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>
Unattended morning runner for the calibration top-off. DEFAULT is solar-only
@ 60A: no setter, reads telemetry, weather-gates (PV<4kW by 10:30 -> abort),
monitors the charge with cell>3.65V / temp>45C aborts, verifies all 6 packs
re-anchor to 100%. Validated end-to-end via --dry-run against live HA.
Key firmware finding baked in (confirmed live): MCHGC is LOCKED while charging
(NAKs even in device_mode 'Battery' when charger_status='charging') -- so the
80A throttle test is opt-in (THROTTLE=1), gated on a true pre-charge idle
window, with retry-on-revert and a guaranteed-safe fallback (cap stays 80A
until idle if revert NAKs). No clean noon A/B is possible; documented as such.
Also handles the HA pack-temperature unit trap (entities report degF; the
script reads unit_of_measurement and converts to degC for the safety check).
REFERENCE: documented the MCHGC charging-lock under known issues.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Four Skill-tool skills under .claude/skills/ that let an agent monitor and
troubleshoot the install (2x LVX6048, 6x EG4 LifePower4, OpenEVSE), grounded
in the real MQTT/HA topology rather than generic advice:
- solar-health-check : whole-system sweep + cross-checks + R/Y/G verdict,
incl. cross-unit "silently-dead inverter" detection
- troubleshoot-inverter: FWS fault decode, parallel sync, USB link recovery
- troubleshoot-battery : per-pack imbalance vs SoC-counter-drift, RS485 silence
- power-usage : PV/load/grid/battery balance + EVSE sessions
Shared lib:
- solar-snapshot : live MQTT capture (creds from powermon.yaml, no hardcoding)
- ha-history : HA recorder lookback (token from ~/.config/ha/token)
REFERENCE.md documents topology, real HA entity_ids (doubled slug), known
issues, and a safe-remediation-only action policy (restarts yes; setters no).
Action boundary: diagnose + restart wedged daemons / recover USB links;
never touches inverter/battery setters or flash.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
