diff --git a/core/loadpoint.go b/core/loadpoint.go
index 20be0a02d..5b8bebff3 100644
--- a/core/loadpoint.go
+++ b/core/loadpoint.go
@@ -1590,6 +1590,16 @@ func (lp *Loadpoint) boostPower(batteryPower float64) float64 {
 		delta += lp.EffectiveStepPower()
 	}
 
+	// bridge the power gap between 1p max and 3p min so pvScalePhases can trigger a scale-up
+	if lp.hasPhaseSwitching() && lp.phaseSwitchCompleted() && lp.site.GetBatteryMaxDischargePower() != nil {
+		if activePhases, maxPhases := lp.ActivePhases(), lp.MaxActivePhases(); activePhases < maxPhases &&
+			lp.circuitAllowsPhases(maxPhases, lp.effectiveMinCurrent()) {
+			// max power actually achievable on the active phases
+			activeMaxPower := min(lp.EffectiveMaxPower(), Voltage*lp.effectiveMaxCurrent()*float64(activePhases))
+			delta += max(0, lp.EffectiveMinPower()*float64(maxPhases)-activeMaxPower)
+		}
+	}
+
 	// start boosting by setting maximum power
 	if boost == boostStart {
 		delta = lp.EffectiveMaxPower()
diff --git a/core/loadpoint_boost_test.go b/core/loadpoint_boost_test.go
index df0bad18a..c05d917dc 100644
--- a/core/loadpoint_boost_test.go
+++ b/core/loadpoint_boost_test.go
@@ -2,11 +2,13 @@ package core
 
 import (
 	"testing"
+	"time"
 
 	"github.com/evcc-io/evcc/api"
 	"github.com/evcc-io/evcc/core/site"
 	"github.com/evcc-io/evcc/util"
 	"github.com/stretchr/testify/assert"
+	"go.uber.org/mock/gomock"
 )
 
 type mockSite struct {
@@ -104,3 +106,121 @@ func TestBoostPower(t *testing.T) {
 	// res = max(0, -2000) + 790 + 0 = 790W
 	assert.Equal(t, 790.0, res)
 }
+
+type plainCharger struct {
+	api.Charger
+}
+
+type phaseSwitchCharger struct {
+	api.Charger
+}
+
+func (phaseSwitchCharger) Phases1p3p(int) error { return nil }
+
+func TestBoostPowerPhaseSwitchGapBridging(t *testing.T) {
+	Voltage = 230
+	lp := &Loadpoint{
+		log:              util.NewLogger("lp"),
+		status:           api.StatusC,
+		charger:          phaseSwitchCharger{},
+		batteryBoost:     boostContinue,
+		minCurrent:       6,
+		maxCurrent:       16,
+		phases:           1,
+		phasesConfigured: 3,
+	}
+	s := &mockSite{}
+	lp.site = s
+
+	// boostContinue on 1p with phase switching: delta must cover the gap
+	// between 1p@16A (3680W) and 3p@6A (4140W) = 460W, plus the
+	// base delta (100W) and coarse step power (1p: 230W)
+	limit := 10000.0
+	s.maxDischargePower = &limit
+	s.residualPower = 0
+	res := lp.boostPower(0)
+	// delta = 100 (base) + 230 (step@1p) + 460 (gap) = 790
+	// res = 0 + 790 + 0 = 790
+	assert.Equal(t, 790.0, res)
+	// verify gap alone exceeds the 3p minimum threshold
+	// available_power ≈ chargePower(3680) + boostReturn(790) = 4470 > 4140
+	assert.Greater(t, Voltage*16+res, Voltage*6*3, "boost must bridge 1p-3p gap")
+
+	// already on 3p: no phase gap added, only base + step
+	lp.phases = 3
+	res = lp.boostPower(0)
+	// delta = 100 + 690 (step@3p) = 790
+	assert.Equal(t, 790.0, res)
+}
+
+func TestBoostPowerPhaseSwitchGapBridgingExclusions(t *testing.T) {
+	Voltage = 230
+	limit10k := 10000.0
+	now := time.Now()
+
+	for _, tc := range []struct {
+		name              string
+		charger           api.Charger
+		phasesSwitched    time.Time
+		maxDischargePower *float64
+		circuitPower      float64
+		expected          float64
+	}{
+		{
+			name:              "no phase switching",
+			charger:           plainCharger{},
+			maxDischargePower: &limit10k,
+			circuitPower:      10000,
+			expected:          330,
+		},
+		{
+			name:              "phase switch not completed",
+			charger:           phaseSwitchCharger{},
+			phasesSwitched:    now,
+			maxDischargePower: &limit10k,
+			circuitPower:      10000,
+			expected:          330,
+		},
+		{
+			name:              "no max discharge power limit",
+			charger:           phaseSwitchCharger{},
+			maxDischargePower: nil,
+			circuitPower:      10000,
+			expected:          330,
+		},
+		{
+			name:              "circuit not allowing 3p",
+			charger:           phaseSwitchCharger{},
+			maxDischargePower: &limit10k,
+			circuitPower:      0,
+			expected:          330,
+		},
+	} {
+		t.Run(tc.name, func(t *testing.T) {
+			ctrl := gomock.NewController(t)
+
+			circuit := api.NewMockCircuit(ctrl)
+			circuit.EXPECT().ValidatePower(gomock.Any(), gomock.Any()).Return(tc.circuitPower).AnyTimes()
+
+			lp := &Loadpoint{
+				log:              util.NewLogger("lp"),
+				status:           api.StatusC,
+				charger:          tc.charger,
+				batteryBoost:     boostContinue,
+				minCurrent:       6,
+				maxCurrent:       16,
+				phases:           1,
+				phasesConfigured: 3,
+				phasesSwitched:   tc.phasesSwitched,
+				circuit:          circuit,
+			}
+			s := &mockSite{
+				maxDischargePower: tc.maxDischargePower,
+			}
+			lp.site = s
+
+			res := lp.boostPower(0)
+			assert.Equal(t, tc.expected, res)
+		})
+	}
+}