Reviewed the cutoff/stop-discharge floor; deliberately kept at 48.0V (3.00
V/cell) for cycle-life margin. Lowering to 46-47V unlocks only a few % of LFP
capacity and isn't worth deeper cycling on this large, non-capacity-constrained
bank. Comment only; no value change.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
- eg4-lp4-v2.yaml: rationale updated 300Ah->600Ah/~30.7kWh; 120A combined is
now ~0.2C. Charge current deliberately NOT raised to 80A: not clipping — at
solar noon on a clear day (2026-06-24, ~5.8kW PV) the bank took only 71A of
the 120A cap. Real harvest limiter is PV (5.8 of 14.4kW nameplate, suspected
down strings), not the ceiling.
- REFERENCE: pack HA entity_ids are triple-prefixed
(sensor.eg4_lifepower4_lifepower4_1_lifepower4_1_*) — discover, don't construct.
No setting values changed; documentation/accuracy only.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
The everyday profile caps grid charging at 54V, so the bank can go weeks
without a full charge and the EG4 BMS coulomb counters drift (proven: pack 6
read 76% SoC while at the same 53.4V/3.337V-per-cell as packs reading 50-55%
— all paralleled, so physically equal charge; the spread is pure drift).
- profiles/eg4-lp4-v2-calibration.yaml: temporary profile, identical to
canonical except stop_charge_voltage 54.0 -> 0 (Full), so grid can finish a
full charge to the 56.4V absorption hold that re-anchors every pack to 100%.
- calibration-charge skill: guided runbook (pre-flight safety, two methods
solar-only / grid-assist, live monitoring with cell-voltage/temp aborts,
re-anchor verification, mandatory revert).
- REFERENCE: scoped action-policy exception (this skill alone may flip
stop_charge, both units, user-confirmed, must revert); corrected pack-6 /
SoC-drift notes to the verified equal-voltage-different-SoC signature.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
