noise
56b2cc2bf1
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>
156 lines
8.9 KiB
Markdown
156 lines
8.9 KiB
Markdown
# Solar install — system map (shared reference for the solar skills)
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This file is the ground truth the `solar-*` / `troubleshoot-*` / `power-usage`
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skills build on. Read it once at the start of any solar task. Everything below
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was verified live on this host (the monitoring Pi) on 2026-06-23; re-verify
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anything load-bearing before acting on it.
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## Topology
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```
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6× EG4 LifePower4 v2 packs ──RS485 (1 FTDI each)──┐
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2× MPP Solar LVX6048 inverters ──USB-HID/PI18─────┤ this Pi ──MQTT──► HA broker
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1× OpenEVSE charger (10.0.0.249) ──its own WiFi───┘ (daemons) 10.0.0.41:1883
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```
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All telemetry lands on the **MQTT broker at 10.0.0.41:1883** under HA
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auto-discovery (`homeassistant/<class>/<entity>/config` retained, `.../state`
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republished each poll cycle — **state topics are NOT retained**, so to read
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current values you must listen for a window: use `lib/solar-snapshot`).
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Broker credentials live in `~/.config/powermon/powermon.yaml`
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(`mqttbroker.{name,port,username,password}`). **Never hardcode them** — every
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tool here reads them from that file. `lib/solar-snapshot` does too.
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## The snapshot helper
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`./lib/solar-snapshot` (relative to this skills dir) captures the latest value of
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every matching MQTT topic over a short window and prints a table. This is the
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primary read tool — prefer it over raw `mosquitto_sub`.
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```
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solar-snapshot [-w SECONDS] [-g GREP_RE] [-f] TOPIC_FILTER...
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```
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MQTT `+` matches one WHOLE level, so `lifepower4_+` matches nothing. Subscribe to
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`homeassistant/sensor/+/state` and narrow with `-g`:
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```
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solar-snapshot -g 'lvx6048_1_' 'homeassistant/sensor/+/state'
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solar-snapshot -w 16 -g 'lifepower4_[1-6]_soc/' 'homeassistant/sensor/+/state'
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solar-snapshot 'openevse/#' # EVSE publishes on-change; idle when unplugged
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```
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## The history helper
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`solar-snapshot` only sees *now*. For "when did X last happen / show last week",
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use `./lib/ha-history`, which queries **Home Assistant's recorder** (the only
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store that keeps history — local journald is volatile, ~1 day, wiped on reboot;
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no solar data goes to InfluxDB). Default window 7 days; HA recorder default
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retention is 10 days.
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```
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ha-history [-s SINCE] [-e END] [-m REGEX] [-a] ENTITY...
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ha-history -s "10 days ago" sensor.lvx6048_lvx6048_1_device_mode sensor.lvx6048_lvx6048_2_device_mode
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ha-history -s "10 days ago" -m fault sensor.lvx6048_01_lvx6048_1_fault_code sensor.lvx6048_02_lvx6048_2_fault_code
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```
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**HA entity_ids ≠ MQTT object names.** powermon's hass output doubles the device
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slug and is inconsistent across commands, so you must use the real ids, e.g.:
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- device mode: `sensor.lvx6048_lvx6048_{1,2}_device_mode` (device slug `lvx6048`)
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- fault code: `sensor.lvx6048_0{1,2}_lvx6048_{1,2}_fault_code` (slug `lvx6048_01`/`_02`)
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- PV/batt/load: `sensor.lvx6048_lvx6048_1_{mppt1_input_power,mppt1_input_voltage,battery_voltage,ac_output_active_power}`
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- EG4 packs follow the same doubling, e.g. `sensor.lifepower4_*`. When unsure, list
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them: `curl -s -H "Authorization: Bearer $(cat ~/.config/ha/token)" $HA/api/states
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| python3 -c 'import sys,json;[print(s["entity_id"]) for s in json.load(sys.stdin) if "lvx6048" in s["entity_id"]]'`
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Auth: reads a long-lived token from `~/.config/ha/token` (mode 600) or `$HA_TOKEN`
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— never on the command line, never hardcoded. Base URL `$HA_URL` else
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`~/.config/ha/url` else `http://10.0.0.41:8123`. If it reports "no token", the user
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must create one (HA → Profile → Security → Long-lived access tokens) and write it
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to `~/.config/ha/token`; tell them which file, don't ask them to paste it in chat.
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Recorder excludes (per `eg4battery/homeassistant/recorder.yaml`) drop EG4
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per-cell/register/string entities — those have no history; the inverter
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`device_mode`/`fault_code` and pack `soc`/`pack_voltage` etc. are recorded.
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## Services (this Pi)
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| Service | Role | Entities it feeds |
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|---|---|---|
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| `powermon.service` | LVX6048 #1 poller (PI18/USB) | `lvx6048_1_*` |
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| `powermon2.service` | LVX6048 #2 poller (PI18/USB) | `lvx6048_2_*` |
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| `lvx-resolve-links.service` | oneshot: maps `/dev/hidraw*` → `/dev/lvx6048-{1,2}` by PI18 serial; runs before powermon | (links) |
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| `lvx-control.service` | bridges `solar/control/lvx6048/*` → powermon adhoc queue | (control) |
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| `eg4-battery.service` | polls all 6 packs over RS485/Modbus | `lifepower4_1..6_*` |
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Quick health: `systemctl is-active powermon.service powermon2.service eg4-battery.service lvx-control.service`
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Logs: `journalctl -u <svc> --since "10 min ago" --no-pager`
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## Entities cheat-sheet
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**Inverters** `lvx6048_{1,2}_*` (PI18 GS/MOD/PIRI/FWS/ET):
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`device_mode` (Power-On/Standby/Bypass/Battery/Fault/Charge…), `fault_code`,
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`battery_voltage`, `battery_capacity` (%), `ac_output_active_power` (W),
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`ac_output_voltage`, `grid_voltage`, `mppt1_input_power`/`mppt2_input_power` (W, PV),
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`inverter_heat_sink_temperature`, `parallel_instance_number` (0 = master, 1+ = slave).
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**Packs** `lifepower4_{1..6}_*` (Modbus): `soc`, `soc_alt`, `pack_voltage`,
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`pack_current` (signed, + = charging), `cell_01..16_voltage`,
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`cell_voltage_delta_mv` (imbalance), `cell_voltage_min`/`max`, `capacity_ah`,
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`temperature_01..04`, `temperature_pcb`, `model`, `firmware_version`,
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`firmware_date`, warning/protection bits, `register_NN` raw. There are 16 cells/pack.
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**EVSE** `openevse/<key>` and `openevse_*` HA entities: `power` (W), `voltage`,
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`amp` (mA raw → A in HA), `pilot`, `max_current`, `session_energy` (Wh),
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`total_energy`, `status` (active/sleeping/disabled…), `state`, `temp`,
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`vehicle` (plug). Charger HTTP UI at http://10.0.0.249.
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Derived HA template sensors (`lifepower4_N_pack_power`, `_temperature_max`,
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`_cell_imbalance_pct`, `lifepower4_stack_*`) are computed **inside HA**, not on
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MQTT — compute them yourself from the raw entities when working off the Pi.
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## Known issues / gotchas (check memory for the canonical versions)
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- **Inverter `battery_voltage` is INTERMITTENTLY wrong** — read a correct ~54 V on
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2026-06-20 (verified via HA history), but ~9–10 V on 2026-06-23/24 after the Jun 22
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14:18 reboot, with packs steady at ~52–53 V throughout. So it's a post-reboot /
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re-init glitch (the inverter or PI18 GS field not settling after restart), NOT a
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permanent scaling bug. Implication: treat the inverter battery reading as
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untrustworthy and use the `lifepower4_*` pack entities for any battery math; if it
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reads ~10 V right now, a powermon (or inverter) restart may clear it — worth testing.
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- **Pack 6 is an oddball**: Modbus addr `0x01` @ 115200 (packs 1–5 are `0x40` @
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9600). It reads SoC high (76 % on 2026-06-24 vs 50–55 % on packs 1–5) — but at the
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SAME pack_voltage (53.4 V) and cell voltage (3.337 V), so that's **counter drift,
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not real imbalance**: all packs are paralleled and physically at the same charge.
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- **EG4 SoC never re-anchors** (drifts because packs rarely hit 100 % to reset the
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coulomb counter). Verified live via the equal-voltage/different-SoC signature above.
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Fix = the `calibration-charge` skill (periodic full charge). See memory
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`project_eg4_soc_drift_remediation`.
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- **RS485 daisy-chain silences slave packs** — each pack needs its own FTDI; an
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inter-pack chain demotes slaves. See memory `project_eg4_daisy_chain_silences_slaves`.
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- **No per-day inverter energy** — PI18 only gives `ET` (lifetime Wh); ED/EM/EY NAK.
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Daily kWh must come from HA recorder or ET deltas.
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- **Parallel cluster**: changing inverter settings on only one unit risks fault 86
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(desync). `lvx-control` always mirrors to both — that's why setters go through it.
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## Action policy for these skills
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**Allowed (safe remediation):**
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- Read anything: `solar-snapshot`, `mosquitto_sub`, `journalctl`, `systemctl status/is-active`.
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- Restart the data-plane daemons when they're wedged:
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`sudo systemctl restart powermon.service` / `powermon2.service` / `eg4-battery.service` / `lvx-control.service`
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- Recover inverter USB links: `sudo systemctl restart lvx-resolve-links.service`
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or `sudo /usr/local/sbin/lvx-resolve-links`.
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**Forbidden (escalate to the user instead — propose the exact command, don't run it):**
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- Any inverter/battery **setter**: `solar/control/lvx6048/*` publishes
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(charger priority, max charge current, output priority, …).
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- `lvx-flash/flash.py apply` and `dump`/`compare`/`sync-check` — they contend for
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exclusive USB and stop powermon; advanced, user-driven only.
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- Anything that writes battery thresholds, output mode, or factory resets.
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- Power-cycling hardware, moving cables, breaker changes.
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When a fix is outside the allowed set, report the finding and hand the user the
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precise command(s) to run.
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**Scoped exception — `calibration-charge` skill only:** that one skill may change
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exactly one setting (`stop_charge_voltage` → Full and back) via the prepared
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`eg4-lp4-v2-calibration.yaml` profile, on BOTH inverters, and ONLY after explicit
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in-session user confirmation, and it must REVERT afterward. No other skill and no
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other setting. This does not loosen the policy above for anything else.
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