Hi @BeWin
If your meter was changed, the important thing would be to identify where the estimate is coming from. Either the end read of the previous meter, or assuming you have got a smart meter as you mention you have solar, a connection dropout when we were receiving the interval data and instead getting an estimate from your distributor or meter data provider.
I'm going to send you a Private Message so I can look further into this for you.
Thank you, Chris