diff --git a/.changeset/pixii-pv-sunset.md b/.changeset/pixii-pv-sunset.md
new file mode 100644
index 00000000..808238b5
--- /dev/null
+++ b/.changeset/pixii-pv-sunset.md
@@ -0,0 +1,7 @@
+---
+"ftw": patch
+---
+
+Update the bundled Pixii drivers. Fresh negative PV totals now report zero
+generation instead of leaving solar stale or missing after sunset. The battery
+driver also recovers when Pixii starts after FTW or returns after an outage.
diff --git a/drivers/BUNDLED_SOURCE.json b/drivers/BUNDLED_SOURCE.json
index 811600f4..40d02e1f 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": "afc9739dd19920246cadaa5135baa85485840528",
+  "commit": "76ddd5846f18cb1a0d53d85508904d4e953421b2",
   "source_dir": "drivers/lua",
   "drivers": [
     "ambibox_v2x", "ctek", "ctek_hybrid", "ctek_v2", "deye", "easee_cloud",
diff --git a/go/internal/drivers/pixii_driver_test.go b/go/internal/drivers/pixii_driver_test.go
index a93c06f4..18419d12 100644
--- a/go/internal/drivers/pixii_driver_test.go
+++ b/go/internal/drivers/pixii_driver_test.go
@@ -308,7 +308,7 @@ func (m *gatedPixiiModbus) WriteMulti(addr uint16, values []uint16) error {
 
 func (m *gatedPixiiModbus) Close() error { return m.inner.Close() }
 
-func TestPixiiRecoversAfterTransportGiveUp(t *testing.T) {
+func TestPixiiRecoversAfterTransportOutage(t *testing.T) {
 	path := filepath.Join("..", "..", "..", "drivers", "pixii.lua")
 	tel := telemetry.NewStore()
 	inner := newPixiiTestModbus()
@@ -329,7 +329,8 @@ func TestPixiiRecoversAfterTransportGiveUp(t *testing.T) {
 	if _, err := d.Poll(context.Background()); err != nil {
 		t.Fatalf("live poll: %v", err)
 	}
-	if tel.Get("pixii", telemetry.DerBattery) == nil {
+	before := tel.Get("pixii", telemetry.DerBattery)
+	if before == nil {
 		t.Fatal("expected battery telemetry before the blip")
 	}
 
@@ -338,19 +339,25 @@ func TestPixiiRecoversAfterTransportGiveUp(t *testing.T) {
 		if _, err := d.Poll(context.Background()); err == nil {
 			t.Fatalf("outage poll %d succeeded", poll)
 		}
+		if got := tel.Get("pixii", telemetry.DerBattery); got == nil || !got.UpdatedAt.Equal(before.UpdatedAt) {
+			t.Fatalf("outage poll %d refreshed battery telemetry: %+v", poll, got)
+		}
 	}
 
 	bus.setDown(false)
 	if _, err := d.Poll(context.Background()); err != nil {
 		t.Fatalf("recovery poll after Modbus returned: %v", err)
 	}
-	if d.reprobes() != 1 {
-		t.Fatalf("reprobes = %d, want 1: pixii.lua gives up every register after 3 misses", d.reprobes())
+	if d.reprobes() != 0 {
+		t.Fatalf("reprobes = %d, want 0: Pixii should recover without reloading the driver", d.reprobes())
 	}
 	got := tel.Get("pixii", telemetry.DerBattery)
 	if got == nil || got.SoC == nil || *got.SoC != 0.94 {
 		t.Fatalf("recovered battery = %+v, want SoC 0.94", got)
 	}
+	if !got.UpdatedAt.After(before.UpdatedAt) {
+		t.Fatal("recovery poll did not refresh battery telemetry")
+	}
 	h := tel.DriverHealth("pixii")
 	if h == nil || h.DeviceFault || !h.IsOnline() {
 		t.Fatalf("expected online Pixii after the blip, got %+v", h)
diff --git a/go/internal/drivers/pixii_pv_driver_test.go b/go/internal/drivers/pixii_pv_driver_test.go
new file mode 100644
index 00000000..477dfbe2
--- /dev/null
+++ b/go/internal/drivers/pixii_pv_driver_test.go
@@ -0,0 +1,64 @@
+package drivers
+
+import (
+	"context"
+	"testing"
+
+	"github.com/srcfl/ftw/go/internal/telemetry"
+)
+
+func TestPixiiPVSunsetReadingsStayFresh(t *testing.T) {
+	const name = "pixii-pv-test"
+	const topic = "pixii/status/test-pixii/meter_ext6"
+	tel := telemetry.NewStore()
+	mqtt := &fakeMQTT{}
+	d := newBundledMQTTDriver(t, "pixii_pv.lua", name, tel, mqtt, nil)
+
+	steps := []struct {
+		name       string
+		topic      string
+		payload    string
+		wantW      float64
+		wantUpdate bool
+	}{
+		{"missing before first reading", topic, `{"meter_source":"PV","meter_w1":0,"meter_w2":0}`, 0, false},
+		{"day", topic, `{"meter_source":"PV","meter_w1":1000,"meter_w2":2000,"meter_w3":3000}`, -6000, true},
+		{"sunset", topic, `{"meter_source":"PV","meter_w1":-1,"meter_w2":-2,"meter_w3":-3}`, 0, true},
+		{"night", topic, `{"meter_source":"PV","meter_w1":-1,"meter_w2":-2,"meter_w3":-3}`, 0, true},
+		{"mixed phases", topic, `{"meter_source":"PV","meter_w1":50,"meter_w2":-3,"meter_w3":-2}`, -45, true},
+		{"missing phase", topic, `{"meter_source":"PV","meter_w1":0,"meter_w2":0}`, -45, false},
+		{"invalid phase", topic, `{"meter_source":"PV","meter_w1":"bad","meter_w2":0,"meter_w3":0}`, -45, false},
+		{"idle", "", "", -45, false},
+		{"grid only", "pixii/status/test-pixii/meter", `{"meter_w":-750}`, -45, false},
+		{"morning", topic, `{"meter_source":"PV","meter_w1":500,"meter_w2":500,"meter_w3":500}`, -1500, true},
+	}
+	for _, step := range steps {
+		before := tel.Get(name, telemetry.DerPV)
+		if step.topic != "" {
+			mqtt.Push(step.topic, step.payload)
+		}
+		if _, err := d.Poll(context.Background()); err != nil {
+			t.Fatalf("%s: poll: %v", step.name, err)
+		}
+		after := tel.Get(name, telemetry.DerPV)
+		if before == nil && !step.wantUpdate {
+			if after != nil {
+				t.Fatalf("%s: emitted PV without complete power: %+v", step.name, after)
+			}
+			continue
+		}
+		if after == nil || after.RawW != step.wantW {
+			t.Fatalf("%s: PV = %+v, want %.0f W", step.name, after, step.wantW)
+		}
+		if step.wantUpdate {
+			if before != nil && !after.UpdatedAt.After(before.UpdatedAt) {
+				t.Fatalf("%s: fresh MQTT did not refresh PV", step.name)
+			}
+		} else if !after.UpdatedAt.Equal(before.UpdatedAt) {
+			t.Fatalf("%s: PV refreshed without a valid PV reading", step.name)
+		}
+	}
+	if meter := tel.Get(name, telemetry.DerMeter); meter == nil || meter.RawW != -750 {
+		t.Fatalf("grid export = %+v, want -750 W", meter)
+	}
+}