diff --git a/xhpc-modules/xhpc-power-pile/src/main/java/com/xhpc/pp/logic/RealtimeDataLogic.java b/xhpc-modules/xhpc-power-pile/src/main/java/com/xhpc/pp/logic/RealtimeDataLogic.java
index 4b4ac3a5..6acd6880 100644
--- a/xhpc-modules/xhpc-power-pile/src/main/java/com/xhpc/pp/logic/RealtimeDataLogic.java
+++ b/xhpc-modules/xhpc-power-pile/src/main/java/com/xhpc/pp/logic/RealtimeDataLogic.java
@@ -154,7 +154,7 @@ public class RealtimeDataLogic implements ServiceLogic {
                 } else {
                     Integer vul = (Integer) cachePile.get("voltageUpperLimits");
                     Integer cul = (Integer) cachePile.get("currentLimit");
-                    if (wc > cul || wv > vul) {
+                    if(vul != null  && cul != null && (wc > cul || wv > vul)) {
                         R r = chargingController.stopCharging(pileNo, gunId, default_version);
                         if (r.getCode() == 200) {
                             Integer vcpcnt = (Integer) cacheOrder.get("vcpcnt");