In my eyes, there's no way one is going to get a traditional HVAC in something like this due to power consumption restraints that you mention. Though, if you watch the video's of Darren preparing, hes powering more than just a laptop or a heater plate (he also employs batteries to get over those night time constraints).
That being said, I feel like one would probably better off trying to solve the heater on the cold night problem by first approaching it from a fluid dynamics perspective (kind of like a glycol HVAC) and then using minimum energy for things like a pump. Though that is probably outside of the scope for this specific project, but it is probably worth looking into for those interested in building on what is going on here.
That being said, I feel like one would probably better off trying to solve the heater on the cold night problem by first approaching it from a fluid dynamics perspective (kind of like a glycol HVAC) and then using minimum energy for things like a pump. Though that is probably outside of the scope for this specific project, but it is probably worth looking into for those interested in building on what is going on here.