diff --git a/offsite-power-check.sh b/offsite-power-check.sh
index f00c9512..fab91273 100755
--- a/offsite-power-check.sh
+++ b/offsite-power-check.sh
@@ -33,7 +33,7 @@ $(date)"
 while true; do
 	upsinfo=$(upsc CP1500PFCLCD)
 	echo "HERE: ${upsinfo}"
-	if [ "${upsinfo}" != "Error: Connection failure: Connection refused" ]; then
+	if [ "${upsinfo}" != "" ] && [ "${upsinfo}" != "Error: Connection failure: Connection refused" ]; then
 		OFFSITE_VOLTIN=$(echo "${upsinfo}" | grep 'input.voltage:' | sed 's/.*: //')
 		OFFSITE_BATT_RUNTIME=$(echo "${upsinfo}" | grep 'battery.runtime:' | sed 's/.*: //')
 		OFFSITE_BATT_RUNTIME=`echo "scale=2; ${OFFSITE_BATT_RUNTIME}/60" | bc`