From ebe064ad973f5c66a09931f0f3c0a2d656911e4f Mon Sep 17 00:00:00 2001
From: andig <andi@evcc.io>
Date: Sat, 22 Aug 2026 13:47:27 +0200
Subject: [PATCH] Loadpoint: disable PV mode when idle integrated device lacks
 surplus (#33073)

---
 core/loadpoint.go              |  5 +++
 core/loadpoint_test.go         | 59 ++++++++++++++++++++++++++++++++++
 core/loadpoint_vehicle_test.go |  9 ++++++
 3 files changed, 73 insertions(+)

diff --git a/core/loadpoint.go b/core/loadpoint.go
index 85ce2e0f3..aa12b2320 100644
--- a/core/loadpoint.go
+++ b/core/loadpoint.go
@@ -1657,6 +1657,11 @@ func (lp *Loadpoint) pvMaxCurrent(mode api.ChargeMode, sitePower, batteryPower f
 			// notes: activePhases can be 1, 2 or 3 and phaseTimer can only be active if lp current is already at minCurrent
 			projectedSitePower -= Voltage * minCurrent * float64(activePhases-1)
 		}
+		// a continuous device that is enabled but not consuming keeps its demand out
+		// of site power, hiding insufficient surplus until it starts (#32282)
+		if lp.chargerHasFeature(api.Continuous) && !lp.charging() {
+			projectedSitePower += currentToPower(minCurrent, lp.minActivePhases())
+		}
 		// kick off disable sequence, unless climater keep-alive is holding
 		// charging at minCurrent — otherwise the "pausing soon" badge would
 		// flash on/off forever while climater is active (issue #29834).
diff --git a/core/loadpoint_test.go b/core/loadpoint_test.go
index ccb160dcf..41f11aae3 100644
--- a/core/loadpoint_test.go
+++ b/core/loadpoint_test.go
@@ -908,3 +908,62 @@ func TestNewLoadpointFromConfigDisabledVehicle(t *testing.T) {
 	// disabled vehicle is filtered from instances
 	require.Empty(t, config.Instances(config.Vehicles().Devices()))
 }
+
+// TestPVDisableIdleContinuousDevice is a regression test for #32282: a continuous
+// device that is enabled but not consuming (heat pump boost signalled, compressor
+// idle) does not show its demand in site power. Without projecting it, the disable
+// gate only trips on grid consumption which the idle device never causes.
+func TestPVDisableIdleContinuousDevice(t *testing.T) {
+	const dt = time.Minute
+
+	tc := []struct {
+		name        string
+		status      api.ChargeStatus
+		chargePower float64
+		site        float64
+		current     float64
+	}{
+		// idle device, export below its 600W demand: disable
+		{"idle, insufficient surplus", api.StatusB, 0, -400, 0},
+		// idle device, export covers its demand: keep enabled
+		{"idle, sufficient surplus", api.StatusB, 0, -700, 7},
+		// consuming device: measured power reflects demand, keep lenient hysteresis
+		{"consuming, exporting", api.StatusC, 300, -200, minA},
+	}
+
+	for _, tc := range tc {
+		t.Run(tc.name, func(t *testing.T) {
+			clock := clock.NewMock()
+
+			Voltage = 100
+			lp := &Loadpoint{
+				log:              util.NewLogger("foo"),
+				clock:            clock,
+				charger:          &continuousCharger{},
+				minCurrent:       minA,
+				maxCurrent:       maxA,
+				phases:           1,
+				phasesConfigured: 1,
+				measuredPhases:   1,
+				status:           tc.status,
+				enabled:          true,
+				chargePower:      tc.chargePower,
+				Disable:          loadpoint.ThresholdConfig{Delay: dt},
+			}
+
+			start := clock.Now()
+			for _, delay := range []time.Duration{0, dt + 1} {
+				clock.Set(start.Add(delay))
+				current := lp.pvMaxCurrent(api.ModePV, tc.site, 0, false, false)
+
+				// before the disable delay elapses the device keeps running
+				if delay == 0 {
+					assert.Equal(t, max(tc.current, minA), current, "before disable delay")
+					continue
+				}
+
+				assert.Equal(t, tc.current, current, "after disable delay")
+			}
+		})
+	}
+}
diff --git a/core/loadpoint_vehicle_test.go b/core/loadpoint_vehicle_test.go
index 7db0ed926..b5c9c4d8d 100644
--- a/core/loadpoint_vehicle_test.go
+++ b/core/loadpoint_vehicle_test.go
@@ -464,6 +464,15 @@ func (c *integratedDeviceCharger) Features() []api.Feature {
 	return []api.Feature{api.IntegratedDevice}
 }
 
+// continuousCharger is a minimal charger advertising the Continuous feature.
+type continuousCharger struct {
+	integratedDeviceCharger
+}
+
+func (c *continuousCharger) Features() []api.Feature {
+	return []api.Feature{api.IntegratedDevice, api.Continuous}
+}
+
 // TestDisconnectIntegratedDeviceKeepsMode is a regression test for #30187:
 // switching an integrated-device loadpoint to "off" makes a switch socket report
 // StatusA (disconnect). The disconnect handler must NOT reset the mode to the