As I understand it (and this is from memory from an article I read so may be only vaguely accurate) on the 1st of March of this year the EU changed the rating scheme, basically made it much stricter than it was before, and whereas before a TV could use like 100w of power and be A rated, now an A rating must be under 20W or something which is very unlikely for current TVs so almost all are around the lowest rating, I assume with the idea that it will push manufacturers to focus on improving energy efficiency so they can get a better ranking than most. I guess when most get an A, as a consumer you think ‘well, I’ve got the best’ and that’s where it stays, the incentive is gone to find even better ones, whereas now in a sea of G’s, a D will really mean something, and as most people from school think A-C are the ‘good grades’ they hope manufacturers will really push themselves to get up into the top half of the table.
Our newish TV came with 2 stickers, an A and perhaps a G, and it made me curious why there were 2 and why wildly different hence me googling and finding the article.