Here is an extract from the table showing my gas usage yesterday evening. As you can see, two values are recorded: 8.30pm and 9pm. If usage is recorded at 8.30pm, does this show what has been used between 8pm and 8.30pm or what has been used between 8.30pm and 9pm?
Best answer by Bendog
Today I have agreed to close the case I raised regarding the issue of missing data and the “data shift” issues. This is an extract from the reply I received from Dawn at OVO.
“Thank you for highlighting the "data shift" where your heating usage, which you observe coming on at 6:30 am, is recorded in the 6:00 am half-hourly slot. This is a known aspect of how smart meters and the data network report usage. The meter records consumption in a given half-hour period (e.g., 6:00:00 to 6:29:59) and then transmits that total. Depending on the exact timing of the meter reading and data processing, usage that begins at 6:30 am often falls into the total for the preceding 6:00 am slot. This inherent delay can indeed make precise real-time management of usage for specific initiatives challenging, and we appreciate your feedback on this.”
As you can see, OVO acknowledge this is a “known issue”. Knowing this, I wonder how and why it was decided to offer a “time of use” initiative for gas users. Earlier in the email, I was told that any missing data is a DCC issue. I still wonder why almost all of my missing data occurs at the same time.
Did your little experiment with changing the Hive heating control timing reveal anything?
It changed nothing. From 1st - 16th January, no data was recorded for the 10.30pm and 11pm slots on seven days.
OK - it’s always good to be able to rule things out when troubleshooting!
I’m still inclined to believe that this strange error is nothing to do with OVO, and almost as confident that DCC isn’t at fault either. If I were determined to get to the bottom of it, I’d be asking Landis & Gyr’s tech support whether they could shed any light on it.
Just to add to the confusion about dropped time slots, on January 19th, no data was recorded for 1am and 1,30am!! It is interesting that it seems to be always an hour that is missed.
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