diff --git a/src/calibration.h b/src/calibration.h
index 6fdd9cd..e0523cb 100644
--- a/src/calibration.h
+++ b/src/calibration.h
@@ -6,9 +6,9 @@
  * than the actual voltage, you have to scale by 1.02 and therefore specify
  * 1020 in this list. */
 
-#define CAL_FACTOR_U_BAT    1000
-#define CAL_FACTOR_U_SOLAR  1002
-#define CAL_FACTOR_U_SW     1005
+#define CAL_FACTOR_U_BAT     994
+#define CAL_FACTOR_U_SOLAR   997
+#define CAL_FACTOR_U_SW      996
 #define CAL_FACTOR_I_SOLAR  1015
 #define CAL_FACTOR_I_LOAD   1000