The sad reality :: https://brilliantlightpower.co…Overview_Presentation.pdf
The COP is low and most likely its also a material issue. Please do not say if you can produce your own current the problem is solved... This just holds for a heater not for an electric power station where heat is waste.
I wish BLP the best, because in turn we will all benefit from their success, but I also take all their public statements with a grain of salt, specially after close to 20 years reading similar statements.