diff --git a/powerwall.sh b/powerwall.sh
index ca842b92..36d72f59 100755
--- a/powerwall.sh
+++ b/powerwall.sh
@@ -794,7 +794,7 @@ CHECKPOWER(){
 								PS2=$(snmpwalk -t 1 -r 0 -v 1 -c public ${PW_HOST_IDRACS[${SENSOR}]} iso.3.6.1.4.1.674.10892.5.4.600.30.1.6.1.${s} | sed 's/.*: //')
 							fi
 						done
-						if [ ${found} -eq 1 ] && [ "${HOST_WATTS}" != "0" ]; then
+						if [ ${found} -eq 1 ] && [ "${HOST_WATTS}" != "0" ] && [ "${HOST_WATTS}" != "" ]; then
 							[ "${PS1}" != "0.0" ] && PS1=`echo "scale=1; ${PS1}/10" | bc` && (( $(bc <<<"${PS1} < 1") )) && [[ "${PS1}" = *"."* ]] && PS1="0${PS1}"
 							[ "${PS2}" != "0.0" ] && PS2=`echo "scale=1; ${PS2}/10" | bc` && (( $(bc <<<"${PS2} < 1") )) && [[ "${PS2}" = *"."* ]] && PS2="0${PS2}"
 							HOST_AMPS=`echo "scale=1; ${PS1}+${PS2}" | bc`