We understand your reasoning here and your thoughts about not having large quantity of electricity available to them to do it on larger scale.
You must understand that most of the patents are very old that goes back to 40-60+ years, and most of what they described in their patent description is very old and limited. All the uses and methods are now being evolved and improvised in those past decades. Sadly, so much is not available in public domain and they're effectively putting deceptions around it to limit a person in finding truth.
Even if we believe that they are limited to do it on larger scale at present due to lack of enough electricity. It will definitely change in the near future. And when they will be capable of doing it on larger scale, what will you do then?
Anyways, we have posted new post and also explained more about the "Piezoelectric nano-crystals", please take a look here 🙂
Enjoy all the perfect weather.