Show the daily usage view, with data from a longer period

An interesting suggestion @Matt 4567. Some of the third party apps do have some of these features however a whole raft of 30 min data slots for a full year would be quite chunky. 
Bright in particular does allow you to compare days with each other, either in a week or say the last number of Wednesdays. 
For example 

No, not 365 x 48 data points, but 48 data points (as at present), each derived from the average of 365 readings.  The illustrated chart shows how to obscure the signal by showing too much data!

365 = whatever time span you are interested in. For simplicity I’d accept [The Selected Month or Year]

//M

On the bright app you can switch off (or on) any of the days/lines by clicking on the legend. 
 

how about combine / aggregate / average the data?

I should have been clearer in my original post, I meant “see that [30-minutes x 1 day] graph with data aggregated over the whole month”. 

Vertical units not important (it can be kWh/month or kWh/day or in that 30’ time bin), it’s the general shape that is useful.

I’ll look at the Bright app, but not if it’s more than 10 minutes messing about. Happy to spend an hour on Excel though!

//M

Join the club, so long as ‘an hour’ can stretch to ‘many hours’ 😉

The data you’re keen to get your hands on are all readily available, but as JSON. Excel (365) does have tools to convert JSON, but I find it simpler just to use ordinary spreadsheet functions (text-to-columns, filters) to make sense of them. It also depends a bit on which browser you’re using; I have Edge, which turns JSON into legible pages natively. Otherwise, you may have to resort to a third-party utility site like JSON Pretty Print. 

My house is all-electric, so I’ve no experience with gas data. And this all rather depends on the account being on the ‘new’ platform (Orion) and not the older Apollo system. I’m not perfectly sure how you tell the difference, but if you have to use an email address to sign in and your account no. is seven digits, that’s most likely Orion.

Here are some pages to look at:

1. OREX readings
2. Monthly usage
3. Daily usage
4. Half-hourly usage

To get there, open your account page and sign in. Then, open the other pages in new tabs in the same browser session, where your access token is saved for 30 minutes. If you get an error message, the chances are the token has expired; refresh the account page, sign in again if necessary and then refresh the page you’re trying to access.

In each URL, replace nnnnnnn with your 7-digit OVO account no. 

(1)  shows meter readings for the last 400 days. 
(2)  shows usage for each month in the year given in the URL. Figures are available since the account was migrated to the Orion system (in my case, that happened in January 2020). Similarly, (3) gives data for the month specified and (4) for a specific date.

Alternatively, you could cheat and use a site like JSON to CSV Converter Online!

PS

I should have included the warning: these raw data use the industry standard of GMT timings all year round. This means that the half-hourly data start at 01:00 BST each day in summertime and end at 00:59 the following day. This doesn’t normally matter much, because there’s not that much variation in ordinary people’s usage at that time of night. However, it could make a big difference if you’re trying, say, to complete a Power Move challenge requiring you to shift usage from the period 16:00-18:59 to some other time. That’s what I’m currently trying to do, so everything is off until 7PM, at which point supper preparation starts. So this is what my usage pattern for August looked like:
  
 

I’ll be trying to get rid of that 16:30 blip by making tea at 15:30 instead from now on. In case you’re wondering, the tall morning spikes are thanks to my 9kW electric shower.