ll get back about 9. For a LiFePO4 pack like your LUNA2000, it’s generally around 90% (based on what I’ve seen online, but I could be wrong). You can leave the default value without any issues: it just refines the SoC estimate; it never prevents it from working.

Cool about the new log :) Is the estimate filling in correctly now that the capacity is entered?

[FoxP]

OK, je laisse 90%. 👍
Oui la projection se remplit correctement. Je ne peux pas encore l'afficher pour vérifier ce que ça donne (voir #41) mais j'ai des valeurs :

forecast:
  - datetime: '2026-08-15T14:00:00+02:00'
    soc: 55.68
  - datetime: '2026-08-15T14:15:00+02:00'
    soc: 54.21
  - datetime: '2026-08-15T14:30:00+02:00'
    soc: 53.48
  - datetime: '2026-08-15T14:45:00+02:00'
    soc: 51.86
  - datetime: '2026-08-15T15:00:00+02:00'
    soc: 53.09
  - datetime: '2026-08-15T15:15:00+02:00'
    soc: 53.71
  - datetime: '2026-08-15T15:30:00+02:00'
    soc: 53.95
  - datetime: '2026-08-15T15:45:00+02:00'
    soc: 53.85
  - datetime: '2026-08-15T16:00:00+02:00'
    soc: 53.42
  - datetime: '2026-08-15T16:15:00+02:00'
    soc: 52.18
  - datetime: '2026-08-15T16:30:00+02:00'
    soc: 50.16
  - datetime: '2026-08-15T16:45:00+02:00'
    soc: 47.51
  - datetime: '2026-08-15T17:00:00+02:00'
    soc: 45.46
  - datetime: '2026-08-15T17:15:00+02:00'
    soc: 42.83
  - datetime: '2026-08-15T17:30:00+02:00'
    soc: 39.64
  - datetime: '2026-08-15T17:45:00+02:00'
    soc: 36.12
  - datetime: '2026-08-15T18:00:00+02:00'
    soc: 32.74
  - datetime: '2026-08-15T18:15:00+02:00'
    soc: 29.04
  - datetime: '2026-08-15T18:30:00+02:00'
    soc: 25.06
  - datetime: '2026-08-15T18:45:00+02:00'
    soc: 20.87
  - datetime: '2026-08-15T19:00:00+02:00'
    soc: 16.76
  - datetime: '2026-08-15T19:15:00+02:00'
    soc: 12.49
  - datetime: '2026-08-15T19:30:00+02:00'
    soc: 10
  - datetime: '2026-08-15T19:45:00+02:00'
    soc: 10
  - datetime: '2026-08-15T20:00:00+02:00'
    soc: 10
  - datetime: '2026-08-15T20:15:00+02:00'
    soc: 10
  - datetime: '2026-08-15T20:30:00+02:00'
    soc: 10
  - datetime: '2026-08-15T20:45:00+02:00'
    soc: 10
  - datetime: '2026-08-15T21:00:00+02:00'
    soc: 10
  - datetime: '2026-08-15T21:15:00+02:00'
    soc: 10
  - datetime: '2026-08-15T21:30:00+02:00'
    soc: 10
  - datetime: '2026-08-15T21:45:00+02:00'
    soc: 10
  - datetime: '2026-08-15T22:00:00+02:00'
    soc: 10
  - datetime: '2026-08-15T22:15:00+02:00'
    soc: 10
  - datetime: '2026-08-15T22:30:00+02:00'
    soc: 10
  - datetime: '2026-08-15T22:45:00+02:00'
    soc: 10
  - datetime: '2026-08-15T23:00:00+02:00'
    soc: 10
  - datetime: '2026-08-15T23:15:00+02:00'
    soc: 10
  - datetime: '2026-08-15T23:30:00+02:00'
    soc: 10
  - datetime: '2026-08-15T23:45:00+02:00'
    soc: 10
  - datetime: '2026-08-16T00:00:00+02:00'
    soc: 10
  - datetime: '2026-08-16T00:15:00+02:00'
    soc: 10
  - datetime: '2026-08-16T00:30:00+02:00'
    soc: 10
  - datetime: '2026-08-16T00:45:00+02:00'
    soc: 10
  - datetime: '2026-08-16T01:00:00+02:00'
    soc: 10
  - datetime: '2026-08-16T01:15:00+02:00'
    soc: 10
  - datetime: '2026-08-16T01:30:00+02:00'
    soc: 10
  - datetime: '2026-08-16T01:45:00+02:00'
    soc: 10
  - datetime: '2026-08-16T02:00:00+02:00'
    soc: 10
  - datetime: '2026-08-16T02:15:00+02:00'
    soc: 10
  - datetime: '2026-08-16T02:30:00+02:00'
    soc: 10
  - datetime: '2026-08-16T02:45:00+02:00'
    soc: 10
  - datetime: '2026-08-16T03:00:00+02:00'
    soc: 10
  - datetime: '2026-08-16T03:15:00+02:00'
    soc: 10
  - datetime: '2026-08-16T03:30:00+02:00'
    soc: 10
  - datetime: '2026-08-16T03:45:00+02:00'
    soc: 10
  - datetime: '2026-08-16T04:00:00+02:00'
    soc: 10
  - datetime: '2026-08-16T04:15:00+02:00'
    soc: 10
  - datetime: '2026-08-16T04:30:00+02:00'
    soc: 10
  - datetime: '2026-08-16T04:45:00+02:00'
    soc: 10
  - datetime: '2026-08-16T05:00:00+02:00'
    soc: 10
  - datetime: '2026-08-16T05:15:00+02:00'
    soc: 10
  - datetime: '2026-08-16T05:30:00+02:00'
    soc: 10
  - datetime: '2026-08-16T05:45:00+02:00'
    soc: 10
  - datetime: '2026-08-16T06:00:00+02:00'
    soc: 10
  - datetime: '2026-08-16T06:15:00+02:00'
    soc: 10
  - datetime: '2026-08-16T06:30:00+02:00'
    soc: 10
  - datetime: '2026-08-16T06:45:00+02:00'
    soc: 10
  - datetime: '2026-08-16T07:00:00+02:00'
    soc: 10
  - datetime: '2026-08-16T07:15:00+02:00'
    soc: 10
  - datetime: '2026-08-16T07:30:00+02:00'
    soc: 10
  - datetime: '2026-08-16T07:45:00+02:00'
    soc: 10
  - datetime: '2026-08-16T08:00:00+02:00'
    soc: 10
  - datetime: '2026-08-16T08:15:00+02:00'
    soc: 10
  - datetime: '2026-08-16T08:30:00+02:00'
    soc: 10.26
  - datetime: '2026-08-16T08:45:00+02:00'
    soc: 10.89
  - datetime: '2026-08-16T09:00:00+02:00'
    soc: 10
  - datetime: '2026-08-16T09:15:00+02:00'
    soc: 10
  - datetime: '2026-08-16T09:30:00+02:00'
    soc: 10
  - datetime: '2026-08-16T09:45:00+02:00'
    soc: 10.25
  - datetime: '2026-08-16T10:00:00+02:00'
    soc: 10
  - datetime: '2026-08-16T10:15:00+02:00'
    soc: 10
  - datetime: '2026-08-16T10:30:00+02:00'
    soc: 10
  - datetime: '2026-08-16T10:45:00+02:00'
    soc: 10
  - datetime: '2026-08-16T11:00:00+02:00'
    soc: 10
  - datetime: '2026-08-16T11:15:00+02:00'
    soc: 10
  - datetime: '2026-08-16T11:30:00+02:00'
    soc: 10
  - datetime: '2026-08-16T11:45:00+02:00'
    soc: 10
  - datetime: '2026-08-16T12:00:00+02:00'
    soc: 10
  - datetime: '2026-08-16T12:15:00+02:00'
    soc: 10
  - datetime: '2026-08-16T12:30:00+02:00'
    soc: 10
  - datetime: '2026-08-16T12:45:00+02:00'
    soc: 10
  - datetime: '2026-08-16T13:00:00+02:00'
    soc: 10
  - datetime: '2026-08-16T13:15:00+02:00'
    soc: 10
  - datetime: '2026-08-16T13:30:00+02:00'
    soc: 10
  - datetime: '2026-08-16T13:45:00+02:00'
    soc: 10

[FoxP]

Je vois que pour demain la prévision reste bloquée à 10% : étrange !