diff --git a/api/tariff.go b/api/tariff.go
index c433506ba..d8b1b37a0 100644
--- a/api/tariff.go
+++ b/api/tariff.go
@@ -8,5 +8,6 @@ const (
 	_ TariffType = iota
 	TariffTypePriceStatic
 	TariffTypePriceDynamic
+	TariffTypePriceForecast
 	TariffTypeCo2
 )
diff --git a/api/tarifftype_enumer.go b/api/tarifftype_enumer.go
index ac0a6e744..9a7b11cf7 100644
--- a/api/tarifftype_enumer.go
+++ b/api/tarifftype_enumer.go
@@ -7,11 +7,11 @@ import (
 	"strings"
 )
 
-const _TariffTypeName = "pricestaticpricedynamicco2"
+const _TariffTypeName = "pricestaticpricedynamicpriceforecastco2"
 
-var _TariffTypeIndex = [...]uint8{0, 11, 23, 26}
+var _TariffTypeIndex = [...]uint8{0, 11, 23, 36, 39}
 
-const _TariffTypeLowerName = "pricestaticpricedynamicco2"
+const _TariffTypeLowerName = "pricestaticpricedynamicpriceforecastco2"
 
 func (i TariffType) String() string {
 	i -= 1
@@ -27,24 +27,28 @@ func _TariffTypeNoOp() {
 	var x [1]struct{}
 	_ = x[TariffTypePriceStatic-(1)]
 	_ = x[TariffTypePriceDynamic-(2)]
-	_ = x[TariffTypeCo2-(3)]
+	_ = x[TariffTypePriceForecast-(3)]
+	_ = x[TariffTypeCo2-(4)]
 }
 
-var _TariffTypeValues = []TariffType{TariffTypePriceStatic, TariffTypePriceDynamic, TariffTypeCo2}
+var _TariffTypeValues = []TariffType{TariffTypePriceStatic, TariffTypePriceDynamic, TariffTypePriceForecast, TariffTypeCo2}
 
 var _TariffTypeNameToValueMap = map[string]TariffType{
 	_TariffTypeName[0:11]:       TariffTypePriceStatic,
 	_TariffTypeLowerName[0:11]:  TariffTypePriceStatic,
 	_TariffTypeName[11:23]:      TariffTypePriceDynamic,
 	_TariffTypeLowerName[11:23]: TariffTypePriceDynamic,
-	_TariffTypeName[23:26]:      TariffTypeCo2,
-	_TariffTypeLowerName[23:26]: TariffTypeCo2,
+	_TariffTypeName[23:36]:      TariffTypePriceForecast,
+	_TariffTypeLowerName[23:36]: TariffTypePriceForecast,
+	_TariffTypeName[36:39]:      TariffTypeCo2,
+	_TariffTypeLowerName[36:39]: TariffTypeCo2,
 }
 
 var _TariffTypeNames = []string{
 	_TariffTypeName[0:11],
 	_TariffTypeName[11:23],
-	_TariffTypeName[23:26],
+	_TariffTypeName[23:36],
+	_TariffTypeName[36:39],
 }
 
 // TariffTypeString retrieves an enum value from the enum constants string name.
diff --git a/assets/js/components/Energyflow/Energyflow.vue b/assets/js/components/Energyflow/Energyflow.vue
index 30ac225cb..b7b0ffdb7 100644
--- a/assets/js/components/Energyflow/Energyflow.vue
+++ b/assets/js/components/Energyflow/Energyflow.vue
@@ -171,7 +171,7 @@ import GridSettingsModal from "../GridSettingsModal.vue";
 import formatter from "../../mixins/formatter";
 import AnimatedNumber from "../AnimatedNumber.vue";
 import settings from "../../settings";
-import { CO2_TYPE, PRICE_DYNAMIC_TYPE } from "../../units";
+import { CO2_TYPE, PRICE_DYNAMIC_TYPE, PRICE_FORECAST_TYPE } from "../../units";
 import collector from "../../mixins/collector";
 import BatterySettingsModal from "../BatterySettingsModal.vue";
 
@@ -216,7 +216,7 @@ export default {
 	},
 	computed: {
 		smartCostAvailable: function () {
-			return [CO2_TYPE, PRICE_DYNAMIC_TYPE].includes(this.smartCostType);
+			return [CO2_TYPE, PRICE_DYNAMIC_TYPE, PRICE_FORECAST_TYPE].includes(this.smartCostType);
 		},
 		gridImport: function () {
 			return Math.max(0, this.gridPower);
diff --git a/assets/js/components/GridSettingsModal.vue b/assets/js/components/GridSettingsModal.vue
index 0b6bb3397..77e0f185a 100644
--- a/assets/js/components/GridSettingsModal.vue
+++ b/assets/js/components/GridSettingsModal.vue
@@ -114,6 +114,7 @@ export default {
 	props: {
 		smartCostLimit: Number,
 		smartCostType: String,
+		tariffGrid: Number,
 		currency: String,
 	},
 	data: function () {
@@ -241,6 +242,11 @@ export default {
 				this.updateTariff();
 			}
 		},
+		tariffGrid() {
+			if (this.isModalVisible) {
+				this.updateTariff();
+			}
+		},
 		smartCostLimit(limit) {
 			this.selectedSmartCostLimit = limit;
 		},
diff --git a/assets/js/units.js b/assets/js/units.js
index 58ab3b8be..ca11d5605 100644
--- a/assets/js/units.js
+++ b/assets/js/units.js
@@ -6,6 +6,7 @@ export const UNITS = [KM, MILES];
 
 export const CO2_TYPE = "co2";
 export const PRICE_DYNAMIC_TYPE = "pricedynamic";
+export const PRICE_FORECAST_TYPE = "priceforecast";
 
 const MILES_FACTOR = 0.6213711922;
 
diff --git a/core/site_api.go b/core/site_api.go
index f7d4ba7e6..6be6cdeb9 100644
--- a/core/site_api.go
+++ b/core/site_api.go
@@ -147,7 +147,7 @@ func (site *Site) GetTariff(tariff string) api.Tariff {
 			// prio 0: manually set planner tariff
 			return site.tariffs.Planner
 
-		case site.tariffs.Grid != nil && site.tariffs.Grid.Type() == api.TariffTypePriceDynamic:
+		case site.tariffs.Grid != nil && site.tariffs.Grid.Type() == api.TariffTypePriceForecast:
 			// prio 1: dynamic grid tariff
 			return site.tariffs.Grid
 
diff --git a/evcc.dist.yaml b/evcc.dist.yaml
index 990598d27..79b797528 100644
--- a/evcc.dist.yaml
+++ b/evcc.dist.yaml
@@ -194,6 +194,13 @@ tariffs:
     # securitytoken: # api token
     # charges: # optional, additional charges per kWh
     # tax: # optional, additional tax (0.1 for 10%)
+
+    # type: custom # price from a plugin source; see https://docs.evcc.io/docs/reference/plugins
+    # price:
+    #   source: http
+    #   uri: https://example.org/price.json
+    #   jq: .price.current
+
   feedin:
     # rate for feeding excess (pv) energy to the grid
     type: fixed
diff --git a/tariff/awattar.go b/tariff/awattar.go
index 3949575ed..5b94f43c6 100644
--- a/tariff/awattar.go
+++ b/tariff/awattar.go
@@ -99,5 +99,5 @@ func (t *Awattar) Rates() (api.Rates, error) {
 
 // Type implements the api.Tariff interface
 func (t *Awattar) Type() api.TariffType {
-	return api.TariffTypePriceDynamic
+	return api.TariffTypePriceForecast
 }
diff --git a/tariff/elering.go b/tariff/elering.go
index 99105168a..3dd1a766f 100644
--- a/tariff/elering.go
+++ b/tariff/elering.go
@@ -112,5 +112,5 @@ func (t *Elering) Rates() (api.Rates, error) {
 
 // Type implements the api.Tariff interface
 func (t *Elering) Type() api.TariffType {
-	return api.TariffTypePriceDynamic
+	return api.TariffTypePriceForecast
 }
diff --git a/tariff/energinet.go b/tariff/energinet.go
index d3ddaaf3c..c5ec71c11 100644
--- a/tariff/energinet.go
+++ b/tariff/energinet.go
@@ -109,5 +109,5 @@ func (t *Energinet) Rates() (api.Rates, error) {
 
 // Type implements the api.Tariff interface
 func (t *Energinet) Type() api.TariffType {
-	return api.TariffTypePriceDynamic
+	return api.TariffTypePriceForecast
 }
diff --git a/tariff/fixed.go b/tariff/fixed.go
index 11f6a36aa..0c1a41b46 100644
--- a/tariff/fixed.go
+++ b/tariff/fixed.go
@@ -133,7 +133,7 @@ func (t *Fixed) Rates() (api.Rates, error) {
 // Type implements the api.Tariff interface
 func (t *Fixed) Type() api.TariffType {
 	if t.dynamic {
-		return api.TariffTypePriceDynamic
+		return api.TariffTypePriceForecast
 	}
 	return api.TariffTypePriceStatic
 }
diff --git a/tariff/octopus.go b/tariff/octopus.go
index 14867ef10..33ff2278a 100644
--- a/tariff/octopus.go
+++ b/tariff/octopus.go
@@ -110,5 +110,5 @@ func (t *Octopus) Rates() (api.Rates, error) {
 
 // Type implements the api.Tariff interface
 func (t *Octopus) Type() api.TariffType {
-	return api.TariffTypePriceDynamic
+	return api.TariffTypePriceForecast
 }
diff --git a/tariff/tariff.go b/tariff/tariff.go
new file mode 100644
index 000000000..ba759c4db
--- /dev/null
+++ b/tariff/tariff.go
@@ -0,0 +1,68 @@
+package tariff
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/evcc-io/evcc/api"
+	"github.com/evcc-io/evcc/provider"
+	"github.com/evcc-io/evcc/util"
+	"github.com/jinzhu/now"
+)
+
+type Tariff struct {
+	*embed
+	priceG func() (float64, error)
+}
+
+var _ api.Tariff = (*Tariff)(nil)
+
+func init() {
+	registry.Add(api.Custom, NewConfigurableFromConfig)
+}
+
+func NewConfigurableFromConfig(other map[string]interface{}) (api.Tariff, error) {
+	var cc struct {
+		embed `mapstructure:",squash"`
+		Price provider.Config
+	}
+
+	if err := util.DecodeOther(other, &cc); err != nil {
+		return nil, err
+	}
+
+	priceG, err := provider.NewFloatGetterFromConfig(cc.Price)
+	if err != nil {
+		return nil, fmt.Errorf("price: %w", err)
+	}
+
+	t := &Tariff{
+		embed:  &cc.embed,
+		priceG: priceG,
+	}
+
+	return t, nil
+}
+
+// Rates implements the api.Tariff interface
+func (t *Tariff) Rates() (api.Rates, error) {
+	price, err := t.priceG()
+	if err != nil {
+		return nil, err
+	}
+
+	res := api.Rates{
+		{
+			Start: now.BeginningOfHour(),
+			End:   now.BeginningOfHour().Add(48 * time.Hour),
+			Price: t.totalPrice(price),
+		},
+	}
+
+	return res, nil
+}
+
+// Type implements the api.Tariff interface
+func (t *Tariff) Type() api.TariffType {
+	return api.TariffTypePriceDynamic
+}
diff --git a/tariff/tibber.go b/tariff/tibber.go
index e54c4f3a7..b1978b0e8 100644
--- a/tariff/tibber.go
+++ b/tariff/tibber.go
@@ -140,5 +140,5 @@ func (t *Tibber) Rates() (api.Rates, error) {
 
 // Type implements the api.Tariff interface
 func (t *Tibber) Type() api.TariffType {
-	return api.TariffTypePriceDynamic
+	return api.TariffTypePriceForecast
 }