I have/had a smets1 from OVO which (recently - last October) they upgraded to smets2 over the air (without letting me know). As a result I was about 2 months with no ability to read my daily electric consumption even though gas was there. After much interaction with OVO, it finally got fixed. The "upgrade" provided three channels and confused which tariff belonged on which channel. (I'm on economy 7). I have ev, home battery and solar panels - so my usage kind of confused them... Apart from badgering them a lot, there is not a lot of other options.