Discovered live 2026-06-25 driving an actual grid calibration: forcing a full
grid charge is done via OUTPUT PRIORITY, not voltage thresholds.
- SBU (everyday) won't grid-charge unless the bank is critically low; setting
charger_priority=solar_and_utility alone does nothing at 52V.
- SUB (output_priority=solar_utility_battery) runs loads on grid AND charges the
battery to full. Combined with charger_priority=solar_and_utility, grid charging
engages (device_mode->Hybrid/Line, line_dir->input, pack current jumps to ~120A).
- Both POP/PCP set via lvx-control (all-mode-safe, atomic, no flash/USB). Revert
POP->solar_battery_utility, PCP->solar_first when done.
The re_discharge/flash.py approach is dead (firmware NAKs stop_charge>float);
profile eg4-lp4-v2-calibration.yaml marked DEPRECATED.
- grid-cal-monitor: supervises a SUB grid charge, safety aborts (cell>3.60V/
temp>45C), detects re-anchor (all 6 packs ->100%), auto-reverts POP+PCP (trap).
- calibration-charge skill §3 rewritten to the POP lever.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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