That’s true, when breaking it down to what works in the long run. I don’t mind the Happy1 model to work here in Guam. Since that can work with the solar on top to charge up the battery at times and helps in heats. But, could be bad for the heat within the car, as long you can create a cooling section covering, to help maintain the lithium battery from overheating at some point. And yeah, different campers does work differently that will work for those who will like on what they need.