Axle event increases the import price as well

[ivanovivan80]

Hi,

Is it expected an Axle event to increase the import price with the same amount as the export price?

predbat_plan(1).html

I am not sure if this has changed or it was always like this.

Thank you!
Ivan,

[gcoan]

Its always been like this, same for Octopus power down sessions

Covered in the documentation as to why it is like this https://springfall2008.github.io/batpred/energy-rates/#axle-vpp - in short its to recognise the lost opportunity that importing would cause, and if you had a high export rate and a normal import rate then this could cause Predbat to cycle between importing and exporting during the session.

[ivanovivan80]

Thanks Geoffrey,

I tried searching for the answer in the docs but as it happens often I struggle to find one.

I am trying to troubleshoot a problem in the plan. For some reason a charge slots were planned during the high rate immediately before the Axle event. I thought that it might be related.

I forced manual export to avoid building cost unnecessary.

Perhaps, I have to open it as an issue to run thorough the AI.

Thank you!

[gcoan]

a charge slots were planned during the high rate immediately before the Axle event.

this is quite probably normal and to be expected.

In the Axle period you will get £1/kWh so the more you have in the battery, as long your inverter can discharge and export it, the better. So Predbat could plan a charge in a higher rate before the Axle event because even though you are importing at 28.15p, you are exporting at £1 so still making ~70p/kWh after losses