You can move Octopus tariff as and when, fee free. I’ve seen of people get moved the same day as they asked. Seems pretty flexible.
Brian,
It might be worth you getting yourself on the Octopus API forum.
People are already talking about API improvements in there.
https://forum.octopus.energy/t/api-feedback-suggestions/558
Its Phil Steele (from Octopus) little forum, so imagine the right people will see the comments etc.
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I’ll need to wait until they actually get my switch sorted out!!!
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This screenshot from PV Output? is intriguing:
Is the irradiation and cloud cover forecast now built into PV output?
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No, my python script does that.
Cloud Cover comes from Dark Sky.
Irridation and Sun Angle from
https://pysolar.readthedocs.io/en/latest/
I then send them to PVOutput as extended data variables.
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Fantastic, I will take a look at pysolar, it would be interesting to see the correlation between
irridation x (100 - cloud cover)
and your solar gen feed over time, how well does it predict your solar output generally?
Perhaps (120 - cloud cover) as panels will still likely generate something during 100% cloud cover?..
They usually do, but it depends on the thickness of the cloud deck.
Here’s a screen cap of my PV system output:
and here’s a couple of pics of the current sky conditions:
Looking East:
Looking West:
I’ve also seen zero PV output on days where the sky appears as it does in the two photos above.
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Good example, not too dissimilar weather to here today 
Switch done. Of course all meter installs are stalled now…
Finally got a solution working for a local dashboard to go on my tablet with today’s Octopus Agile pricing.
Using Home Assistant and the Node-Red, InfluxDB and Grafana add-ons (really there is no easier way to install all 3 so they work seamlessly together).
The graph shows a rolling 24Hr so far left bar is the current price. When it gets beyond half 10 at night you start to see a blank area to the right as the new data does not come out until about 16:30 but that is fine for my purposes. It is easy for the rest of the household to understand when it will be cheap.
This is a Node-Red dashboard as I could not get HADashboard to authenticate and let me show the Grafana Graph.
[edit]
I added more detail on the HA community post
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Grafana has a time window selection called today so far.
Have you tried that?
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No I haven’t, but when the new pricing comes out, it fills the rest of the next 24Hrs up which is what I want - it tells you when the next cheapest period is (max 24hrs out) so I use now to now+1d which works well.
The other trick is to add a refresh to the URL.
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You can also do things like now+1d/d
The /d limits just to the end of that day… rather than going all 24hrs?
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Going all 24hrs keeps the size of the graph constant otherwise I suspect it will want to resize all the time. Instinctively you also know how far away the next cheapest period is.
The number one question asked of me when there are Agile price plunges…
How many price plunges have there been?
How frequent are they?
Well ask no more… 
