diff --git a/assets/js/components/Battery/BatterySettingsModal.vue b/assets/js/components/Battery/BatterySettingsModal.vue
index 8b000d597..9525a1cad 100644
--- a/assets/js/components/Battery/BatterySettingsModal.vue
+++ b/assets/js/components/Battery/BatterySettingsModal.vue
@@ -247,7 +247,7 @@
 			:current-limit="batteryGridChargeLimit"
 			:smart-cost-type="smartCostType"
 			:currency="currency"
-			:tariff="forecast?.grid"
+			:tariff="gridChargeTariff"
 			:possible="gridChargePossible"
 		/>
 	</GenericModal>
@@ -315,6 +315,12 @@ export default defineComponent({
 		gridChargePossible() {
 			return this.controllable && this.isModalVisible && this.smartCostAvailable;
 		},
+		gridChargeTariff() {
+			if (this.smartCostType === SMART_COST_TYPE.CO2) {
+				return this.forecast?.co2;
+			}
+			return this.forecast?.grid;
+		},
 		bufferOptions() {
 			const options = [];
 			for (let i = 100; i >= 5; i -= 5) {