diff --git a/powerwall.sh b/powerwall.sh
index 3317a09d..7e4cf21e 100755
--- a/powerwall.sh
+++ b/powerwall.sh
@@ -116,7 +116,7 @@ CHECKACV_SERVICE(){
 	do
 		INPUTACV=$(curl -s "http://10.10.0.61/stats.json" | jq '.inputs .inV')
 		datetime=`date +'%Y-%m-%d %H:%M:%S'`
-		if [ ${INPUTACV%.*} -ge 124 ]; then
+		if [ ${INPUTACV%.*} -ge ${min_volt} ]; then
 			echo "($datetime) normal voltage: ${INPUTACV}V"
 		else
 			echo "($datetime) LOW voltage: ${INPUTACV}V"