74 lines
4.7 KiB
Markdown
74 lines
4.7 KiB
Markdown
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# lvx-flash
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Apply declarative YAML settings profiles to an LVX6048 inverter via PI18.
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Reuses the patched `powermon` install at `~/.local/share/uv/tools/powermon/` — the shebang in `flash.py` points there, so no extra setup is needed.
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## Commands
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```bash
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# 1. Snapshot the inverter's current settings into an editable profile.
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./flash.py dump --out profiles/current.yaml
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# 2. Copy/edit. Preview the diff against the live device at any time.
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./flash.py diff --profile profiles/winter.yaml
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# 3. Apply. The tool stops powermon.service for the duration, writes each
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# changed setting via the corresponding PI18 set command, verifies via
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# PIRI readback, and restarts powermon.service at the end.
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./flash.py apply --profile profiles/winter.yaml --confirm
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# 4. Compare two inverters live (for parallel setups). Exits 0 if identical,
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# 1 if divergent. Useful as a quick "are the two in sync?" check.
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./flash.py compare --device-a /dev/lvx6048-1 --device-b /dev/lvx6048-2
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# 5. Runtime sync-check for paralleled units. Reads GS+FWS+MOD+VFW from each
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# and reports firmware mismatch, parallel-valid flag, active fault codes,
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# mode mismatch, AC voltage/frequency divergence. Exits 0 on pass, 1 on fail.
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./flash.py sync-check --device-a /dev/lvx6048-1 --device-b /dev/lvx6048-2
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```
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Device selection on every subcommand:
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- `--serial SN` (default — uses `SERIAL_UNIT_1` for single-device commands, `SERIAL_UNIT_{1,2}` for pairs) — globs `/dev/hidraw*` and picks the one whose PI18 `ID` matches. Resilient to cable moves.
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- `--device PATH` — explicit hidraw path, skips auto-resolution. Useful for probing an unknown unit.
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The known-stack serials are hard-coded as `SERIAL_UNIT_1` / `SERIAL_UNIT_2` constants at the top of `flash.py`; edit them if a unit is replaced.
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`sync-check` depends on the `FWS` / `PGS` additions to `powermon/protocols/pi18.py`; the `--serial` flow depends on the `UsbPortConfig.serial_number` field addition. Both are described in `Install.md` §5(d)(e).
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## Profile schema
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All keys are optional. Only present keys are applied; the rest are left alone.
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| key | range / enum | PI18 setter |
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|----------------------------------|------------------------------------------------------------------|-------------|
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| `battery_type` | `AGM` \| `FLOODED` \| `USER` | PBT |
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| `cutoff_voltage` | 40.0 – 48.0 V | PSDV |
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| `stop_discharge_voltage` | 44.0 – 51.0 V | BUCD (pair) |
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| `stop_charge_voltage` | 0 (full) or 48.0 – 58.0 V | BUCD (pair) |
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| `bulk_voltage` | 48.0 – 58.4 V | MCHGV (pair)|
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| `float_voltage` | 48.0 – 58.4 V (≤ bulk_voltage) | MCHGV (pair)|
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| `max_charging_current` | 10, 20, 30, 40, 50, 60, 70, 80 A | MCHGC |
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| `max_utility_charging_current` | 2, 10, 20, 30, 40, 50, 60, 70, 80 A | MUCHGC |
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| `output_source_priority` | `solar_utility_battery` \| `solar_battery_utility` | POP |
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| `charger_priority` | `solar_first` \| `solar_and_utility` \| `solar_only` | PCP |
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| `solar_power_priority` | `battery_load_utility_ac` \| `load_battery_utility` | PSP |
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| `grid_tie` | `enabled` \| `disabled` | PEI / PDI |
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Pair settings (BUCD, MCHGV) must have both halves present.
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## Safety
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- `apply` refuses to run without `--confirm`.
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- Range + consistency validation runs before any write. A failure aborts before touching the inverter.
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- Each write is followed by a PIRI readback that must match to within 0.05 V. A mismatch aborts.
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- Settings are applied in an order that's safe for a battery: cutoff → BUCD → MCHGV → currents → priorities → grid-tie mode.
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- `powermon.service` is stopped for the write window so the two processes don't fight over `/dev/lvx6048-1`, then restarted even if the run aborts.
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## Caveats
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- Parallel setups: PCP / MCHGC / MUCHGC are indexed by parallel unit (the tool sends unit 0 — master). Some firmware only accepts sets on the master; the slave mirrors silently.
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- `PIRI` reports `max_charging_current` as the effective combined (solar + AC) cap, which can exceed MCHGC's 80 A range. `dump` omits it with a comment when that happens.
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- Changing `battery_type` while the unit is actively charging is generally allowed by the firmware but not recommended.
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