diff --git a/tasmota/tasmota_xdrv_driver/xdrv_03_energy.ino b/tasmota/tasmota_xdrv_driver/xdrv_03_energy.ino
index a669363c3..aae18311e 100644
--- a/tasmota/tasmota_xdrv_driver/xdrv_03_energy.ino
+++ b/tasmota/tasmota_xdrv_driver/xdrv_03_energy.ino
@@ -924,7 +924,6 @@ uint32_t EnergyGetCalibration(uint32_t cal_type, uint32_t chan = 0) {
       case ENERGY_POWER_CALIBRATION: return Settings->energy_power_calibration;
       case ENERGY_VOLTAGE_CALIBRATION: return Settings->energy_voltage_calibration;
       case ENERGY_CURRENT_CALIBRATION: return Settings->energy_current_calibration;
-
     }
   }
   return Settings->energy_frequency_calibration;
@@ -1301,6 +1300,7 @@ void EnergyShow(bool json) {
         else if (0 == Energy->current[i]) {
           reactive_power[i] = 0;
         }
+
       }
     }
   }
diff --git a/tasmota/tasmota_xnrg_energy/xnrg_25_v9240.ino b/tasmota/tasmota_xnrg_energy/xnrg_25_v9240.ino
index e9a15f121..56c60cfac 100644
--- a/tasmota/tasmota_xnrg_energy/xnrg_25_v9240.ino
+++ b/tasmota/tasmota_xnrg_energy/xnrg_25_v9240.ino
@@ -379,13 +379,23 @@ float V9240::value(const V9240::parameter p) const
 
 void V9240::set_checksum()
 {
-    CKSUM = UINT32_MAX - std::accumulate(rw_mem,rw_mem+rw_len-1 ,0);
+//    CKSUM = UINT32_MAX - std::accumulate(rw_mem,rw_mem+rw_len-1 ,0);
+    int init = 0;
+    for (uint32_t i = 0; i < rw_len-1; i++) {
+      init += rw_mem[i];
+    }
+    CKSUM = UINT32_MAX - init;
     write(Address::CKSUM,CKSUM);
 }
 
 char V9240::calc_check(char *buff, size_t len)
 {
-    return ~std::accumulate(buff,buff+len,0)+0x33;
+//    return ~std::accumulate(buff,buff+len,0)+0x33;
+    char init = 0;
+    for (uint32_t i = 0; i < len; i++) {
+      init += buff[i];
+    }
+    return ~init + 0x33;
 }