Solar heating panels with solar electric (PV) pumping proved 20% greener.

[solaryes]

For further discussion of the 20% carbon clawback problem which mains powered solar water heating systems tends to suffer from and the bizarre fact that a leading UK solar trade association falsely claims that all solar is "truly zero carbon" and the ever odder fact that UK's false claims "watchdog" will not bring them to heel, please take a look at my "solar cowboys" video.