In the mornings the truck starts rough. The FICM voltage is at 42- 42.5 volts and the battery voltage is 11.7. After the truck runs for a little bit the battery voltage goes to 13.7 volts and the FICM voltage is 47.5v-v48 volts. There are no codes show up when the FICM voltage is low. I feel that the battery is losing charge over night creating the starting issue. Is this correct?