eng-0275
window recorded
citable URL: https://halobench.com/records/eng-0275/ — this address never moves; the anchor /records/#eng-0275 keeps resolving
256.1 Whmean 139.9 W − 10.1 W idle floor (box-idle-all-empty) = 129.8 W attributable
window 2026-08-27T15:54:19Z → 2026-08-27T17:44:24Z · provenance recorded
method wall-meter · aihydra energy sensor via Home Assistant (counter-difference on sensor.hardware_ai_hydra_energy, raw history queried via ha_get_history and linearly interpolated to the window edges; power cross-checked from sensor.hardware_ai_hydra_power 5-minute statistics) · peak 181.5 W · no contention
per task 9.849 Wh · 0.3 p at 30.3 p/kWh
covers run-0632
tau2 airline full-26 (run-0632, wall 6605 s). Energy counter 37.975973 -> 38.232057 kWh = 256.08 Wh total; idle floor 10.1 W * 6605 s / 3600 = 18.53 Wh; active 237.55 Wh. Headline Wh-per-correct = active_wh / 24 correct = 9.898 Wh; pence-per-correct = 0.300 p @ 30.3 p/kWh. Whole-run cost 7.76 p. Power sensor mean (~140 W) independently matches the counter-derived 139.5 W. Joined same-day, well inside HA ~10-day raw retention. Context: ho003 stock-f16 tau2 control (eng-batch) recorded 42.06 Wh per correct answer at 10 correct — Flash-Next is ~4x more energy-efficient per correct answer, solving 24 vs 10 in less wall time.
Wh, never joules — read as a cumulative-counter difference across the window; delta over the idle baseline is the only figure that means anything