diff --git a/firmware/inc/hw_config.h b/firmware/inc/hw_config.h
index 6e56401..4ed7dcd 100644
--- a/firmware/inc/hw_config.h
+++ b/firmware/inc/hw_config.h
@@ -144,8 +144,8 @@
 #define BATTERY_ADC_PIN		PIN_PA02
 #define BATTERY_ADC_PINMUX	PINMUX_PA02B_ADC_AIN0
 #define BATTERY_ADC_CHANNEL	ADC_POSITIVE_INPUT_PIN0
-#define BATTERY_ADC_CHANNEL_DIV	1
-/*0.3125*/
+#define BATTERY_ADC_CHANNEL_DIV	1 /*0.3125*/
+#define BATTERY_ADC_REFERENCE	ADC_REFERENCE_INT1V
 
 /**
  * External Thermistor ADC
@@ -154,7 +154,8 @@
 #define THERMISTOR_ADC_PIN	PIN_PA03
 #define THERMISTOR_ADC_PINMUX	PINMUX_PA03
 #define THERMISTOR_ADC_CHANNEL	ADC_POSITIVE_INPUT_PIN1
-#define THERMISTOR_ADC_CHANNEL_DIV 1
+#define THERMISTOR_ADC_CHANNEL_DIV 1.48
+#define THERMISTOR_ADC_REFERENCE ADC_REFERENCE_INTVCC0 /* internal 1/1.48 VCC reference */
 
 /**
  * Solar ADC
@@ -169,6 +170,7 @@
 #define SOLAR_ADC_PINMUX	PINMUX_PA04B_ADC_AIN4
 #define SOLAR_ADC_CHANNEL	ADC_POSITIVE_INPUT_PIN4
 #define SOLAR_ADC_CHANNEL_DIV	1
+#define SOLAR_ADC_REFERENCE	ADC_REFERENCE_INT1V
 
 /**
  * Radio