diff --git a/esp32/include/ControllerConfiguration.h b/esp32/include/ControllerConfiguration.h
index 99cfe28..61f2cf3 100644
--- a/esp32/include/ControllerConfiguration.h
+++ b/esp32/include/ControllerConfiguration.h
@@ -83,7 +83,7 @@
 #define MOIST_SENSOR_MAX_ADC                (85 * 4095 / 100)
 #define MOIST_SENSOR_MIN_ADC                (25 * 4095 / 100)
 
-#define SOLAR_VOLT_FACTOR           2
+#define SOLAR_VOLT_FACTOR           11
 #define BATTSENSOR_INDEX_SOLAR      0
 #define BATTSENSOR_INDEX_BATTERY    1