working in production - not entirely validated. parallel mode working.

LVX6048/2026-04-26-lvx6048_1-dump

@@ -0,0 +1,39 @@
+# LVX6048 settings profile. Edit freely; all keys are optional.
+# `flash.py diff` previews changes; `flash.py apply --confirm` writes.
+#
+# skipped (read-only or out of settable range):
+#   max_charging_current=100 (max_charging_current=100 out of range [10, 80])
+
+# enum: AGM | FLOODED | USER
+battery_type: AGM
+
+# V 40.0..48.0 — hard shutdown; must be < stop_discharge_voltage. Only honored when battery_type=USER.
+cutoff_voltage: 40.8
+
+# V 44.0..51.0 — switch battery→grid below this (pair: stop_charge_voltage). Only honored when battery_type=USER.
+stop_discharge_voltage: 46.0
+
+# V 48.0..58.4 — CC→CV transition (pair: float_voltage; must be >= float_voltage). Only honored when battery_type=USER.
+bulk_voltage: 56.4
+
+# A 2,10,20,30,40,50,60,70,80 — grid-side cap only
+max_utility_charging_current: 30
+
+# enum: solar_utility_battery | solar_battery_utility
+output_source_priority: solar_battery_utility
+
+# enum: solar_first | solar_and_utility | solar_only
+charger_priority: solar_first
+
+# enum: battery_load_utility_ac | load_battery_utility
+solar_power_priority: battery_load_utility_ac
+
+# enum: enabled | disabled (PEI/PDI)
+grid_tie: disabled
+
+# V 0 (=Full) or 48.0..58.0 — switch grid→battery above this (pair: stop_discharge_voltage). Only honored when battery_type=USER.
+stop_charge_voltage: 54.0
+
+# V 48.0..58.4 — held while on grid (pair: bulk_voltage; must be <= bulk_voltage). Only honored when battery_type=USER.
+float_voltage: 54.0
+

LVX6048/2026-04-26-lvx6048_2-dump

@@ -0,0 +1,39 @@
+# LVX6048 settings profile. Edit freely; all keys are optional.
+# `flash.py diff` previews changes; `flash.py apply --confirm` writes.
+
+# enum: AGM | FLOODED | USER
+battery_type: AGM
+
+# V 40.0..48.0 — hard shutdown; must be < stop_discharge_voltage. Only honored when battery_type=USER.
+cutoff_voltage: 40.8
+
+# V 44.0..51.0 — switch battery→grid below this (pair: stop_charge_voltage). Only honored when battery_type=USER.
+stop_discharge_voltage: 46.0
+
+# V 48.0..58.4 — CC→CV transition (pair: float_voltage; must be >= float_voltage). Only honored when battery_type=USER.
+bulk_voltage: 56.4
+
+# A 2,10,20,30,40,50,60,70,80 — grid-side cap only
+max_utility_charging_current: 30
+
+# A 10,20,30,40,50,60,70,80 — combined solar+AC cap
+max_charging_current: 60
+
+# enum: solar_utility_battery | solar_battery_utility
+output_source_priority: solar_battery_utility
+
+# enum: solar_first | solar_and_utility | solar_only
+charger_priority: solar_first
+
+# enum: battery_load_utility_ac | load_battery_utility
+solar_power_priority: battery_load_utility_ac
+
+# enum: enabled | disabled (PEI/PDI)
+grid_tie: disabled
+
+# V 0 (=Full) or 48.0..58.0 — switch grid→battery above this (pair: stop_discharge_voltage). Only honored when battery_type=USER.
+stop_charge_voltage: 54.0
+
+# V 48.0..58.4 — held while on grid (pair: bulk_voltage; must be <= bulk_voltage). Only honored when battery_type=USER.
+float_voltage: 54.0
+

LVX6048/2026-04-26-parallel.md

@@ -0,0 +1,139 @@
+# 2026-04-26 (afternoon) — LVX6048 parallel-mode commissioning
+
+Got the two LVX6048 inverters operationally paralleled, sharing battery
+charge from the EG4 LP4 v2 bank symmetrically. Several discoveries about
+the firmware's parallel-state reporting along the way, plus a couple of
+small patches.
+
+## What happened
+
+1. **Firmware parity (main CPU): achieved.** Pre-flash main versions
+   were 06303 (unit 1) and 06440 (unit 2). User flashed both to
+   **06306** using the MPP Solar `InfiniVMasterCPU_Reflash` tool. Active
+   fault 71 ("Parallel version different") cleared.
+
+2. **Slave-CPU firmware: still skewed but benign.** Slaves remain
+   06126 / 06021. The vendor's `LVX6048 FW63.06.zip` *does* include a
+   `dsp.hex` slave bin, but the operational evidence (load-sharing,
+   matched battery V, no faults, master/slave handshake completing)
+   indicates the slave delta is not blocking parallel function on this
+   firmware family. **Not flashing the DSPs** — filed for the record only.
+
+3. **Battery wiring + commissioning.** Both inverters tied to the same
+   3× EG4 LP4 v2 100 Ah bank (300 Ah at 51.2 V nominal). After fault 83
+   ("Parallel battery voltage detect different") cleared on first
+   battery-connected boot, both inverters entered MOD `06` and began
+   sharing the charge load (~55 A each, ~110 A combined ≈ 0.37 C).
+
+4. **MCHGC mismatch (100 A vs 60 A) → fixed.** Unit 1 was at 100 A —
+   above the PI18 `MCHGC` setter's 80 A ceiling, so it had to be set
+   via the LCD (Program 02). User dropped unit 1 to 60 A so both
+   match. Confirmed via `flash.py compare` (12/12 settings match).
+
+5. **Patch (g) tweak — `outputformats/hass.py`** *(unrelated to parallel
+   work but lives in the same patch tree).* No change here today; the
+   morning's cleanup is in commit `f771ec2`.
+
+6. **Patch (h) — `pi18.py` MOD decoder.** Inverter started reporting
+   MOD code `06` after batteries connected; the existing decoder only
+   knew 00..05 and crashed (`KeyError: '06'`). Added `"06": "Charge"`.
+   The "Charge" label is an educated guess based on observed behavior
+   (active charging, no AC out); revisit if it turns up in unrelated
+   states.
+
+7. **`parallel_instance_number` decoder fixed.** The GS/PGS field is
+   the parallel-instance index per the PI18 spec (0 = master, 1+ =
+   slaves), not a 2-value flag — but powermon upstream (and our patch)
+   was decoding it as `["Not valid", "valid"]`, which made the master
+   appear as "Not valid" in HA. Replaced with an `OPTION` decoder
+   labeling each index ("instance 0 (master)", "instance 1", ...) in
+   both GS field 27 and PGS field 0. `flash.py sync-check` updated
+   accordingly: removed the false-positive "GS parallel_instance_number
+   = Not valid" issue, replaced with index-collision and no-master
+   checks.
+
+8. **`lvx-resolve-links` now auto-runs on USB hot-plug.** Added an
+   `ACTION=="add"` udev rule for vendor 0665 / product 5161 that
+   `RUN+=`s `systemctl --no-block restart lvx-resolve-links.service
+   powermon.service powermon2.service`. Powermon's `Requires=` /
+   `After=` already serialize the chain. Added a retry loop to the
+   resolver script (poll up to ~10 s for both expected serials) so a
+   single hidraw appearing slightly before its sibling doesn't leave a
+   symlink missing. Tested via `udevadm trigger --action=add
+   --subsystem-match=hidraw`: all three services restarted in lock-step
+   and symlinks rewrote cleanly.
+
+9. **Battery profile YAML for the bank.** Created
+   `lvx-flash/profiles/eg4-lp4-v2.yaml` capturing the conservative
+   off-grid LFP policy (USER mode, bulk 56.4 V / float 54.0 V, cutoff
+   48.0 V, stop-charge 54.0 V). Live state already matches — applying
+   would be a no-op. Kept as the canonical record of the chosen policy.
+
+10. **Sanity dumps** — `2026-04-26-lvx6048_{1,2}-dump` capture per-unit
+    settings post-commissioning. Useful as a baseline for diff-on-suspect.
+
+11. **Battery side: re-discovered that EG4 LP4 v2's inter-pack
+    daisy-chain silences slave packs.** User had wired the inter-pack
+    `Link-In/Link-Out` chain earlier in the day; it elects a master
+    and demotes slaves on their independent RS485 ports. Pulling the
+    chain restored all three packs to MQTT immediately (all reporting
+    54.62 V agreement). Daemon needed no change. Memorized for next
+    time.
+
+## Net effect
+
+| Metric | Before | After |
+|---|---|---|
+| Main-CPU firmware | 06303 / 06440 | **06306 / 06306** ✓ |
+| Slave-CPU firmware | 06126 / 06021 | unchanged (benign) |
+| Active fault 71 | yes | cleared |
+| Active fault 83 | n/a (no battery) | cleared |
+| MCHGC delta | 100 A vs 60 A | 60 A / 60 A ✓ |
+| Settings parity | mismatch | 12/12 match |
+| Charge-current sharing | n/a | 55 A / 57 A symmetric |
+| Battery V agreement | n/a | 55.1 V / 55.1 V identical |
+| `parallel_instance_number` | "Not valid" / "valid" (master mislabeled) | "instance 0 (master)" / "instance 1" |
+| MOD 06 crash on sync-check | yes | fixed |
+| Hot-plug symlink recovery | manual `systemctl restart` | automatic via udev `RUN+=` |
+
+## Files touched
+
+```
+M  LVX6048/powermon-patches/pi18.py            (MOD 06 -> "Charge"; parallel_instance_number decoder fix)
+M  LVX6048/lvx-flash/flash.py                  (parallel_instance_number index semantics; new sync-check rules)
+M  LVX6048/bin/lvx-resolve-links               (retry loop for hot-plug race)
+M  LVX6048/etc/udev/rules.d/99-lvx6048.rules   (ACTION=="add" RUN+= cascade)
+A  LVX6048/2026-04-26-lvx6048_1-dump           (post-commissioning baseline)
+A  LVX6048/2026-04-26-lvx6048_2-dump           (post-commissioning baseline)
+A  LVX6048/lvx-flash/profiles/eg4-lp4-v2.yaml  (canonical battery profile)
+A  LVX6048/2026-04-26-parallel.md              (this file)
+```
+
+## How to verify
+
+```bash
+sudo systemctl stop powermon.service powermon2.service
+sudo systemctl restart lvx-resolve-links.service   # always run after inverter power-cycle
+/home/noise/solar/LVX6048/lvx-flash/flash.py sync-check \
+    --device-a /dev/lvx6048-1 --device-b /dev/lvx6048-2
+sudo systemctl start powermon.service powermon2.service
+```
+
+Pass criteria post-commissioning:
+- main fw 06306 on both
+- `mode=06` (Charge) or `mode=03` (Battery) or `mode=05` (Hybrid) — i.e. healthy operating modes, no `04` (Fault)
+- `fault=No fault` on both
+- both `parallel_*` values present (one as master/0, one as slave/1)
+- battery V agreement within ~0.2 V
+- charge currents within ~5 A symmetric (when both are charging)
+
+## Loose ends / next pass
+
+1. update `LVX6048/README.md` "Next steps" section to reflect that
+   parallel commissioning + decoder + hot-plug fixes are done, and
+   the slave-firmware delta is intentionally unrepaired (benign)
+2. (optional) verify MOD 06 label by observing in different states
+3. (optional) decode remaining PGS fields now that values are meaningful
+4. (optional, longer horizon) closed-loop BMS comms via the dedicated
+   pack→inverter CAN port; defer until open-loop has been stable for a
+   week and we can baseline SoC accuracy

LVX6048/bin/lvx-resolve-links

@@ -63,19 +63,35 @@ def _relink(link: str, target: str) -> None:
 
 
 async def main() -> int:
-    candidates = sorted(glob.glob("/dev/hidraw*"))
-    if not candidates:
-        print("no /dev/hidraw* devices present", file=sys.stderr)
-        return 1
-
+    # Hot-plug case: udev fires this script as soon as one hidraw appears, but
+    # a sibling inverter coming up at nearly the same moment may still be
+    # enumerating. Retry-probe up to ~10 s waiting for all expected serials,
+    # so a transient single-device sighting doesn't leave one symlink missing.
+    expected = set(LINK_FOR_SERIAL.keys())
+    deadline = asyncio.get_event_loop().time() + 10.0
     sn_to_path: dict[str, str] = {}
+    seen_paths: set[str] = set()
+    while True:
+        candidates = sorted(glob.glob("/dev/hidraw*"))
         for p in candidates:
+            if p in seen_paths:
+                continue
+            seen_paths.add(p)
             sn = await probe_serial(p)
             if sn:
                 print(f"{p}: serial {sn}")
                 sn_to_path[sn] = p
             else:
                 print(f"{p}: no PI18 response (probably not an LVX6048)")
+        if expected.issubset(sn_to_path):
+            break
+        if asyncio.get_event_loop().time() >= deadline:
+            break
+        await asyncio.sleep(0.5)
+
+    if not sn_to_path:
+        print("no LVX6048 devices found on /dev/hidraw*", file=sys.stderr)
+        return 1
 
     missing = []
     for sn, link in LINK_FOR_SERIAL.items():

LVX6048/etc/udev/rules.d/99-lvx6048.rules

@@ -1,6 +1,13 @@
 # LVX6048 (MPP Solar / Voltronic) USB-HID — dialout access only.
-# Logical unit identification is done via PI18 `ID` query at powermon startup
-# (see powermon.yaml: path: /dev/hidraw*, serial_number: <SN>).
-# No SYMLINK here — powermon resolves the right /dev/hidrawN by inverter serial,
-# which survives cable moves / hub port changes.
+# Logical unit identification is done via the lvx-resolve-links oneshot, which
+# reads each inverter's PI18 serial and writes /dev/lvx6048-{1,2} symlinks.
+# powermon services have Requires=lvx-resolve-links so they wait for it at boot.
 SUBSYSTEM=="hidraw", ATTRS{idVendor}=="0665", ATTRS{idProduct}=="5161", MODE="0660", GROUP="dialout"
+
+# Hot-plug recovery: when an inverter re-enumerates (e.g. after a power cycle),
+# hidraw indices can shuffle, leaving /dev/lvx6048-{1,2} symlinks pointing at
+# the wrong physical unit. Re-run the resolver and bounce the powermon services
+# so HA stops receiving crossed-up entity data. Fires only on add (avoid double
+# restart on disconnect+reconnect).
+SUBSYSTEM=="hidraw", ACTION=="add", ATTRS{idVendor}=="0665", ATTRS{idProduct}=="5161", \
+    RUN+="/bin/systemctl --no-block restart lvx-resolve-links.service powermon.service powermon2.service"

LVX6048/lvx-flash/flash.py

@@ -544,7 +544,7 @@ FAULT_NAMES = {
 # GS field indices (see powermon/protocols/pi18.py :: QUERY_COMMANDS["GS"])
 GS_AC_OUTPUT_V = 2
 GS_AC_OUTPUT_HZ = 3
-GS_PARALLEL_VALID = 27
+GS_PARALLEL_INDEX = 27   # 0 = master, 1+ = slaves; one unit per cluster reports 0
 
 
 async def _read_raw_parts(port: USBPort, code: str, retries: int = 3) -> list[str]:
@@ -574,7 +574,7 @@ async def _snapshot_sync(path: str) -> dict[str, Any]:
     finally:
         await port.disconnect()
     return {
-        "parallel_valid": gs[GS_PARALLEL_VALID] == "1",
+        "parallel_index": int(gs[GS_PARALLEL_INDEX]),
         "ac_output_v": _tenths_to_v(gs[GS_AC_OUTPUT_V]),
         "ac_output_hz": int(gs[GS_AC_OUTPUT_HZ]) / 10.0,
         "fault_code": fws[0],
@@ -593,9 +593,10 @@ async def cmd_sync_check(args) -> int:
     b = await _snapshot_sync(path_b)
 
     def _row(label: str, s: dict) -> str:
-        valid = "valid" if s["parallel_valid"] else "NOT VALID"
+        idx = s["parallel_index"]
+        role = f"instance {idx}{' (master)' if idx == 0 else ''}"
         return (f"{label}: fw={s['main_cpu']}/{s['slave_cpu']}  mode={s['mode']}  "
-                f"parallel={valid}  fault={s['fault_name']}  "
+                f"parallel={role}  fault={s['fault_name']}  "
                 f"vac={s['ac_output_v']}V  fac={s['ac_output_hz']}Hz")
 
     print(_row(path_a, a))
@@ -604,10 +605,10 @@ async def cmd_sync_check(args) -> int:
     issues: list[str] = []
     if a["main_cpu"] != b["main_cpu"] or a["slave_cpu"] != b["slave_cpu"]:
         issues.append(f"firmware mismatch: {a['main_cpu']}/{a['slave_cpu']} vs {b['main_cpu']}/{b['slave_cpu']} — parallel requires matching firmware on both units")
-    if not a["parallel_valid"]:
-        issues.append(f"{path_a}: GS parallel_instance_number = Not valid")
-    if not b["parallel_valid"]:
-        issues.append(f"{path_b}: GS parallel_instance_number = Not valid")
+    if a["parallel_index"] == b["parallel_index"]:
+        issues.append(f"both units report the same parallel instance index ({a['parallel_index']}); should differ — cluster handshake incomplete")
+    if 0 not in (a["parallel_index"], b["parallel_index"]):
+        issues.append(f"neither unit reports instance 0 — cluster has no elected master (got {a['parallel_index']}, {b['parallel_index']})")
     if a["fault_code"] != "00":
         issues.append(f"{path_a}: active fault {a['fault_code']} ({a['fault_name']})")
     if b["fault_code"] != "00":

LVX6048/lvx-flash/profiles/eg4-lp4-v2.yaml

@@ -0,0 +1,59 @@
+# LVX6048 settings profile — EG4 LifePower4 v2 LiFePO4 bank, open-loop.
+#
+# Designed for: 3× EG4 LP4 v2 100 Ah in parallel (300 Ah, ~15.4 kWh).
+# Apply identically to both inverters in a parallel pair:
+#   sudo systemctl stop powermon.service powermon2.service
+#   ./flash.py apply --device /dev/lvx6048-1 --profile profiles/eg4-lp4-v2.yaml --confirm
+#   ./flash.py apply --device /dev/lvx6048-2 --profile profiles/eg4-lp4-v2.yaml --confirm
+#   sudo systemctl start powermon.service powermon2.service
+#   ./flash.py compare --device-a /dev/lvx6048-1 --device-b /dev/lvx6048-2
+#   ./flash.py sync-check --device-a /dev/lvx6048-1 --device-b /dev/lvx6048-2
+#
+# Voltage rationale (16S LFP, 3.2 V/cell nominal = 51.2 V pack):
+#   bulk         56.4 V = 3.525 V/cell — long-life sweet spot for LFP
+#   float        54.0 V = 3.375 V/cell — rest near mid-knee, avoid sitting on the top
+#   stop_charge  54.0 V — grid charges only to ~mid-knee; solar handles the bulk top-off
+#   stop_dis     48.0 V = 3.000 V/cell — soft "switch to grid" point
+#   cutoff       48.0 V = 3.000 V/cell — inverter hard shutdown floor (BMS still protects below)
+# Conservative off-grid policy: keep grid as a soft top-up, let solar do the bulk work.
+#
+# Current rationale (300 Ah bank):
+#   60 A/unit × 2 units = 120 A combined ≈ 0.4 C — well under bank's continuous spec
+#   30 A/unit MUCHGC keeps grid-charging conservative (60 A combined)
+
+# enum: AGM | FLOODED | USER
+# USER required to enable the per-cell custom voltages below.
+battery_type: USER
+
+# V 40.0..48.0 — hard shutdown; must be < stop_discharge_voltage.
+cutoff_voltage: 48.0
+
+# V 44.0..51.0 — switch battery→grid below this (pair: stop_charge_voltage).
+stop_discharge_voltage: 48.0
+
+# V 0 (=Full) or 48.0..58.0 — switch grid→battery above this. 0 = let bulk define.
+stop_charge_voltage: 54.0
+
+# V 48.0..58.4 — CC→CV transition (pair: float_voltage; must be >= float_voltage).
+bulk_voltage: 56.4
+
+# V 48.0..58.4 — held while on grid (pair: bulk_voltage; must be <= bulk_voltage).
+float_voltage: 54.0
+
+# A 10,20,30,40,50,60,70,80 — combined solar+AC cap, per unit.
+max_charging_current: 60
+
+# A 2,10,20,30,40,50,60,70,80 — grid-side cap, per unit.
+max_utility_charging_current: 30
+
+# enum: solar_utility_battery | solar_battery_utility
+output_source_priority: solar_battery_utility
+
+# enum: solar_first | solar_and_utility | solar_only
+charger_priority: solar_first
+
+# enum: battery_load_utility_ac | load_battery_utility
+solar_power_priority: battery_load_utility_ac
+
+# enum: enabled | disabled (PEI/PDI)
+grid_tie: disabled

LVX6048/powermon-patches/pi18.py

@@ -336,9 +336,23 @@ QUERY_COMMANDS = {
                     "2": "output",
                 },
             },
+            # Parallel-cluster index. PI18 spec: 0 = master, 1+ = slaves.
+            # Upstream powermon labels this as a 2-value flag ["Not valid", "valid"]
+            # which is wrong — masters end up labeled "Not valid". Fixed to expose
+            # the actual index. Range covers up to max_parallel_units (typ. 9).
             {"description": "Parallel instance number", "reading_type": ReadingType.MESSAGE,
-                "response_type": ResponseType.LIST,
-                "options": ["Not valid", "valid"],
+                "response_type": ResponseType.OPTION,
+                "options": {
+                    "0": "instance 0 (master)",
+                    "1": "instance 1",
+                    "2": "instance 2",
+                    "3": "instance 3",
+                    "4": "instance 4",
+                    "5": "instance 5",
+                    "6": "instance 6",
+                    "7": "instance 7",
+                    "8": "instance 8",
+                },
             },
 
         ],
@@ -362,6 +376,7 @@ QUERY_COMMANDS = {
                     "03": "Battery",
                     "04": "Fault",
                     "05": "Hybrid mode(Line mode, Grid mode)",
+                    "06": "Charge",
                 }
             },
         ],
@@ -523,8 +538,10 @@ QUERY_COMMANDS = {
         "command_type": CommandType.PI18_QUERY,
         "result_type": ResultType.COMMA_DELIMITED,
         "reading_definitions": [
+            # See note on the matching field in GS — same fix here.
             {"description": "Parallel instance number", "reading_type": ReadingType.MESSAGE,
-                "response_type": ResponseType.LIST, "options": ["Not valid", "valid"]},
+                "response_type": ResponseType.OPTION,
+                "options": {str(i): f"instance {i}{' (master)' if i == 0 else ''}" for i in range(9)}},
             {"description": "Parallel unit count", "reading_type": ReadingType.MESSAGE},
             {"description": "Fault code", "reading_type": ReadingType.MESSAGE},
             {"description": "Field 4 (raw)", "reading_type": ReadingType.MESSAGE},