diff --git a/esp32/include/ControllerConfiguration.h b/esp32/include/ControllerConfiguration.h
index 6bbe72a..4768d39 100644
--- a/esp32/include/ControllerConfiguration.h
+++ b/esp32/include/ControllerConfiguration.h
@@ -127,7 +127,7 @@
 
 #define FIRMWARE_BASENAME "PlantControl"
 #define FIRMWARE_NAME FIRMWARE_BASENAME FIRMWARE_FEATURE1 FIRMWARE_FEATURE2
-#define FIRMWARE_VERSIONNMUMBER "3.010"
+#define FIRMWARE_VERSIONNMUMBER "3.011"
 
 #ifdef HWREVISION07
     #define FIRMWARE_VERSION FIRMWARE_VERSIONNMUMBER " HW0.7"
@@ -158,8 +158,8 @@
 #define SOLAR_CHARGE_MAX_VOLTAGE    9   /**< Sun is shining (noon)  */
 #define SOLAR_MAX_VOLTAGE_POSSIBLE  100 /**< higher values are treated as not connected sensor  */
 #define VOLT_MAX_BATT               4.2f
-#define VOLT_MIN_BATT               3.0f    /**< Minimum battery voltage for normal operation */
-#define LOWVOLT_SLEEP_FACTOR        3       /**< Factor for nightsleep delay, if the battery drops below minimum (@see VOLT_MIN_BATT) */
+#define VOLT_MIN_BATT               3.2f    /**< Minimum battery voltage for normal operation */
+#define LOWVOLT_SLEEP_FACTOR        6       /**< Factor for nightsleep delay, if the battery drops below minimum (@see VOLT_MIN_BATT) */
 #define LOWVOLT_SLEEP_MINIMUM       7200    /**< At low voltage sleep at least for 120 minutes (two hours) */
 
 #define WATER_LEVEL_MINIMUM         500      /**< Minimum Analog value (1023 is the maximum)*/
diff --git a/esp32/src/main.cpp b/esp32/src/main.cpp
index e5124bd..c68d3a9 100644
--- a/esp32/src/main.cpp
+++ b/esp32/src/main.cpp
@@ -1095,7 +1095,16 @@ void plantcontrol()
         sensorWater.setProperty("raw").send(String(waterRawSensor.getAverage()));
       }
     }
-    sensorLipo.setProperty("percent").send(String(100 * mBatteryVoltage / VOLT_MAX_BATT));
+    
+    if (mBatteryVoltage < VOLT_MIN_BATT)
+    {
+      sensorLipo.setProperty("percent").send("0");
+    }
+    else
+    {
+      sensorLipo.setProperty("percent").send(String(100 * (((mBatteryVoltage - VOLT_MIN_BATT) / (VOLT_MAX_BATT - VOLT_MIN_BATT)))));
+    }
+
     sensorLipo.setProperty("volt").send(String(mBatteryVoltage));
     sensorLipo.setProperty("current").send(String(battery.getCurrent()));
     sensorLipo.setProperty("Ah").send(String(battery.getAh()));