diff --git a/.changeset/pixii-unknown-status.md b/.changeset/pixii-unknown-status.md
new file mode 100644
index 00000000..862924ca
--- /dev/null
+++ b/.changeset/pixii-unknown-status.md
@@ -0,0 +1,7 @@
+---
+"ftw": patch
+---
+
+Bundle Pixii 2.1.6 so an unsupported or unknown charge status cannot clear a
+known calibration fault. Keep battery and meter readings available while
+reporting the missing status.
diff --git a/drivers/BUNDLED_SOURCE.json b/drivers/BUNDLED_SOURCE.json
index 97b2c4c1..a01d7afe 100644
--- a/drivers/BUNDLED_SOURCE.json
+++ b/drivers/BUNDLED_SOURCE.json
@@ -16,7 +16,7 @@
     "from the signed channel. Run scripts/sync-bundled-drivers.sh to update."
   ],
   "repository": "srcfl/device-drivers",
-  "commit": "92adaf074f54a20f872ab84ae34c2cac45528f04",
+  "commit": "7e572fb499dda7acf6f1212b8b0b78235b9d3ba9",
   "source_dir": "drivers/lua",
   "drivers": [
     "ambibox_v2x", "ctek", "ctek_hybrid", "ctek_v2", "deye", "easee_cloud",
diff --git a/go/internal/drivers/pixii_unknown_status_test.go b/go/internal/drivers/pixii_unknown_status_test.go
new file mode 100644
index 00000000..9b645da8
--- /dev/null
+++ b/go/internal/drivers/pixii_unknown_status_test.go
@@ -0,0 +1,57 @@
+package drivers
+
+import (
+	"context"
+	"encoding/json"
+	"path/filepath"
+	"testing"
+
+	"github.com/srcfl/ftw/go/internal/telemetry"
+)
+
+// Exercise the bundled Lua in FTW's host, including its persistent fault state.
+func TestPixiiUnknownStatusPreservesCalibrationFault(t *testing.T) {
+	tel := telemetry.NewStore()
+	modbus := newPixiiTestModbus()
+	env := NewHostEnv("pixii", tel).WithModbus(modbus)
+	env.BatteryCapacityWh = 10000
+	d, err := NewLuaDriver(filepath.Join("..", "..", "..", "drivers", "pixii.lua"), env)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer d.Cleanup()
+	if err := d.Init(context.Background(), nil); err != nil {
+		t.Fatal(err)
+	}
+	for _, step := range []struct {
+		code  uint16
+		fault bool
+		label string
+	}{
+		{0xffff, false, "unknown"},
+		{7, true, "testing"},
+		{0xffff, true, "unknown"},
+		{99, true, "unknown_99"},
+		{4, false, "charging"},
+	} {
+		modbus.regs[40137] = step.code
+		if _, err := d.Poll(context.Background()); err != nil {
+			t.Fatal(err)
+		}
+		health := tel.DriverHealth("pixii")
+		if health == nil || health.DeviceFault != step.fault || health.IsOnline() == step.fault {
+			t.Fatalf("charge status %d: health = %+v, want fault=%v", step.code, health, step.fault)
+		}
+		reading := tel.Get("pixii", telemetry.DerBattery)
+		if reading == nil || tel.Get("pixii", telemetry.DerMeter) == nil {
+			t.Fatal("lost battery or meter telemetry")
+		}
+		var data map[string]any
+		if err := json.Unmarshal(reading.Data, &data); err != nil {
+			t.Fatal(err)
+		}
+		if data["charge_status"] != step.label {
+			t.Fatalf("charge status %d: label=%v, want %s", step.code, data["charge_status"], step.label)
+		}
+	}
+}