Mr Cholmondeley-Warner wrote: Estimated on your behalf at 50% of your energy consumption. Not measured.
It's actually 50% of the energy generated, not consumed. My "non-smart" digital meter shows "rEd (reverse energy detected)" when solar power is being generated regardless of whether it is being used or not. I believe that the smart meters are not smart enough to cover that. Also, I seem to recall that smart meters need an internet connection which then begs another question - who pays for it? Whilst the meter readings should always be accurate, they can't replace the numpties who c*ck up the billing.