diff --git a/sonoff/_changelog.ino b/sonoff/_changelog.ino
index 93cf1687f..0a0f6c90f 100644
--- a/sonoff/_changelog.ino
+++ b/sonoff/_changelog.ino
@@ -1,6 +1,7 @@
 /* 6.5.0.14 20190602
  * Change webserver HTML input, button, textarea, and select name based on id
  * Fix webserver multiple Javascript window.onload functionality
+ * Fix PZem startup issue (#5875)
  *
  * 6.5.0.13 20190527
  * Add command SetOption38 6..255 to set IRReceive protocol detection sensitivity mimizing UNKNOWN protocols (#5853)
diff --git a/sonoff/xnrg_05_pzem_ac.ino b/sonoff/xnrg_05_pzem_ac.ino
index 653b4ef63..afabca17c 100644
--- a/sonoff/xnrg_05_pzem_ac.ino
+++ b/sonoff/xnrg_05_pzem_ac.ino
@@ -36,6 +36,24 @@
 #include <TasmotaModbus.h>
 TasmotaModbus *PzemAcModbus;
 
+/*
+uint16_t PzemCalculateCRC(uint8_t *buffer, uint8_t num)
+{
+  uint16_t crc = 0xFFFF;
+  for (uint8_t i = 0; i < num; i++) {
+    crc ^= buffer[i];
+    for (uint8_t j = 8; j; j--) {
+      if ((crc & 0x0001) != 0) {        // If the LSB is set
+        crc >>= 1;                      // Shift right and XOR 0xA001
+        crc ^= 0xA001;
+      } else {                          // Else LSB is not set
+        crc >>= 1;                      // Just shift right
+      }
+    }
+  }
+  return crc;
+}
+*/
 void PzemAcEverySecond(void)
 {
   static uint8_t send_retry = 0;
@@ -51,24 +69,26 @@ void PzemAcEverySecond(void)
     if (error) {
       AddLog_P2(LOG_LEVEL_DEBUG, PSTR(D_LOG_DEBUG "PzemAc response error %d"), error);
     } else {
-      energy_data_valid = 0;
+//      if ((PzemCalculateCRC(buffer, 23)) == ((buffer[24] << 8) | buffer[23])) {
+        energy_data_valid = 0;
 
-      //  0  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
-      // 01 04 14 08 D1 00 6C 00 00 00 F4 00 00 00 26 00 00 01 F4 00 64 00 00 51 34
-      // Id Cc Sz Volt- Current---- Power------ Energy----- Frequ PFact Alarm Crc--
-      energy_voltage = (float)((buffer[3] << 8) + buffer[4]) / 10.0;                                                  // 6553.0 V
-      energy_current = (float)((buffer[7] << 24) + (buffer[8] << 16) + (buffer[5] << 8) + buffer[6]) / 1000.0;        // 4294967.000 A
-      energy_active_power = (float)((buffer[11] << 24) + (buffer[12] << 16) + (buffer[9] << 8) + buffer[10]) / 10.0;  // 429496729.0 W
-      energy_frequency = (float)((buffer[17] << 8) + buffer[18]) / 10.0;                                              // 50.0 Hz
-      energy_power_factor = (float)((buffer[19] << 8) + buffer[20]) / 100.0;                                          // 1.00
-      float energy = (float)((buffer[15] << 24) + (buffer[16] << 16) + (buffer[13] << 8) + buffer[14]);               // 4294967295 Wh
+        //  0  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
+        // 01 04 14 08 D1 00 6C 00 00 00 F4 00 00 00 26 00 00 01 F4 00 64 00 00 51 34
+        // Id Cc Sz Volt- Current---- Power------ Energy----- Frequ PFact Alarm Crc--
+        energy_voltage = (float)((buffer[3] << 8) + buffer[4]) / 10.0;                                                  // 6553.0 V
+        energy_current = (float)((buffer[7] << 24) + (buffer[8] << 16) + (buffer[5] << 8) + buffer[6]) / 1000.0;        // 4294967.000 A
+        energy_active_power = (float)((buffer[11] << 24) + (buffer[12] << 16) + (buffer[9] << 8) + buffer[10]) / 10.0;  // 429496729.0 W
+        energy_frequency = (float)((buffer[17] << 8) + buffer[18]) / 10.0;                                              // 50.0 Hz
+        energy_power_factor = (float)((buffer[19] << 8) + buffer[20]) / 100.0;                                          // 1.00
+        float energy = (float)((buffer[15] << 24) + (buffer[16] << 16) + (buffer[13] << 8) + buffer[14]);               // 4294967295 Wh
 
-      if (!energy_start || (energy < energy_start)) { energy_start = energy; }  // Init after restart and handle roll-over if any
-      if (energy != energy_start) {
-        energy_kWhtoday += (unsigned long)((energy - energy_start) * 100);
-        energy_start = energy;
-      }
-      EnergyUpdateToday();
+        if (!energy_start || (energy < energy_start)) { energy_start = energy; }  // Init after restart and handle roll-over if any
+        if (energy != energy_start) {
+          energy_kWhtoday += (unsigned long)((energy - energy_start) * 100);
+          energy_start = energy;
+        }
+        EnergyUpdateToday();
+//      }
     }
   }
 
@@ -118,7 +138,7 @@ int Xnrg05(uint8_t function)
         PzemAcSnsInit();
         break;
       case FUNC_ENERGY_EVERY_SECOND:
-        PzemAcEverySecond();
+        if (uptime > 4) { PzemAcEverySecond(); }  // Fix start up issue #5875
         break;
     }
   }
diff --git a/sonoff/xnrg_06_pzem_dc.ino b/sonoff/xnrg_06_pzem_dc.ino
index f9817577a..ab70b4e62 100644
--- a/sonoff/xnrg_06_pzem_dc.ino
+++ b/sonoff/xnrg_06_pzem_dc.ino
@@ -117,7 +117,7 @@ int Xnrg06(uint8_t function)
         PzemDcSnsInit();
         break;
       case FUNC_ENERGY_EVERY_SECOND:
-        PzemDcEverySecond();
+        if (uptime > 4) { PzemDcEverySecond(); }  // Fix start up issue #5875
         break;
     }
   }