Can I access downloadable usage data for prior year?

You could try sites such as Glowmarkt (or their Bright App) or n3rgy - Unified access to smart energy data (who supply gas usage data in m3 rather than kWh). There are others as well. I’m sure others will chip in with their suggestions.

With Glowmarkt you will need to supply your MPAN number and may/might be able to get data going back up to 12 months depending on how long your smart meter has been logging data and the frequency of reading (daily or half-hourly). Data can be downloaded as a CSV file and then imported straight into Excel. If you link the data (rather than copy/paste) you should be able to simply refresh the data after each download.

Good luck!

Thank You BeePee and Firedog - I will be investigating these solutions.

I tried Glomarket, but that only returned a few months of data.

I’ve just looked at Firedogs solution and although I have some understanding of the concept, as you can only output one day at a time, I find copying and pasting the data direct from the individual day usage webpage into an EXCEL spreadsheet a lot easier. I strip out the kWh trailing digits using a text formula, and then periodically convert text to numbers so it becomes usable data. What a faff, shame OVO cannot share our own data with us in a usable format.

Hi @Phil225xe 

Glowmarkt and the Hildebrand smart app should be able to recover 12 months worth of data from the meter (assuming you have had a smart meter for longer than 12 months of course!). Have a read of

How to recover historical meter readings- Would this information be retained on the meter | The OVO Forum

which also links to

Energy usage data from third party Apps: Ivie, Loop and Hugo - my guide | The OVO Forum

I obtained a full 12 months from Glowmarkt for myself and a neighbour. It may also take a while to back-fill the data.

Glowmarkt/Hilderbrand support is very good and responsive should you have issues.

It would be nice to do this directly from OVO, however some suppliers are still in the dark ages. No facility to download at all and quarterly or half yearly statements which makes it a pain to see how much you owe (or are in credit) from day to day (my mother’s accounts).

When comparing data the weather is the critical factor. Comparing with the same date last years is pointless.

You need to somehow compare usage against outside temperature either on a daily (lots of scatter) or weekly basis.

You might be able to get local weather data from Met Office WOW - Home Page 

You can look up ‘degree days’ data for a nearby location.

Great!
  

RAF Wittering is only 19 miles away, the nearest to me in suburban Leatherhead is Kenley which is 20 miles away.

I had my tongue in my cheek when I posted that map. It just shows that I’m smack in the middle of a desert in so many respects - mobile masts, for example. Whenever I search for x near me on Google, x marks spots miles away.

I’ve used the historical data from RAF Waddington, which is my nearest Met Office station. It’s just not very easy to handle. Luckily, this doesn’t really have any meaning for me - heat pumps are just a pipe dream.