diff --git a/assets/js/components/Energyflow/Energyflow.vue b/assets/js/components/Energyflow/Energyflow.vue
index 1ff226a40..85ef500dc 100644
--- a/assets/js/components/Energyflow/Energyflow.vue
+++ b/assets/js/components/Energyflow/Energyflow.vue
@@ -140,14 +140,16 @@
 							</template>
 						</EnergyflowEntry>
 						<EnergyflowEntry
+							:key="`grid-${showCo2}`"
 							:name="$t('main.energyflow.gridImport')"
 							icon="powersupply"
 							:power="gridImport"
 							:powerUnit="powerUnit"
 							:details="detailsValue(tariffGrid, tariffCo2)"
 							:detailsFmt="detailsFmt"
-							:detailsTooltip="detailsTooltip(tariffGrid, tariffCo2)"
+							:detailsClickable="hasPriceAndCo2"
 							data-testid="energyflow-entry-gridimport"
+							@details-clicked="toggleCo2"
 						/>
 					</div>
 				</div>
@@ -163,15 +165,17 @@
 					<div>
 						<EnergyflowEntry
 							v-if="pvPossible"
+							:key="`home-${showCo2}`"
 							:name="$t('main.energyflow.homePower')"
 							icon="home"
 							:power="homePower"
 							:powerUnit="powerUnit"
 							:details="detailsValue(tariffPriceHome, tariffCo2Home)"
 							:detailsFmt="detailsFmt"
-							:detailsTooltip="detailsTooltip(tariffPriceHome, tariffCo2Home)"
+							:detailsClickable="hasPriceAndCo2"
 							data-testid="energyflow-entry-home"
 							:expanded="consumersExpanded"
+							@details-clicked="toggleCo2"
 							@toggle="toggleConsumers"
 						>
 							<template v-if="consumers.length > 0" #expanded>
@@ -188,6 +192,7 @@
 							</template>
 						</EnergyflowEntry>
 						<EnergyflowEntry
+							:key="`loadpoints-${showCo2}`"
 							:name="loadpointsLabel"
 							icon="vehicle"
 							:iconProps="{ names: vehicleIcons }"
@@ -199,11 +204,10 @@
 									: undefined
 							"
 							:detailsFmt="detailsFmt"
-							:detailsTooltip="
-								detailsTooltip(tariffPriceLoadpoints, tariffCo2Loadpoints)
-							"
+							:detailsClickable="hasPriceAndCo2"
 							data-testid="energyflow-entry-loadpoints"
 							:expanded="loadpointsExpanded"
+							@details-clicked="toggleCo2"
 							@toggle="toggleLoadpoints"
 						>
 							<template v-if="activeLoadpointsCount > 0" #expanded>
@@ -277,14 +281,16 @@
 						</EnergyflowEntry>
 						<EnergyflowEntry
 							v-if="pvPossible"
+							:key="`export-${showCo2}`"
 							:name="$t('main.energyflow.pvExport')"
 							icon="powersupply"
 							:power="pvExport"
 							:powerUnit="powerUnit"
 							:details="detailsValue(-tariffFeedIn)"
 							:detailsFmt="detailsFmt"
-							:detailsTooltip="detailsTooltip(-tariffFeedIn)"
+							:detailsClickable="hasPriceAndCo2"
 							data-testid="energyflow-entry-gridexport"
+							@details-clicked="toggleCo2"
 						/>
 					</div>
 				</div>
@@ -356,6 +362,21 @@ export default defineComponent({
 		return { detailsOpen: false, detailsCompleteHeight: null as number | null, ready: false };
 	},
 	computed: {
+		showCo2() {
+			if (this.hasCo2 && !this.hasPrice) {
+				return true;
+			}
+			return settings.energyflowCo2;
+		},
+		hasPrice() {
+			return this.tariffGrid !== undefined;
+		},
+		hasCo2() {
+			return this.tariffCo2 !== undefined;
+		},
+		hasPriceAndCo2() {
+			return this.hasPrice && this.hasCo2;
+		},
 		gridImport() {
 			return Math.max(0, this.gridPower);
 		},
@@ -434,14 +455,14 @@ export default defineComponent({
 		fmtLoadpointTemp() {
 			return (temp: number) => this.fmtTemperature(temp);
 		},
-		co2Available() {
+		smartCostCo2() {
 			return this.smartCostType === SMART_COST_TYPE.CO2;
 		},
 		pvPossible() {
 			return this.pvConfigured || this.gridConfigured;
 		},
 		batteryGridChargeNow() {
-			if (this.co2Available) {
+			if (this.smartCostCo2) {
 				return this.fmtCo2Short(this.tariffCo2);
 			}
 			return this.fmtPricePerKWh(this.tariffGrid, this.currency, true);
@@ -455,7 +476,7 @@ export default defineComponent({
 			if (!this.batteryGridChargeLimitSet) {
 				return;
 			}
-			if (this.co2Available) {
+			if (this.smartCostCo2) {
 				return this.fmtCo2Short(this.batteryGridChargeLimit);
 			}
 			return this.fmtPricePerKWh(this.batteryGridChargeLimit, this.currency, true);
@@ -532,27 +553,16 @@ export default defineComponent({
 		window.removeEventListener("resize", this.updateHeight);
 	},
 	methods: {
-		detailsTooltip(price?: number, co2?: number) {
-			const result = [];
-			if (co2 !== undefined) {
-				result.push(`${this.fmtCo2Long(co2)}`);
-			}
-			if (price !== undefined) {
-				result.push(`${this.fmtPricePerKWh(price, this.currency)}`);
-			}
-			return result;
-		},
 		detailsValue(price?: number, co2?: number) {
-			if (this.co2Available) {
-				return co2;
-			}
-			return price;
+			return this.showCo2 ? co2 : price;
 		},
 		detailsFmt(value: number) {
-			if (this.co2Available) {
-				return this.fmtCo2Short(value);
-			}
-			return this.fmtPricePerKWh(value, this.currency, true);
+			return this.showCo2
+				? this.fmtCo2Short(value)
+				: this.fmtPricePerKWh(value, this.currency, true);
+		},
+		toggleCo2() {
+			settings.energyflowCo2 = !settings.energyflowCo2;
 		},
 		forecastFmt(value: number) {
 			if (typeof value !== "number") return "";
diff --git a/assets/js/components/Energyflow/Entry.vue b/assets/js/components/Energyflow/Entry.vue
index 609067186..59b791439 100644
--- a/assets/js/components/Energyflow/Entry.vue
+++ b/assets/js/components/Energyflow/Entry.vue
@@ -30,7 +30,7 @@
 				<span class="text-end text-nowrap ps-1 fw-bold d-flex align-items-center">
 					<div
 						ref="details"
-						class="fw-normal d-flex align-items-center"
+						class="fw-normal d-flex align-items-center user-select-none"
 						:class="{
 							'text-decoration-underline': detailsClickable,
 							'evcc-gray': detailsInactive,
diff --git a/assets/js/settings.ts b/assets/js/settings.ts
index 93eb77c84..db31a3527 100644
--- a/assets/js/settings.ts
+++ b/assets/js/settings.ts
@@ -8,6 +8,7 @@ const SETTINGS_UNIT = "settings_unit";
 const SETTINGS_12H_FORMAT = "settings_12h_format";
 const SETTINGS_HIDDEN_FEATURES = "settings_hidden_features";
 const SETTINGS_ENERGYFLOW_DETAILS = "settings_energyflow_details";
+const SETTINGS_ENERGYFLOW_CO2 = "settings_energyflow_co2";
 const SETTINGS_ENERGYFLOW_PV = "settings_energyflow_pv";
 const SETTINGS_ENERGYFLOW_BATTERY = "settings_energyflow_battery";
 const SETTINGS_ENERGYFLOW_LOADPOINTS = "settings_energyflow_loadpoints";
@@ -105,6 +106,7 @@ export interface Settings {
   is12hFormat: boolean;
   hiddenFeatures: boolean;
   energyflowDetails: boolean;
+  energyflowCo2: boolean;
   energyflowPv: boolean;
   energyflowBattery: boolean;
   energyflowLoadpoints: boolean;
@@ -126,6 +128,7 @@ const settings: Settings = reactive({
   is12hFormat: readBool(SETTINGS_12H_FORMAT),
   hiddenFeatures: readBool(SETTINGS_HIDDEN_FEATURES),
   energyflowDetails: readBool(SETTINGS_ENERGYFLOW_DETAILS),
+  energyflowCo2: readBool(SETTINGS_ENERGYFLOW_CO2),
   energyflowPv: readBool(SETTINGS_ENERGYFLOW_PV),
   energyflowBattery: readBool(SETTINGS_ENERGYFLOW_BATTERY),
   energyflowLoadpoints: readBool(SETTINGS_ENERGYFLOW_LOADPOINTS),
@@ -146,6 +149,7 @@ watch(() => settings.unit, save(SETTINGS_UNIT));
 watch(() => settings.is12hFormat, saveBool(SETTINGS_12H_FORMAT));
 watch(() => settings.hiddenFeatures, saveBool(SETTINGS_HIDDEN_FEATURES));
 watch(() => settings.energyflowDetails, saveBool(SETTINGS_ENERGYFLOW_DETAILS));
+watch(() => settings.energyflowCo2, saveBool(SETTINGS_ENERGYFLOW_CO2));
 watch(() => settings.energyflowPv, saveBool(SETTINGS_ENERGYFLOW_PV));
 watch(() => settings.energyflowBattery, saveBool(SETTINGS_ENERGYFLOW_BATTERY));
 watch(() => settings.energyflowLoadpoints, saveBool(SETTINGS_ENERGYFLOW_LOADPOINTS));
diff --git a/tests/energyflow.spec.ts b/tests/energyflow.spec.ts
new file mode 100644
index 000000000..9ba6bf98f
--- /dev/null
+++ b/tests/energyflow.spec.ts
@@ -0,0 +1,42 @@
+import { test, expect } from "@playwright/test";
+import { start, stop, baseUrl } from "./evcc";
+
+const CONFIG = "config-with-tariffs.evcc.yaml";
+
+test.use({ baseURL: baseUrl() });
+
+test.beforeAll(async () => {
+  await start(CONFIG);
+});
+
+test.afterAll(async () => {
+  await stop();
+});
+
+test.beforeEach(async ({ page }) => {
+  await page.goto("/");
+});
+
+test("tariff toggle", async ({ page }) => {
+  const energyflow = page.getByTestId("energyflow");
+  await energyflow.click();
+
+  const details = page
+    .getByTestId("energyflow-entry-gridimport")
+    .getByTestId("energyflow-entry-details");
+
+  // check price
+  await expect(details).toHaveText("30.0 öre");
+
+  // toggle to co2
+  await details.click();
+  await expect(details).toHaveText("300 g");
+
+  // reload page and verify persistence
+  await page.reload();
+  await expect(details).toHaveText("300 g");
+
+  // toggle back to price
+  await details.click();
+  await expect(details).toHaveText("30.0 öre");
+});