Heater assembly

A simple heater system was built from 5pcs of 2.7ohm 100W aluminum case resistors and 5pcs of temperature switches, bought from China through ebay. The resistors and temperature switches were mounted on a 1m long aluminum plate that will be mounted on top of the air vent that blows air to the windshield. The idea is to have just enough heat to keep fog out of the windshield.

Temperature switches were mounted next to each of the 2.7ohm resistors. Their job is to cut the power off from the resistor next to it if it reaches the temperature switches temperature limit. The temperature switches that were ordered have a limit of 55 celsius.

The heater will be powered from the 13,2V 60Ah LiFePo4 battery pack and all of the 2.7ohm resistors are connected parallel. This gives an initial heating power of about 320W.
If the heating power of the heater turns out to be too low I'll need to either improve the heat sink, install more resistors, or install temperature switches with a higher temperature limit. Practise will tell what will need to be changed.

In addition to the windshield heater, seat heaters will be placed on front seats. Anyway while travelling in this car during cold days, some extra clothing will definitely be needed as only a fraction of the original Corolla's heating power will be available.