diff --git a/src/scheduler.cpp b/src/scheduler.cpp
index ff309f51..c73f9043 100644
--- a/src/scheduler.cpp
+++ b/src/scheduler.cpp
@@ -226,7 +226,12 @@ unsigned long Scheduler::loop(MicroTasks::WakeReason reason)
       if(EvseState::Active == currentEvent.getState())
       {
         priority = EvseManager_Priority_Timer;
-        properties.setChargeCurrent(_evse->getMaxHardwareCurrent());
+        uint8_t evseMaxCurrent = _evse->getMaxHardwareCurrent();
+        if (!evseMaxCurrent) {
+          // evse not ready, retry in 1 sec
+          return 1000;
+        }
+        properties.setChargeCurrent(evseMaxCurrent);
       }
       _evse->claim(EvseClient_OpenEVSE_Schedule, priority, properties);
     } else {