I like to break a road trip with a cup of tea or coffee but until earlier today my only water-boiling options involved use of a naked flame (methylated spirits burner) - contraindicated in a hot Australian summer with severe fire restrictions in most areas.
Today I bought a 12-volt cordless electric kettle. Experience with such devices tells me that while the engine is running, I’d need to allow around 8 minutes to boil enough water for a proper brew.
I keep a supply of tea bags & coffee pods on board: the latter are a measured dose of coffee in a sealed package idea for use in the AeroPress which I also keep in the car.
It’ll be seeing some use on the weekend, to get to the family reunion is a mere 3·5 hour drive & naturally a similar time to get home the follwing day.