Here is an idea for a heat powered electricity. an iron black box to trap heat and then use the seebeck effect inside of it. put a junction of 2 different metals inside it and the other junction outside of it through a hole at the top of the box. you have to regulate the temperature difference by reflecting heat away. maybe white smooth aluminum at the top of the box. and put a solar powered fan on top of the box next to the other junction. maybe it will create a temperature difference to create the seebeck effect and create electricity.