[
  {
    "power_w": 5.5,
    "source": "heuristic",
    "temp_c": null,
    "timestamp_utc": "2026-04-03T22:58:05Z",
    "voltage_v": null
  },
  {
    "power_w": 5.5,
    "source": "heuristic",
    "temp_c": null,
    "timestamp_utc": "2026-04-03T22:53:05Z",
    "voltage_v": null
  }
]