I've just heard a rumor that a Chinese factory is secretly selling a
home solar thermal kit for 700 yuan (100$) a m^2, that can produce
0.5kwh of electricity PLUS 5kwh of heat per day.
Sounds too good to be true: over 10 years, that would only cost 7c per
kwh of electricity, all that heat coming for free. But Chinese prices
are often unbelievable.
Anyone can confirm (or infirm) this? Or with an address?