diff --git a/driver.h b/driver.h
index 5131b45..7ea4af5 100755
--- a/driver.h
+++ b/driver.h
@@ -107,7 +107,7 @@ struct Driver
         i += 2;
         usage = bcd_2_int(telegram, i, 4);
         // in kWh
-        ret_val = usage / 3.6;
+        ret_val = usage / 360000;
         ESP_LOGVV(TAG, "Found register '0C09' with '%d'->'%f'", usage, ret_val.value());
         break;
       }