when I test the TEC in the box, I found cold but time short due to factor of the battery, at least I need a car battery but on due to the cost, I just use that requires a TTI using 15amp .
I start by making wiring all TEC and fan. 7 TEC be used to ensure cold stability must be properly ventilated so the heat can be cooled TEC.
if hot the TEC is not cooled it will damage the cold and the TEC will be damaged. because it requires a heat sink as cooling and proper flow of hot air
when I put the TEC in the box, I found that hot air and cold air mix. so I have to remove the hot air to cold air filling the space in the box. I drill a hole so that the hot air can get out.