How to Heat a Roof Top Tent?

By installing an additional layer of fabric as an inner wall (available from manufacturers), you can increase the perceived temperature inside by up to 10 °C.
A thermal blanket, the kind you can get at a pharmacy for about 6 PLN, will definitely help you warm up in an emergency.
An electric blanket or electric mat powered via USB or a car cigarette lighter has low power consumption while providing really nice warmth.
Parking heaters | Webasto – both the original and alternatives from other brands like Hcalory or Barracuda – run on diesel and electricity; you can run a warm air duct directly from them into the tent.
A warm sleeping bag – choose one that meets the thermal insulation parameters specified by the European standard EN 13537.

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