Project battery soc (experimental)

[andig]

Taking solar forecast and baseload into account, his PR is supposed to provide a battery forecast, maybe looking like this:

JSON

  "events": [
    {
      "ev": "battery-charge",
      "ts": "2025-03-08T14:15:00+01:00",
      "val": 55
    },
    {
      "ev": "battery-soc",
      "ts": "2025-03-08T16:00:00+01:00",
      "val": 100
    },
    {
      "ev": "battery-discharge",
      "ts": "2025-03-08T18:00:00+01:00",
      "val": 100
    },
    {
      "ev": "battery-charge",
      "ts": "2025-03-09T08:00:00+01:00",
      "val": 66.47125
    },
    {
      "ev": "battery-soc",
      "ts": "2025-03-09T10:00:00+01:00",
      "val": 100
    },
    {
      "ev": "battery-discharge",
      "ts": "2025-03-09T17:00:00+01:00",
      "val": 100
    },
    {
      "ev": "battery-charge",
      "ts": "2025-03-10T08:00:00+01:00",
      "val": 59.34374999999999
    },
    {
      "ev": "battery-soc",
      "ts": "2025-03-10T12:00:00+01:00",
      "val": 100
    }
  ],

Amongst others, we will be able to forecast:

• home battery fully charged today/tomorrow (or charged how far)
• loadpoint demand fulfilled today/tomorrow (or how much energy per day expected)

TODO

• [x] battery charge
• [x] battery drain
• [ ] battery priority settings
• [ ] smart grid charging
• [ ] chargepoints

[andig]

Stretch goal wäre eine Vorhersage des Strom Tetris analog https://github.com/evcc-io/evcc/issues/18934#issuecomment-2676844046:

[VolkerK62]

Wäre in dem Zusammenhang dann auch eine temporäre Ladesperre (z.B. vormittags) für die Batterie möglich? https://github.com/evcc-io/evcc/discussions/20692

[Tihmann]

Es gibt zum netzdienlichen Laden der Batterie eine gute Studie und Beschreibung der HTW Berlin https://solar.htw-berlin.de/dein-stromspeicher-kann-mehr/ Ziel ist eine zeitgesteuerte BEladung der Batterie abhängig von der Solarprognose

[andig]

Replaced by https://github.com/evcc-io/evcc/pull/22495